tree-edit support golang

support golang

Open fgeller opened this issue 3 years ago • 7 comments
hey! great presentation at emacsconf - thanks for pouring time into this project :) i'd love to try it for my daily work, but i use mainly golang. i'd like to add support but it doesn't seem as straight-forward. would you like me to collect questions here or do you prefer another channel?
Dec 07 '21 17:12 fgeller
Glad you liked it! Yep, in GH issues works perfectly fine. Not sure how much you've surmised so far, but here's the basic rundown for adding a new lang:
Clone tree-sitter-langs somewhere
Run cask emacs --script dev/tree-edit-generate-grammars.el <tree-sitter-langs>/repos/<language>/src/grammar.json <language> <language-mode> in tree-edit root
Copy tree-edit-java.el to tree-edit-<language>.el and replace code as needed (a template should probably be autogenerated)
Add language to tree-edit-language-alist
See what breaks!
As you can probably tell this project is still pretty rocky so something may explode along the way, but this should be a fun trial run :) Let me know if anything comes up!
Dec 07 '21 18:12 ethan-leba
alright, let's start the process :)
i got till step 2, then the script fails when parsing the grammar -- might be a quick one for you, else i'll start digging:
tree-edit % cask emacs --script dev/tree-edit-generate-grammars.el /home/fgeller/src/github.com/emacs-tree-sitter/tree-sitter-langs/repos/go/src/grammar.json go go-mode                                                                                                                                                                                                                                                                                                                                                                                          
Parsing go grammar at /home/fgeller/src/github.com/emacs-tree-sitter/tree-sitter-langs/repos/go/src/grammar.json.                                                                                                                                                                                                                                                                                                                                                                                                                                                 
failed to parse source_file                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
failed to parse _top_level_declaration                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
failed to parse package_clause                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
failed to parse import_declaration                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
failed to parse import_spec                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
failed to parse dot                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
failed to parse blank_identifier                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
failed to parse import_spec_list                                                                                                                                                                                                                                                                                                                                                              
failed to parse _declaration                                                                                                                                                                                                                                                                                                                                                                  
failed to parse const_declaration                                                                                                                                                                                                                                                                                                                                                             
failed to parse const_spec                                                                                                                                                                                                                                                                                                                                                                    
failed to parse var_declaration                                                                                                                                                                                                                                                                                                                                                               
failed to parse var_spec                                                                                                                                                                                                                                                                                                                                                                      
failed to parse function_declaration                                                                                                                                                                                                                                                                                                                                                          
failed to parse method_declaration                                                                                                                                                                                                                                                                                                                                                            
failed to parse parameter_list                                                                                                                                                                                                                                                                                                                                                                
failed to parse parameter_declaration                                                                                                                                                                                                                                                                                                                                                         
failed to parse variadic_parameter_declaration                                                                                                                                                                                                                                                                                                                                                
failed to parse type_alias                                                                                                                                                                                                                                                                                                                                                                    
failed to parse type_declaration                                                                                                                                                                                                                                                                                                                                                              
failed to parse type_spec                                                                                                                                                                                                                                                                                                                                                                     
failed to parse field_name_list                                                                                                                                                                                                                                                                                                                                                               
failed to parse expression_list                                                                                                                                                                                                                                                                                                                                                               
failed to parse _type                                                                                                                                                                                                                                                                                                                                                                         
failed to parse parenthesized_type                                                                                                                                                                                                                                                                                                                                                            
failed to parse _simple_type                                                                                                                                                                                                                                                                                                                                                                  
failed to parse pointer_type                                                                                                                                                                                                                                                                                                                                                                  
failed to parse array_type                                                                                                                                                                                                                                                                                                                                                                    
failed to parse implicit_length_array_type                                                                                                                                                                                                                                                                                                                                                    
failed to parse slice_type                                                                                                                                                                                                                                                                                                                                                                    
failed to parse struct_type                                                                                                                                                                                                                                                                                                                                                                   
failed to parse field_declaration_list                                                                                                                                                                                                                                                                                                                                                        
failed to parse field_declaration                                                                                                                                                                                                                                                                                                                                                             
failed to parse interface_type                                                                                                                                                                                                                                                                                                                                                                
failed to parse method_spec_list                                                                                                                                                                                                                                                                                                                                                              
failed to parse method_spec                                                                                                                                                                                                                                                                                                                                                                   
failed to parse map_type                                                                                                                                                                                                                                                                                                                                                                      
failed to parse channel_type                                                                                                                                                                                                                                                                                                                                                                  
failed to parse function_type                                                                                                                                                                                                                                                                                                                                                                 
failed to parse block                                                                                                                                                                                                                                                                                                                                                                         
failed to parse _statement_list                                                                                                                                                                                                                                                                                                                                                               
failed to parse _statement                                                                                                                                                                                                                                                                                                                                                                    
failed to parse empty_statement                                                                                                                                                                                                                                                                                                                                                               
failed to parse _simple_statement                                                                                                                                                                                                                                                                                                                                                             
failed to parse send_statement                                                                                                                                                                                                                                                                                                                                                                
failed to parse receive_statement                                                                                                                                                                                                                                                                                                                                                             
failed to parse inc_statement                                                                                                                                                                                                                                                                                                                                                                 
failed to parse dec_statement                                                                                                                                                                                                                                                                                                                                                                 
failed to parse assignment_statement                                                                                                                                                                                                                                                                                                                                                          
failed to parse short_var_declaration                                                                                                                                                                                                                                                                                                                                                         
failed to parse labeled_statement                                                                                                                                                                                                                                                                                                                                                             
failed to parse empty_labeled_statement                                                                                                                                                                                                                                                                                                                                                       
failed to parse fallthrough_statement                                                                                                                                                                                                                                                                                                                                                         
failed to parse break_statement                                                                                                                                                                                                                                                                                                                                                               
failed to parse continue_statement                                                                                                                                                                                                                                                                                                                                                            
failed to parse goto_statement                                                                                                                                                                                                                                                                                                                                                                
failed to parse return_statement                                                                                                                                                                                                                                                                                                                                                              
failed to parse go_statement                                                                                                                                                                                                                                                                                                                                                                  
failed to parse defer_statement                                                                                                                                                                                                                                                                                                                                                               
failed to parse if_statement                                                                                                                                                                                                                                                                                                                                                                  
failed to parse for_statement                                                                                                                                                                                                                                                                                                                                                                 
failed to parse for_clause                                                                                                                                                                                                                                                                                                                                                                    
failed to parse range_clause                                                                                                                                                                                                                                                                                                                                                                  
failed to parse expression_switch_statement                                                                                                                                                                                                                                                                                                                                                   
failed to parse expression_case                                                                                                                                                                                                                                                                                                                                                               
failed to parse default_case                                                                                                                                                                                                                                                                                                                                                                  
failed to parse type_switch_statement                                                                                                                                                                                                                                                                                                                                                         
failed to parse _type_switch_header                                                                                                                                                                                                                                                                                                                                                           
failed to parse type_case                                                                                                                                                                                                                                                                                                                                                                     
failed to parse select_statement                                                                                                                                                                                                                                                                                                                                                              
failed to parse communication_case                                                                                                                                                                                                                                                                                                                                                            
failed to parse _expression                                                                                                                                                                                                                                                                                                                                                                   
failed to parse parenthesized_expression                                                                                                                                                                                                                                                                                                                                                      
failed to parse call_expression                                                                                                                                                                                                                                                                                                                                                               
failed to parse variadic_argument                                                                                                                                                                                                                                                                                                                                                             
failed to parse special_argument_list                               
failed to parse argument_list                                       
failed to parse selector_expression                                 
failed to parse index_expression                                    
failed to parse slice_expression                                    
failed to parse type_assertion_expression                           
failed to parse type_conversion_expression                                                                                                                                                                                                     
failed to parse composite_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                             
failed to parse literal_value                                       
failed to parse keyed_element                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
failed to parse element                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
failed to parse func_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
failed to parse unary_expression                                                                                                                                                                                                                                                                                                                                                                                                                                                              
failed to parse binary_expression                                                                                                                                                                                                                                                                                                                                                                                                                                                             
failed to parse qualified_type                                                                                                                                                                                                                                                                                                                                                                                                                                                                
failed to parse identifier                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
failed to parse _type_identifier                                                                                                                                                                                                                                                                                                                                                                                                                                                              
failed to parse _field_identifier                                                                                                                                                                                                                                                                                                                                                                                                                                                             
failed to parse _package_identifier                                                                                                                                                                                                                                                                                                                                                                                                                                                           
failed to parse _string_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                               
failed to parse raw_string_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                            
failed to parse interpreted_string_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                    
failed to parse escape_sequence                                                                                                                                                                                                                                                                                                                                                                                                                                                               
failed to parse int_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
failed to parse float_literal                                       
failed to parse imaginary_literal                                   
failed to parse rune_literal                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
failed to parse nil                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
failed to parse true                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
failed to parse false                                                                                                                                                                                                                          
failed to parse comment                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
Debugger entered--Lisp error: (error "Expected regex node, found ((type . TOKEN) (conten...")                                                                                                                                                                                                                                                                                                                                                                                                 
  error("Expected regex node, found %s" ((type . "TOKEN") (content (type . "SEQ") (members ((type . "CHOICE") (members ((type . "PATTERN") (value . "\\p{L}")) ((type . "STRING") (value . "_")))) ((type . "REPEAT") (content (type . "CHOICE") (members (... ...) (... ...))))))))                                                                                                                                                                                                          
  (let nil (error "Expected regex node, found %s" identifier-node)) 
  (if (equal x314 '"PATTERN") (let* ((x315 (cdr-safe identifier-node))) (if (consp x315) (let* ((x316 (car-safe x315))) (if (consp x316) (let* ((x317 ...)) (if (eq x317 ...) (let* ... ...) (let nil ...))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))
  (let* ((x314 (cdr-safe x312))) (if (equal x314 '"PATTERN") (let* ((x315 (cdr-safe identifier-node))) (if (consp x315) (let* ((x316 (car-safe x315))) (if (consp x316) (let* (...) (if ... ... ...)) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node))))
  (if (eq x313 'type) (let* ((x314 (cdr-safe x312))) (if (equal x314 '"PATTERN") (let* ((x315 (cdr-safe identifier-node))) (if (consp x315) (let* ((x316 ...)) (if (consp x316) (let* ... ...) (let nil ...))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))
  (let* ((x313 (car-safe x312))) (if (eq x313 'type) (let* ((x314 (cdr-safe x312))) (if (equal x314 '"PATTERN") (let* ((x315 (cdr-safe identifier-node))) (if (consp x315) (let* (...) (if ... ... ...)) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node))))
  (if (consp x312) (let* ((x313 (car-safe x312))) (if (eq x313 'type) (let* ((x314 (cdr-safe x312))) (if (equal x314 '"PATTERN") (let* ((x315 ...)) (if (consp x315) (let* ... ...) (let nil ...))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))
  (let* ((x312 (car-safe identifier-node))) (if (consp x312) (let* ((x313 (car-safe x312))) (if (eq x313 'type) (let* ((x314 (cdr-safe x312))) (if (equal x314 '"PATTERN") (let* (...) (if ... ... ...)) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node))))
  (if (consp identifier-node) (let* ((x312 (car-safe identifier-node))) (if (consp x312) (let* ((x313 (car-safe x312))) (if (eq x313 'type) (let* ((x314 ...)) (if (equal x314 ...) (let* ... ...) (let nil ...))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))
  (let ((identifier-node (alist-get (intern (alist-get 'word grammar)) (alist-get 'rules grammar)))) (if (consp identifier-node) (let* ((x312 (car-safe identifier-node))) (if (consp x312) (let* ((x313 (car-safe x312))) (if (eq x313 'type) (let* (...) (if ... ... ...)) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node)))) (let nil (error "Expected regex node, found %s" identifier-node))))
  tree-edit--extract-word-regex(((name . "go") (word . "identifier") (rules (source_file (type . "REPEAT") (content (type . "CHOICE") (members ... ...))) (_top_level_declaration (type . "CHOICE") (members (... ...) (... ...) (... ...) (... ...))) (package_clause (type . "SEQ") (members (... ...) (... ...))) (import_declaration (type . "SEQ") (members (... ...) (... ...))) (import_spec (type . "SEQ") (members (... ...) (... ... ...))) (dot (type . "STRING") (value . ".")) (blank_identifier (type . "STRING") (value . "_")) (import_spec_list (type . "SEQ") (members (... ...) (... ...) (... ...))) (_declaration (type . "CHOICE") (members (... ...) (... ...) (... ...))) (const_declaration (type . "SEQ") (members (... ...) (... ...))) (const_spec (type . "PREC_LEFT") (value . 0) (content (type . "SEQ") (members ... ...))) (var_declaration (type . "SEQ") (members (... ...) (... ...))) (var_spec (type . "SEQ") (members (... ... ...) (... ...))) (function_declaration (type . "PREC_RIGHT") (value . 1) (content (type . "SEQ") (members ... ... ... ... ...))) (method_declaration (type . "PREC_RIGHT") (value . 1) (content (type . "SEQ") (members ... ... ... ... ... ...))) (parameter_list (type . "SEQ") (members (... ...) (... ...) (... ...))) (parameter_declaration (type . "SEQ") (members (... ... ...) (... ... ...))) (variadic_parameter_declaration (type . "SEQ") (members (... ... ...) (... ...) (... ... ...))) (type_alias (type . "SEQ") (members (... ... ...) (... ...) (... ... ...))) (type_declaration (type . "SEQ") (members (... ...) (... ...))) (type_spec (type . "SEQ") (members (... ... ...) (... ... ...))) (field_name_list (type . "SEQ") (members (... ...) (... ...))) (expression_list (type . "SEQ") (members (... ...) (... ...))) (_type (type . "CHOICE") (members (... ...) (... ...))) (parenthesized_type (type . "SEQ") (members (... ...) (... ...) (... ...))) (_simple_type (type . "CHOICE") (members (... ... ...) (... ...) (... ...) (... ...) (... ...) (... ...) (... ...) (... ...) (... ...) (... ...))) (pointer_type (type . "PREC") (value . 6) (content (type . "SEQ") (members ... ...))) (array_type (type . "SEQ") (members (... ...) (... ... ...) (... ...) (... ... ...))) (implicit_length_array_type (type . "SEQ") (members (... ...) (... ...) (... ...) (... ... ...))) (slice_type (type . "SEQ") (members (... ...) (... ...) (... ... ...))) (struct_type (type . "SEQ") (members (... ...) (... ...))) (field_declaration_list (type . "SEQ") (members (... ...) (... ...) (... ...))) (field_declaration (type . "SEQ") (members (... ...) (... ... ...))) (interface_type (type . "SEQ") (members (... ...) (... ...))) (method_spec_list (type . "SEQ") (members (... ...) (... ...) (... ...))) (method_spec (type . "SEQ") (members (... ... ...) (... ... ...) (... ... ...))) (map_type (type . "SEQ") (members (... ...) (... ...) (... ... ...) (... ...) (... ... ...))) ...) (extras ((type . "SYMBOL") (name . "comment")) ((type . "PATTERN") (value . "\\s"))) (conflicts ("_simple_type" "_expression") ("qualified_type" "_expression") ("func_literal" "function_type") ("function_type") ("parameter_declaration" "_simple_type")) (precedences) (externals) (inline "_type" "_type_identifier" "_field_identifier" "_package_identifier" "_top_level_declaration" "_string_literal") (supertypes "_expression" "_type" "_simple_type" "_statement" "_simple_statement")))
  (prin1-to-string (tree-edit--extract-word-regex raw-grammar))
  (format tree-edit--grammar-template name mode (list 'quote (prin1-to-string grammar)) (prin1-to-string (tree-edit--extract-word-regex raw-grammar)) (list 'quote (prin1-to-string supertypes)) (list 'quote (prin1-to-string (tree-edit--invert-supertypes supertypes))) (list 'quote (prin1-to-string (tree-edit--generate-alias-names grammar))) (list 'quote (prin1-to-string (tree-edit--generate-containing-types grammar))))
  (let* ((raw-grammar (let ((json-array-type 'list)) (json-read-file path))) (grammar (map-apply #'(lambda (type node) (cons type (tree-edit--process-grammar node))) (alist-get 'rules raw-grammar))) (grammar (tree-edit--extract-grammar grammar)) (supertypes (tree-edit--generate-supertypes grammar))) (format tree-edit--grammar-template name mode (list 'quote (prin1-to-string grammar)) (prin1-to-string (tree-edit--extract-word-regex raw-grammar)) (list 'quote (prin1-to-string supertypes)) (list 'quote (prin1-to-string (tree-edit--invert-supertypes supertypes))) (list 'quote (prin1-to-string (tree-edit--generate-alias-names grammar))) (list 'quote (prin1-to-string (tree-edit--generate-containing-types grammar)))))
  tree-edit--generate-grammar-file("/home/fgeller/src/github.com/emacs-tree-sitter/tre..." "go" "go-mode")
  (let ((time-start (float-time)) (templated-string (tree-edit--generate-grammar-file path name mode))) (insert templated-string) (message (format "Wrote grammar to %s after %s seconds." file-name (round (- (float-time) time-start)))))
  (save-current-buffer (set-buffer temp-buffer) (let ((time-start (float-time)) (templated-string (tree-edit--generate-grammar-file path name mode))) (insert templated-string) (message (format "Wrote grammar to %s after %s seconds." file-name (round (- (float-time) time-start))))))
  (prog1 (save-current-buffer (set-buffer temp-buffer) (let ((time-start (float-time)) (templated-string (tree-edit--generate-grammar-file path name mode))) (insert templated-string) (message (format "Wrote grammar to %s after %s seconds." file-name (round (- (float-time) time-start)))))) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0)))
  (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (let ((time-start (float-time)) (templated-string (tree-edit--generate-grammar-file path name mode))) (insert templated-string) (message (format "Wrote grammar to %s after %s seconds." file-name (round (- ... time-start)))))) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))
  (let ((temp-file (format "tree-edit-%s-grammar.el" name)) (temp-buffer (generate-new-buffer " *temp file*" t))) (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (let ((time-start (float-time)) (templated-string (tree-edit--generate-grammar-file path name mode))) (insert templated-string) (message (format "Wrote grammar to %s after %s seconds." file-name (round ...))))) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer))))
  (let* ((--dash-source-12-- command-line-args-left) (path (car-safe (prog1 --dash-source-12-- (setq --dash-source-12-- (cdr --dash-source-12--))))) (name (car-safe (prog1 --dash-source-12-- (setq --dash-source-12-- (cdr --dash-source-12--))))) (mode (car --dash-source-12--)) (file-name (format "tree-edit-%s-grammar.el" name))) (message (format "Parsing %s grammar at %s." name path)) (let ((temp-file (format "tree-edit-%s-grammar.el" name)) (temp-buffer (generate-new-buffer " *temp file*" t))) (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (let ((time-start ...) (templated-string ...)) (insert templated-string) (message (format "Wrote grammar to %s after %s seconds." file-name ...)))) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))
  load-with-code-conversion("/home/fgeller/src/github.com/fgeller/dots/.emacs.d..." "/home/fgeller/src/github.com/fgeller/dots/.emacs.d..." nil t)
  command-line-1(("-scriptload" "dev/tree-edit-generate-grammars.el" "/home/fgeller/src/github.com/emacs-tree-sitter/tre..." "go" "go-mode"))
  command-line()
  normal-top-level()
Dec 07 '21 22:12 fgeller
Tried this out, it looks like you ran into two things here:
The code in main doesn't handle the immediate token type, but luckily I have a commit for that hanging around
Tree-edit expects identifiers to be expressed as a regex, but the go grammar doesn't use a regex for it.
I pushed fixes for these two things to a branch, hopefully that should sort those issues out! I'll have to merge fixes for these two into main at some point, but working off of that branch should suffice for now.
Dec 08 '21 02:12 ethan-leba
thanks, that worked! i was able to generate the grammar and complete the 4 steps above. next i need to update tree-edit-go.el but i wanted to start by getting basic motion to work without evil. need a bit more time to figure out how the tree and current node are maintained (would appreciate pointers but mostly wanted to post a reply and say thanks :))
Dec 08 '21 10:12 fgeller
pushing my changes on top of the go-test branch to my fork
Dec 08 '21 10:12 fgeller
thanks, that worked!
Awesome! :)
i wanted to start by getting basic motion to work without evil.
Yeah, I understand that using evil is a hard sell for those who aren't already fully bought into the ecosystem, and that's something I'd like to address. I've tried to keep the tree-edit library focused on being a library, but there's probably alot of code in evil-tree-edit that would be useful for other packages that want to wrap tree-edit. Maybe some could be integrated? Or I could just point folks to copypasta from evil-tree-edit, need to think on that.
I think a modal solution is the best fit for tree-edit though, so maybe something using hydra to emulate an evil state is a more emacsy solution. Do you have any thoughts on a more emacs idiomatic approach to this? I'm frankly as evil as they come, so I probably don't have the best insight on this.
Dec 08 '21 14:12 ethan-leba
i prefer modal editing myself, no need to convince me ;) i just don't use evil-mode but something custom :shrug:
that said, i'd probably try to have the motion and edit commands as the main exports of the tree-edit lib . so it'd be easy to use it with a evil/hydra/custom key bindings approach.
Dec 08 '21 20:12 fgeller
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