levee

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My tiny (~54k on osx/x86_64; smaller on 32 bit machines) & ancient (first written sometime in 1979 (in USCD pascal; I converted it to C sometime in the early 1980s)) almost-vi-clone.

I think it implements about 95% of visual mode; I still use it on most of my machines and only notice things lacking in exec mode (I don't implement :g and :v) and when displaying long lines (standard vi wraps, I -- following the lead of the USCD pascal editor -- truncate.)

Over its life it's been built on

• USCD pascal (in Pascal, then in p2; those sources may no longer exist because 8" floppies were expensive and I didn't do version control because they were tiny)
• TOS on the Atari ST
• MS-DOS
• Flexos
• iRMX
• OS/2
• Linux (the first version to make it into SCCS, in 1993, after 13 or 14 years of use, porting, and development)
• FreeBSD
• NetBSD
• Macosx
• Windows 10

And it's currently (version 4) being built on Unixes (osx,*bsd,Linux), Windows 10, and OS/2 v4 (both windows 10 & OS/2 are using their respective console ANSI emulation, both of which have issues.)

The configuration options are

• --use-termcap; link with termcap instead of curses, if at all possible.
• --partial-install; don't install the lv, lv(1) name links.
• --size=NNN; use an NNN-byte editor buffer (this is the maximum sized file that can be edited without truncation.
• --stdio; use stdio for buffered i/o whenever practical
• --logging; write copious logs to levee.log (in the startup directory)
• --tputs; write control strings using the pacing functions in termcap
• --noglob; don't use the system glob() function to expand wildcards
• --ucsd; enable reading ucsd pascal .text files (via the -p option)
• --dos; build for ms-dos
• --tos; build for TOS
• --rmx; build for iRMX
• --flexos; build for flexOS
• --win10; build for Windows (only tested on Windows 10)
• --prefix; root of where to install things (defaults to /usr/local)
• --execdir; where to install binaries ($prefix/bin)
• --mandir; where to install the manpages ($prefix/man or $prefix/share/man)