Cannot force rm formulas with dependencies

[Ken-B]

My Pkg.update() is failing because of Pkg.build("Homebrew").

julia> Homebrew.upgrade()
Error: Refusing to uninstall /Users/ken/.julia/v0.5/Homebrew/deps/usr/Cellar/gmp/6.1.1
because it is required by libgfortran 6.2, nettle 3.3, which are currently installed.
You can override this and force removal with:
  brew uninstall --ignore-dependencies gmp
ERROR: failed process: Process(`/Users/ken/.julia/v0.5/Homebrew/deps/usr/bin/brew rm gmp --force`, ProcessExited(1)) [1]
 in pipeline_error(::Base.Process) at ./process.jl:616
 in run(::Cmd) at ./process.jl:592
 in #brew#2(::Bool, ::Bool, ::Bool, ::Bool, ::Bool, ::Function, ::Cmd) at /Users/ken/.julia/v0.5/Homebrew/src/API.jl:19
 in (::Homebrew.#kw##brew)(::Array{Any,1}, ::Homebrew.#brew, ::Cmd) at ./<missing>:0
 in (::Homebrew.#kw##rm)(::Array{Any,1}, ::Homebrew.#rm, ::String) at ./<missing>:0
 in #rm#53(::Bool, ::Bool, ::Function, ::Homebrew.BrewPkg) at /Users/ken/.julia/v0.5/Homebrew/src/API.jl:559
 in (::Homebrew.#kw##rm)(::Array{Any,1}, ::Homebrew.#rm, ::Homebrew.BrewPkg) at ./<missing>:0
 in #upgrade#8(::Bool, ::Function) at /Users/ken/.julia/v0.5/Homebrew/src/API.jl:140
 in upgrade() at /Users/ken/.julia/v0.5/Homebrew/src/API.jl:139

I fixed this by running ~/.julia/v0.5/Homebrew/deps/usr/bin/brew upgrade.

Maybe related, I also noticed the Homebrew.outdated() function was returning different results from my system's brew that had up to date packages (same brew version v1.1.5 revision 84c765).

$ pwd
/Users/ken/.julia/v0.5/Homebrew/deps/usr/bin
$ ./brew outdated
gmp (6.1.1) < 6.1.2
harfbuzz (1.3.4) < 1.3.4_1
homebrew/science/hdf5 (1.8.17) < 1.8.18
icu4c (58.1) < 58.2
$ brew outdated

(When opening an issue, please ping @staticfloat .)

[dgleich]

I hit this same issue as well. As mentioned, running

~/.julia/v0.5/Homebrew/deps/usr/bin/brew upgrade

worked to fix it

[iamed2]

Thanks for this fix, I've been assuming something was wrong with my setup until I got a fresh computer and had the same problem.

[staticfloat]

Thanks for the reports guys, I've added the --ignore-dependencies flag to rm() so now this shouldn't be as much of a problem as before. A new version of Homebrew containing these changes is currently awaiting merging into METADATA.

[iamed2]

Thanks!