Could not update local repository on mac

[feihong]

Problem is identical to that described in #3433, but on Mac OS X instead of OpenBSD. My fix was to run brew install gpatch, after which opam update worked without issue. Perhaps you could update the Mac section of the install docs?

$ opam config report
# opam config report
# opam-version      2.0.0
# self-upgrade      no
# system            arch=x86_64 os=macos os-distribution=homebrew os-version=10.13.6
# solver            builtin-mccs+glpk
# install-criteria  -removed,-count[version-lag,request],-count[version-lag,changed],-changed
# upgrade-criteria  -removed,-count[version-lag,solution],-new
# jobs              3
# repositories      1 (http), 2 (version-controlled) (default repo at 3e5ac5b0)
# pinned            1 (git)
# current-switch    /Users/fhsu/work/cool-project

[rjbou]

opam uses internally gpatch only is the os is an {Open,Free}BSD. Does Mac OS X aliases patch to gpatch once installed ?

[feihong]

@rjbou yes, running brew install gpatch installs gpatch to /usr/local/bin/patch and which patch returns /usr/local/bin/patch

[rjbou]

Doc updated, thanks for the report!

[fpottier]

I would like to note that I just observed a similar issue under MacOS 10.15.7, where patch is gpatch 2.5.8, and the issue was resolved by upgrading to gpatch 2.7.6.

[dra27]

macOS is rapidly becoming the new Windows for shipping with tediously ancient versions of tools (similar recurrent pain in OCaml with GNU make on macOS). Thanks for the data point - I'm hoping that opam update in 2.2 will not involve patch files, but the patch pre-processor may need to be battle-tested on some even older versions of patch!