Merge branch 'brodock/fix-heimdal-homebrew' into 'main'

Fix CGO_CFLAGS to use output from `brew --prefix`

Closes gitlab-development-kit#1790

See merge request https://gitlab.com/gitlab-org/gitlab-shell/-/merge_requests/724



Merged-by: Ash McKenzie <amckenzie@gitlab.com>
Approved-by: Ash McKenzie <amckenzie@gitlab.com>
Approved-by: Alejandro Rodríguez <alejandro@gitlab.com>
Co-authored-by: Gabriel Mazetto <gabriel@gitlab.com>

Makefile

@@ -22,8 +22,10 @@ ifeq (${FIPS_MODE}, 1)
 endif
 
 ifeq (${OS}, Darwin) # Mac OS
+    BREW_PREFIX := $(shell brew --prefix 2>/dev/null || echo "/opt/homebrew")
+
     # To be able to compile gssapi library
-    export CGO_CFLAGS="-I/opt/homebrew/opt/heimdal/include"
+    export CGO_CFLAGS="-I$(BREW_PREFIX)/opt/heimdal/include"
 endif
 
 GOBUILD_FLAGS := -ldflags "-X main.Version=$(VERSION_STRING) -X main.BuildTime=$(BUILD_TIME)" -tags "$(BUILD_TAGS)" -mod=mod