osx: install bash and zsh completions by default

The zsh location appears to be on the default $fpath for zsh. bash, on
the other hand, appears to have no default location for completion
scripts, so we follow the lead of Apple's Git distribution and select
a semi-arbitrary place in /usr/local for the file.

Makefile

@@ -163,6 +163,16 osx:
 	  --root=build/mercurial/ --prefix=/usr/local/ \
 	  --install-lib=/Library/Python/2.7/site-packages/
 	make -C doc all install DESTDIR="$(PWD)/build/mercurial/"
+        # install zsh completions - this location appears to be
+        # searched by default as of macOS Sierra.
+	mkdir -p build/mercurial/usr/local/share/zsh/site-functions
+	cp contrib/zsh_completion build/mercurial/usr/local/share/zsh/site-functions/hg
+        # install bash completions - there doesn't appear to be a
+        # place that's searched by default for bash, so we'll follow
+        # the lead of Apple's git install and just put it in a
+        # location of our own.
+	mkdir -p build/mercurial/usr/local/hg/contrib
+	cp contrib/bash_completion build/mercurial/usr/local/hg/contrib/hg-completion.bash
 	mkdir -p $${OUTPUTDIR:-dist}
 	HGVER=$$((cat build/mercurial/Library/Python/2.7/site-packages/mercurial/__version__.py; echo 'print(version)') | python) && \
 	OSXVER=$$(sw_vers -productVersion | cut -d. -f1,2) && \

tests/test-mac-packages.t

@@ -25,6 +25,10 Spot-check some randomly selected files:
   ./Library/Python/2.7/site-packages/mercurial/pure/bdiff.py	100644	0/0
   ./Library/Python/2.7/site-packages/mercurial/pure/bdiff.pyc	100644	0/0
   ./Library/Python/2.7/site-packages/mercurial/pure/bdiff.pyo	100644	0/0
+  $ grep zsh/site-functions/hg boms.txt | cut -d '	' -f 1,2,3
+  ./usr/local/share/zsh/site-functions/hg	100640	0/0
+  $ grep hg-completion.bash boms.txt | cut -d '	' -f 1,2,3
+  ./usr/local/hg/contrib/hg-completion.bash	100640	0/0
   $ egrep 'man[15]' boms.txt | cut -d '	' -f 1,2,3
   ./usr/local/share/man/man1	40755	0/0
   ./usr/local/share/man/man1/hg.1	100644	0/0
@@ -40,7 +44,7 Spot-check some randomly selected files:
   ./Library/Python/2.7/site-packages/mercurial/localrepo.py	100644	0/0
   ./Library/Python/2.7/site-packages/mercurial/localrepo.pyc	100644	0/0
   ./Library/Python/2.7/site-packages/mercurial/localrepo.pyo	100644	0/0
-  $ grep '/hg	' boms.txt | cut -d '	' -f 1,2,3
+  $ grep 'bin/hg	' boms.txt | cut -d '	' -f 1,2,3
   ./usr/local/bin/hg	100755	0/0
 
 Make sure the built binary uses the system Python interpreter