diff Makefile @ 32576:501d48bda912 stable

zsh_completion: install as _hg not hg

The contrib/zsh_completion file itself says to name it _hg.

With a name like `hg`, if the user has a line like `autoload ${^fpath}/*(N-.:t)`
in their zshrc, it will create a shell function named `hg` that will hide the
actual hg command and make hg unusable.

Separately from that though, the underscore prefix makes it actually work. The
zsh man page states:

    The convention for autoloaded functions used in completion is that they
    start with an underscore

This does not seem to just be a "convention", though. With the ill-advised line
removed from my zshrc and the file named
`/usr/local/share/zsh/site-functions/hg` (without the underscore), these
completions did not seem to get loaded and the ones from the zsh installation
were loaded instead.  If I renamed them to be
`/usr/local/share/zsh/site-functions/_hg`, however, they were loaded.

I manually tested the above statement by starting a new zsh instance with the
file in `/usr/local/share/zsh/site-functions` with the following names:
- As `hg`, `which _hg_labels` did not show anything
- As `_hg`, `which _hg_labels` showed the expected function.

--- a/Makefile	Fri May 26 20:03:05 2017 -0400
+++ b/Makefile	Fri May 26 13:24:07 2017 -0700
@@ -170,7 +170,7 @@
         # install zsh completions - this location appears to be
         # searched by default as of macOS Sierra.
 	install -d build/mercurial/usr/local/share/zsh/site-functions/
-	install -m 0644 contrib/zsh_completion build/mercurial/usr/local/share/zsh/site-functions/hg
+	install -m 0644 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