[PATCH 3/4] Makefile: match shell scripts in FIND_SOURCE_FILES

[Jeff King <peff@peff.net>]

We feed FIND_SOURCE_FILES to ctags to help developers
navigate to particular functions, but we only feed C source
code. The same feature can be helpful when working with
shell scripts (especially the test suite). Modern versions
of ctags know how to parse shell scripts; we just need to
feed the filenames to it.

This patch specifically avoids including the individual test
scripts themselves. Those are unlikely to be of interest,
and there are a lot of them to process. It does pick up
test-lib.sh and test-lib-functions.sh.

Note that our negative pathspec already excludes the
individual scripts for the ls-files case, but we need to
loosen the `find` rule to match it.

Signed-off-by: Jeff King <peff@peff.net>
---
Maybe people would find this annoying. It does increase the number of
entries in the tags file. I've been running something like it for a few
months and have found it useful.

It's also possible that some people have a version of ctags or etags
that doesn't handle shell scripts. I imagine few enough people actually
run "make tags" in the first place that we can probably try it and see.

 Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 001126931..ef8de4a75 100644
--- a/Makefile
+++ b/Makefile
@@ -2152,14 +2152,16 @@ po/build/locale/%/LC_MESSAGES/git.mo: po/%.po
 FIND_SOURCE_FILES = ( \
 	git ls-files \
 		'*.[hcS]' \
+		'*.sh' \
 		':!*[tp][0-9][0-9][0-9][0-9]*' \
 		2>/dev/null || \
 	$(FIND) . \
 		\( -name .git -type d -prune \) \
-		-o \( -name '[tp][0-9][0-9][0-9][0-9]' -type d -prune \) \
+		-o \( -name '[tp][0-9][0-9][0-9][0-9]*' -prune \) \
 		-o \( -name build -type d -prune \) \
 		-o \( -name 'trash*' -type d -prune \) \
 		-o \( -name '*.[hcS]' -type f -print \) \
+		-o \( -name '*.sh' -type f -print \) \
 	)
 
 $(ETAGS_TARGET): FORCE
-- 
2.11.0.341.g202cd3142