Improve missing-program error handling in make_ctags and make_etags.

tglsfdc · tglsfdc · commit 52a301e0d95a · 2019-01-13T13:33:50.000-05:00
If ctags (resp. etags) isn't installed, these scripts naturally fail, but the error messages were less clear than one could wish. It seems worth installing an explicit test to improve that. Nikolay Shaplov, with suggestions from Michael Paquier and Andrew Dunstan Discussion: https://postgr.es/m/2394207.ccz7JgCJsh@x200m
diff --git a/src/tools/make_ctags b/src/tools/make_ctags
@@ -2,6 +2,9 @@
 
 # src/tools/make_ctags
 
+command -v ctags >/dev/null || \
+	{ echo "'ctags' program not found" 1>&2; exit 1; }
+
 trap "rm -f /tmp/$$" 0 1 2 3 15
 rm -f ./tags
 
diff --git a/src/tools/make_etags b/src/tools/make_etags
@@ -2,6 +2,9 @@
 
 # src/tools/make_etags
 
+command -v etags >/dev/null || \
+	{ echo "'etags' program not found" 1>&2; exit 1; }
+
 rm -f ./TAGS
 
 find `pwd`/ -type f -name '*.[chyl]' -print |
