Improve and document Ruby support in 'etags'

* lib-src/etags.c (Ruby_suffixes): Add ".ruby".
(Ruby_functions): Support "module" and overloaded operators.
(Ruby_help): Mention "module".

* test/etags/ruby-src/test.rb:
* test/etags/ruby-src/test1.ruby: New files.
* test/etags/Makefile (RBSRC): New tests.
(SRCS): Add ${RBSRC}.
* test/etags/ETAGS.good_1:
* test/etags/ETAGS.good_2:
* test/etags/ETAGS.good_3:
* test/etags/ETAGS.good_4:
* test/etags/ETAGS.good_5:
* test/etags/ETAGS.good_6:
* test/etags/CTAGS.good: Adapt to the new Ruby tests.

* doc/man/etags.1: Mention Ruby support.
* etc/NEWS: Mention Ruby support.

1 files changed, 11 insertions, 7 deletions

diff --git a/lib-src/etags.c b/lib-src/etags.c
index c91cef40bfa..cd49f7199ba 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -724,10 +724,10 @@ static const char Python_help [] =
 generate a tag.";
 
 static const char *Ruby_suffixes [] =
-  { "rb", NULL };
+  { "rb", "ruby", NULL };
 static const char Ruby_help [] =
-  "In Ruby code, 'def' or 'class' at the beginning of a line\n\
-generate a tag.";
+  "In Ruby code, 'def' or 'class' or 'module' at the beginning of\n\
+a line generate a tag.";
 
 /* Can't do the `SCM' or `scm' prefix with a version number. */
 static const char *Scheme_suffixes [] =
@@ -4552,15 +4552,19 @@ Ruby_functions (FILE *inf)
   LOOP_ON_INPUT_LINES (inf, lb, cp)
     {
       cp = skip_spaces (cp);
-      if (LOOKING_AT (cp, "def") || LOOKING_AT (cp, "class"))
+      if (LOOKING_AT (cp, "def")
+          || LOOKING_AT (cp, "class")
+          || LOOKING_AT (cp, "module"))
         {
           char *name = cp;
 
-          while (!notinname (*cp))
+         /* Ruby method names can end in a '='.  Also, operator overloading can
+            define operators whose names include '='.  */
+          while (!notinname (*cp) || *cp == '=')
             cp++;
 
-          make_tag(name, cp -name, true,
-                   lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+          make_tag (name, cp - name, true,
+                    lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
         }
     }
 }