main: fix a bug of handling --tag-relative with no optional argument

Close universal-ctags#2096. Quoted from universal-ctags#2096 reported by @bogdan: Original ctags accepts --tag-relative without an option which universal ctags does not. It leads to incompatibility. Signed-off-by: Masatake YAMATO <yamato@redhat.com>
smr1113 · May 14, 2019 · 00277dc · 00277dc
1 parent c8405be
commit 00277dc
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Showing 3 changed files with 10 additions and 2 deletions.
diff --git a/Tmain/tag-relative-option-no-optarg.d/exit-expected.txt b/Tmain/tag-relative-option-no-optarg.d/exit-expected.txt
@@ -0,0 +1 @@
+0
diff --git a/Tmain/tag-relative-option-no-optarg.d/run.sh b/Tmain/tag-relative-option-no-optarg.d/run.sh
@@ -0,0 +1,7 @@
+# Copyright: 2019 Masatake YAMATO
+# License: GPL-2
+
+CTAGS=$1
+O="--quiet --options=NONE "
+
+${CTAGS} $O --tag-relative --_force-quit=0
diff --git a/main/options.c b/main/options.c
@@ -161,7 +161,7 @@ optionValues Option = {
 	.followLinks = true,
 	.filter = false,
 	.filterTerminator = NULL,
-	.tagRelative = false,
+	.tagRelative = TREL_NO,
 	.printTotals = false,
 	.lineDirectives = false,
 	.printLanguage =false,
@@ -2413,7 +2413,7 @@ static void processTagRelative (
 {
 	if (isFalse (parameter))
 		Option.tagRelative = TREL_NO;
-	else if (isTrue (parameter))
+	else if (isTrue (parameter) || *parameter == '\0')
 		Option.tagRelative = TREL_YES;
 	else if (strcasecmp (parameter, "always") == 0)
 		Option.tagRelative = TREL_ALWAYS;