Merge branch 'jc/line-log-takes-no-pathspec'

"git log -L<range>:<path>" is documented to take no pathspec, but
this was not enforced by the command line option parser, which has
been corrected.

* jc/line-log-takes-no-pathspec:
  log: diagnose -L used with pathspec as an error

builtin/log.c

@@ -206,6 +206,9 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	if (argc > 1)
 		die(_("unrecognized argument: %s"), argv[1]);
 
+	if (rev->line_level_traverse && rev->prune_data.nr)
+		die(_("-L<range>:<file> cannot be used with pathspec"));
+
 	memset(&w, 0, sizeof(w));
 	userformat_find_requirements(NULL, &w);
 

t/t4211-line-log.sh

@@ -8,6 +8,28 @@ test_expect_success 'setup (import history)' '
 	git reset --hard
 '
 
+test_expect_success 'basic command line parsing' '
+	# This may fail due to "no such path a.c in commit", or
+	# "-L is incompatible with pathspec", depending on the
+	# order the error is checked.  Either is acceptable.
+	test_must_fail git log -L1,1:a.c -- a.c &&
+
+	# -L requires there is no pathspec
+	test_must_fail git log -L1,1:b.c -- b.c 2>error &&
+	test_i18ngrep "cannot be used with pathspec" error &&
+
+	# This would fail because --follow wants a single path, but
+	# we may fail due to incompatibility between -L/--follow in
+	# the future.  Either is acceptable.
+	test_must_fail git log -L1,1:b.c --follow &&
+	test_must_fail git log --follow -L1,1:b.c &&
+
+	# This would fail because -L wants no pathspec, but
+	# we may fail due to incompatibility between -L/--follow in
+	# the future.  Either is acceptable.
+	test_must_fail git log --follow -L1,1:b.c -- b.c
+'
+
 canned_test_1 () {
 	test_expect_$1 "$2" "
 		git log $2 >actual &&