log: reject pickaxe options when combined with -L

The previous commit fixed a crash when -G, -S, or --find-object was
used together with -L and rename detection.  However, these options
still have no effect on -L output: line-log uses its own
commit-filtering logic in line_log_filter() and never consults the
pickaxe machinery.  Rather than silently ignoring these options, reject
the combination with a clear error message.

This replaces the known-breakage tests from the previous commit with
tests that verify the rejection for all three options.  A future series
could teach line-log to honor these options and remove this restriction.

Signed-off-by: Michael Montalbo <mmontalbo@gmail.com>

Author: mmontalbo

builtin/log.c

@@ -317,6 +317,10 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	if (rev->line_level_traverse && rev->prune_data.nr)
 		die(_("-L<range>:<file> cannot be used with pathspec"));
 
+	if (rev->line_level_traverse &&
+	    (rev->diffopt.pickaxe_opts & DIFF_PICKAXE_KINDS_MASK))
+		die(_("-L does not yet support -G, -S, or --find-object"));
+
 	memset(&w, 0, sizeof(w));
 	userformat_find_requirements(NULL, &w);
 

t/t4211-line-log.sh

@@ -367,53 +367,19 @@ test_expect_success 'show line-log with graph' '
 	test_cmp expect actual
 '
 
-test_expect_success 'setup for -L with -G/-S/--find-object and a merge with rename' '
-	git checkout --orphan pickaxe-rename &&
-	git reset --hard &&
-
-	echo content >file &&
-	git add file &&
-	git commit -m "add file" &&
-
-	git checkout -b pickaxe-rename-side &&
-	git mv file renamed-file &&
-	git commit -m "rename file" &&
-
-	git checkout pickaxe-rename &&
-	git commit --allow-empty -m "diverge" &&
-	git merge --no-edit pickaxe-rename-side &&
-
-	git mv renamed-file file &&
-	git commit -m "rename back"
-'
-
-test_expect_success '-L -G does not crash with merge and rename' '
-	git log --format="%s" --no-patch -L 1,1:file -G "." >actual
-'
-
-test_expect_success '-L -S does not crash with merge and rename' '
-	git log --format="%s" --no-patch -L 1,1:file -S content >actual
-'
-
-test_expect_success '-L --find-object does not crash with merge and rename' '
-	git log --format="%s" --no-patch -L 1,1:file \
-		--find-object=$(git rev-parse HEAD:file) >actual
-'
-
-test_expect_failure '-L -G should filter commits by pattern' '
-	git log --format="%s" --no-patch -L 1,1:file -G "nomatch" >actual &&
-	test_must_be_empty actual
+test_expect_success '-L with -G is rejected' '
+	test_must_fail git log -L 1,1:a.c -G "pattern" 2>err &&
+	test_grep "does not yet support" err
 '
 
-test_expect_failure '-L -S should filter commits by pattern' '
-	git log --format="%s" --no-patch -L 1,1:file -S "nomatch" >actual &&
-	test_must_be_empty actual
+test_expect_success '-L with -S is rejected' '
+	test_must_fail git log -L 1,1:a.c -S "pattern" 2>err &&
+	test_grep "does not yet support" err
 '
 
-test_expect_failure '-L --find-object should filter commits by object' '
-	git log --format="%s" --no-patch -L 1,1:file \
-		--find-object=$ZERO_OID >actual &&
-	test_must_be_empty actual
+test_expect_success '-L with --find-object is rejected' '
+	test_must_fail git log -L 1,1:a.c --find-object=HEAD 2>err &&
+	test_grep "does not yet support" err
 '
 
 test_done