commit: forbid --pathspec-from-file --all

I forgot this in my previous patch `--pathspec-from-file` for
`git commit` [1]. When both `--pathspec-from-file` and `--all` were
specified, `--all` took precedence and `--pathspec-from-file` was
ignored. Before `--pathspec-from-file` was implemented, this case was
prevented by this check in `parse_and_validate_options()` :

    die(_("paths '%s ...' with -a does not make sense"), argv[0]);

It is unfortunate that these two cases are disconnected. This came as
result of how the code was laid out before my patches, where `pathspec`
is parsed outside of `parse_and_validate_options()`. This branch is
already full of refactoring patches and I did not dare to go for another
one.

Fix by mirroring `die()` for `--pathspec-from-file` as well.

[1] Commit e440fc5 ("commit: support the --pathspec-from-file option" 2019-11-19)

Reported-by: Phillip Wood <[email protected]>
Signed-off-by: Alexandr Miloslavskiy <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: SyntevoAlex

builtin/commit.c

@@ -347,6 +347,9 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
 		if (interactive)
 			die(_("--pathspec-from-file is incompatible with --interactive/--patch"));
 
+		if (all)
+			die(_("--pathspec-from-file with -a does not make sense"));
+
 		if (pathspec.nr)
 			die(_("--pathspec-from-file is incompatible with pathspec arguments"));
 

t/t7526-commit-pathspec-file.sh

@@ -127,4 +127,10 @@ test_expect_success 'only touches what was listed' '
 	verify_expect
 '
 
+test_expect_success '--pathspec-from-file and --all cannot be used together' '
+	restore_checkpoint &&
+	test_must_fail git commit --pathspec-from-file=- --all -m "Commit" 2>err &&
+	test_i18ngrep "[-]-pathspec-from-file with -a does not make sense" err
+'
+
 test_done