Sometimes code wants to die in a situation where it already has written
an error message. To use the same error code as `die()` we have to open
code the code with a call to `exit(128)` in such cases, which is easy to
get wrong and leaves magical numbers all over our codebase.
Teach `die_message_builtin()` to not print any error when passed a
`NULL` pointer as error string. Like this, such users can now call
`die(NULL)` to achieve the same result without any hardcoded error
codes.
Adapt a couple of builtins to use this new pattern to demonstrate that
there is a need for such a helper.
Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
builtin/am.c | 4 ++--
builtin/checkout.c | 4 ++--
builtin/fetch.c | 2 +-
builtin/submodule--helper.c | 12 ++++++------
usage.c | 2 ++
5 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/builtin/am.c b/builtin/am.c
index e32a3b4c973..a800003340f 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1000,7 +1000,7 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
if (!patch_format) {
fprintf_ln(stderr, _("Patch format detection failed."));
- exit(128);
+ die(NULL);
}
if (mkdir(state->dir, 0777) < 0 && errno != EEXIST)
@@ -1178,7 +1178,7 @@ static void NORETURN die_user_resolve(const struct am_state *state)
strbuf_release(&sb);
}
- exit(128);
+ die(NULL);
}
/**
diff --git a/builtin/checkout.c b/builtin/checkout.c
index d185982f3a6..536192d3456 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -838,7 +838,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
init_tree_desc(&trees[0], &tree->object.oid,
tree->buffer, tree->size);
if (parse_tree(new_tree) < 0)
- exit(128);
+ die(NULL);
tree = new_tree;
init_tree_desc(&trees[1], &tree->object.oid,
tree->buffer, tree->size);
@@ -913,7 +913,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
work,
old_tree);
if (ret < 0)
- exit(128);
+ die(NULL);
ret = reset_tree(new_tree,
opts, 0,
writeout_error, new_branch_info);
diff --git a/builtin/fetch.c b/builtin/fetch.c
index cda6eaf1fd6..b0800ea5829 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -992,7 +992,7 @@ static int update_local_ref(struct ref *ref,
fast_forward = repo_in_merge_bases(the_repository, current,
updated);
if (fast_forward < 0)
- exit(128);
+ die(NULL);
forced_updates_ms += (getnanotime() - t_before) / 1000000;
} else {
fast_forward = 1;
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 53da2116ddf..4255caca579 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -303,7 +303,7 @@ static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
char *displaypath;
if (validate_submodule_path(path) < 0)
- exit(128);
+ die(NULL);
displaypath = get_submodule_displaypath(path, info->prefix,
info->super_prefix);
@@ -643,7 +643,7 @@ static void status_submodule(const char *path, const struct object_id *ce_oid,
};
if (validate_submodule_path(path) < 0)
- exit(128);
+ die(NULL);
if (!submodule_from_path(the_repository, null_oid(the_hash_algo), path))
die(_("no submodule mapping found in .gitmodules for path '%s'"),
@@ -1257,7 +1257,7 @@ static void sync_submodule(const char *path, const char *prefix,
return;
if (validate_submodule_path(path) < 0)
- exit(128);
+ die(NULL);
sub = submodule_from_path(the_repository, null_oid(the_hash_algo), path);
@@ -1402,7 +1402,7 @@ static void deinit_submodule(const char *path, const char *prefix,
char *sub_git_dir = xstrfmt("%s/.git", path);
if (validate_submodule_path(path) < 0)
- exit(128);
+ die(NULL);
sub = submodule_from_path(the_repository, null_oid(the_hash_algo), path);
@@ -1724,7 +1724,7 @@ static int clone_submodule(const struct module_clone_data *clone_data,
char *to_free = NULL;
if (validate_submodule_path(clone_data_path) < 0)
- exit(128);
+ die(NULL);
if (!is_absolute_path(clone_data->path))
clone_data_path = to_free = xstrfmt("%s/%s", repo_get_work_tree(the_repository),
@@ -3524,7 +3524,7 @@ static int module_add(int argc, const char **argv, const char *prefix,
strip_dir_trailing_slashes(add_data.sm_path);
if (validate_submodule_path(add_data.sm_path) < 0)
- exit(128);
+ die(NULL);
die_on_index_match(add_data.sm_path, force);
die_on_repo_without_commits(add_data.sm_path);
diff --git a/usage.c b/usage.c
index 38b46bbbfe7..cd7b57d6446 100644
--- a/usage.c
+++ b/usage.c
@@ -67,6 +67,8 @@ static NORETURN void usage_builtin(const char *err, va_list params)
static void die_message_builtin(const char *err, va_list params)
{
+ if (!err)
+ return;
trace2_cmd_error_va(err, params);
vreportf(_("fatal: "), err, params);
}
--
2.50.0.rc0.604.gd4ff7b7c86.dirty
