Rather than parse options manually, which is both difficult to
read and error prone, parse options supplied to commit-tree
using the parse-options api.
It was discovered that the --no-gpg-sign option was documented
but not implemented in commit 70ddbd7767 (commit-tree: add missing
--gpg-sign flag, 2019-01-19), and the existing implementation
would attempt to translate the option as a tree oid. It was also
suggested earlier in commit 55ca3f99ae (commit-tree: add and document
--no-gpg-sign, 2013-12-13) that commit-tree should be migrated to
utilize the parse-options api, which could help prevent mistakes
like this in the future. Hence this change.
Signed-off-by: Brandon Richardson <brandon1024.br@xxxxxxxxx>
---
Notes:
GitHub Pull Request: https://github.com/brandon1024/git/pull/3
Travis CI Build: https://travis-ci.com/brandon1024/git/builds/102953064
Documentation/git-commit-tree.txt | 8 +-
builtin/commit-tree.c | 159 ++++++++++++++++--------------
parse-options.h | 11 +++
3 files changed, 104 insertions(+), 74 deletions(-)
diff --git a/Documentation/git-commit-tree.txt b/Documentation/git-commit-tree.txt
index 002dae625e..f4e20b62a0 100644
--- a/Documentation/git-commit-tree.txt
+++ b/Documentation/git-commit-tree.txt
@@ -23,6 +23,9 @@ Creates a new commit object based on the provided tree object and
emits the new commit object id on stdout. The log message is read
from the standard input, unless `-m` or `-F` options are given.
+When mixing `-m` and `-F` options, the commit log message will be
+composed in the order in which the options are given.
+
A commit object may have any number of parents. With exactly one
parent, it is an ordinary commit. Having more than one parent makes
the commit a merge between several lines of history. Initial (root)
@@ -41,7 +44,7 @@ state was.
OPTIONS
-------
<tree>::
- An existing tree object
+ An existing tree object.
-p <parent>::
Each `-p` indicates the id of a parent commit object.
@@ -52,7 +55,8 @@ OPTIONS
-F <file>::
Read the commit log message from the given file. Use `-` to read
- from the standard input.
+ from the standard input. This can be given more than once and the
+ content of each file becomes its own paragraph.
-S[<keyid>]::
--gpg-sign[=<keyid>]::
diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 12cc403bd7..d4a911acf5 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -12,8 +12,14 @@
#include "builtin.h"
#include "utf8.h"
#include "gpg-interface.h"
+#include "parse-options.h"
+#include "string-list.h"
-static const char commit_tree_usage[] = "git commit-tree [(-p <sha1>)...] [-S[<keyid>]] [-m <message>] [-F <file>] <sha1>";
+static const char * const commit_tree_usage[] = {
+ N_("git commit-tree [(-p <parent>)...] [-S[<keyid>]] [(-m <message>)...] "
+ "[(-F <file>)...] <tree>"),
+ NULL
+};
static const char *sign_commit;
@@ -23,7 +29,7 @@ static void new_parent(struct commit *parent, struct commit_list **parents_p)
struct commit_list *parents;
for (parents = *parents_p; parents; parents = parents->next) {
if (parents->item == parent) {
- error("duplicate parent %s ignored", oid_to_hex(oid));
+ error(_("duplicate parent %s ignored"), oid_to_hex(oid));
return;
}
parents_p = &parents->next;
@@ -39,91 +45,100 @@ static int commit_tree_config(const char *var, const char *value, void *cb)
return git_default_config(var, value, cb);
}
+static int parse_parent_arg_callback(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct object_id oid;
+ struct commit_list **parents = opt->value;
+
+ BUG_ON_OPT_NEG_NOARG(unset, arg);
+
+ if (get_oid_commit(arg, &oid))
+ die(_("not a valid object name %s"), arg);
+
+ assert_oid_type(&oid, OBJ_COMMIT);
+ new_parent(lookup_commit(the_repository, &oid), parents);
+ return 0;
+}
+
+static int parse_message_arg_callback(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct strbuf *buf = opt->value;
+
+ BUG_ON_OPT_NEG_NOARG(unset, arg);
+
+ if (buf->len)
+ strbuf_addch(buf, '\n');
+ strbuf_addstr(buf, arg);
+ strbuf_complete_line(buf);
+
+ return 0;
+}
+
+static int parse_file_arg_callback(const struct option *opt,
+ const char *arg, int unset)
+{
+ int fd;
+ struct strbuf *buf = opt->value;
+
+ BUG_ON_OPT_NEG_NOARG(unset, arg);
+
+ if (buf->len)
+ strbuf_addch(buf, '\n');
+ if (!strcmp(arg, "-"))
+ fd = 0;
+ else {
+ fd = open(arg, O_RDONLY);
+ if (fd < 0)
+ die_errno(_("git commit-tree: failed to open '%s'"), arg);
+ }
+ if (strbuf_read(buf, fd, 0) < 0)
+ die_errno(_("git commit-tree: failed to read '%s'"), arg);
+ if (fd && close(fd))
+ die_errno(_("git commit-tree: failed to close '%s'"), arg);
+
+ return 0;
+}
+
int cmd_commit_tree(int argc, const char **argv, const char *prefix)
{
- int i, got_tree = 0;
+ static struct strbuf buffer = STRBUF_INIT;
struct commit_list *parents = NULL;
struct object_id tree_oid;
struct object_id commit_oid;
- struct strbuf buffer = STRBUF_INIT;
+
+ struct option options[] = {
+ { OPTION_CALLBACK, 'p', NULL, &parents, N_("parent"),
+ N_("id of a parent commit object"), PARSE_OPT_NONEG,
+ parse_parent_arg_callback },
+ { OPTION_CALLBACK, 'm', NULL, &buffer, N_("message"),
+ N_("commit message"), PARSE_OPT_NONEG,
+ parse_message_arg_callback },
+ { OPTION_CALLBACK, 'F', NULL, &buffer, N_("file"),
+ N_("read commit log message from file"), PARSE_OPT_NONEG,
+ parse_file_arg_callback },
+ { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
+ N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
+ OPT_END()
+ };
git_config(commit_tree_config, NULL);
if (argc < 2 || !strcmp(argv[1], "-h"))
- usage(commit_tree_usage);
-
- for (i = 1; i < argc; i++) {
- const char *arg = argv[i];
- if (!strcmp(arg, "-p")) {
- struct object_id oid;
- if (argc <= ++i)
- usage(commit_tree_usage);
- if (get_oid_commit(argv[i], &oid))
- die("Not a valid object name %s", argv[i]);
- assert_oid_type(&oid, OBJ_COMMIT);
- new_parent(lookup_commit(the_repository, &oid),
- &parents);
- continue;
- }
+ usage_with_options(commit_tree_usage, options);
- if (!strcmp(arg, "--gpg-sign")) {
- sign_commit = "";
- continue;
- }
+ argc = parse_options(argc, argv, prefix, options, commit_tree_usage, 0);
- if (skip_prefix(arg, "-S", &sign_commit) ||
- skip_prefix(arg, "--gpg-sign=", &sign_commit))
- continue;
+ if (argc != 1)
+ die(_("must give exactly one tree"));
- if (!strcmp(arg, "--no-gpg-sign")) {
- sign_commit = NULL;
- continue;
- }
-
- if (!strcmp(arg, "-m")) {
- if (argc <= ++i)
- usage(commit_tree_usage);
- if (buffer.len)
- strbuf_addch(&buffer, '\n');
- strbuf_addstr(&buffer, argv[i]);
- strbuf_complete_line(&buffer);
- continue;
- }
-
- if (!strcmp(arg, "-F")) {
- int fd;
-
- if (argc <= ++i)
- usage(commit_tree_usage);
- if (buffer.len)
- strbuf_addch(&buffer, '\n');
- if (!strcmp(argv[i], "-"))
- fd = 0;
- else {
- fd = open(argv[i], O_RDONLY);
- if (fd < 0)
- die_errno("git commit-tree: failed to open '%s'",
- argv[i]);
- }
- if (strbuf_read(&buffer, fd, 0) < 0)
- die_errno("git commit-tree: failed to read '%s'",
- argv[i]);
- if (fd && close(fd))
- die_errno("git commit-tree: failed to close '%s'",
- argv[i]);
- continue;
- }
-
- if (get_oid_tree(arg, &tree_oid))
- die("Not a valid object name %s", arg);
- if (got_tree)
- die("Cannot give more than one trees");
- got_tree = 1;
- }
+ if (get_oid_tree(argv[0], &tree_oid))
+ die(_("not a valid object name %s"), argv[0]);
if (!buffer.len) {
if (strbuf_read(&buffer, 0, 0) < 0)
- die_errno("git commit-tree: failed to read");
+ die_errno(_("git commit-tree: failed to read"));
}
if (commit_tree(buffer.buf, buffer.len, &tree_oid, parents, &commit_oid,
diff --git a/parse-options.h b/parse-options.h
index 14fe32428e..3a442eee26 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -202,6 +202,17 @@ const char *optname(const struct option *opt, int flags);
BUG("option callback does not expect an argument"); \
} while (0)
+/*
+ * Similar to the assertions above, but checks that "arg" is always non-NULL.
+ * This assertion also implies BUG_ON_OPT_NEG(), letting you declare both
+ * assertions in a single line.
+ */
+#define BUG_ON_OPT_NEG_NOARG(unset, arg) do { \
+ BUG_ON_OPT_NEG(unset); \
+ if(!(arg)) \
+ BUG("option callback expects an argument"); \
+} while(0)
+
/*----- incremental advanced APIs -----*/
enum {
--
2.21.0
