builtin/tag.c: Fix a sparse warning
[gitweb.git] / builtin / tag.c
index 9b6fd95494fd80240f88d49224199b7e621717e4..e377706e6d362792055b5e2a67efc12edd972e52 100644 (file)
 #include "parse-options.h"
 #include "diff.h"
 #include "revision.h"
+#include "gpg-interface.h"
+#include "sha1-array.h"
 
 static const char * const git_tag_usage[] = {
        "git tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]",
        "git tag -d <tagname>...",
-       "git tag -l [-n[<num>]] [<pattern>...]",
+       "git tag -l [-n[<num>]] [--contains <commit>] [--points-at <object>] "
+               "\n\t\t[<pattern>...]",
        "git tag -v <tagname>...",
        NULL
 };
 
-static char signingkey[1000];
-
 struct tag_filter {
        const char **patterns;
        int lines;
        struct commit_list *with_commit;
 };
 
+static struct sha1_array points_at;
+
 static int match_pattern(const char **patterns, const char *ref)
 {
        /* no pattern means match everything */
@@ -42,6 +45,24 @@ static int match_pattern(const char **patterns, const char *ref)
        return 0;
 }
 
+static const unsigned char *match_points_at(const char *refname,
+                                           const unsigned char *sha1)
+{
+       const unsigned char *tagged_sha1 = NULL;
+       struct object *obj;
+
+       if (sha1_array_lookup(&points_at, sha1) >= 0)
+               return sha1;
+       obj = parse_object(sha1);
+       if (!obj)
+               die(_("malformed object at '%s'"), refname);
+       if (obj->type == OBJ_TAG)
+               tagged_sha1 = ((struct tag *)obj)->tagged->sha1;
+       if (tagged_sha1 && sha1_array_lookup(&points_at, tagged_sha1) >= 0)
+               return tagged_sha1;
+       return NULL;
+}
+
 static int in_commit_list(const struct commit_list *want, struct commit *c)
 {
        for (; want; want = want->next)
@@ -106,6 +127,9 @@ static int show_reference(const char *refname, const unsigned char *sha1,
                                return 0;
                }
 
+               if (points_at.nr && !match_points_at(refname, sha1))
+                       return 0;
+
                if (!filter->lines) {
                        printf("%s\n", refname);
                        return 0;
@@ -174,7 +198,7 @@ static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
                        had_error = 1;
                        continue;
                }
-               if (!resolve_ref(ref, sha1, 1, NULL)) {
+               if (read_ref(ref, sha1)) {
                        error(_("tag '%s' not found."), *p);
                        had_error = 1;
                        continue;
@@ -208,83 +232,29 @@ static int verify_tag(const char *name, const char *ref,
 
 static int do_sign(struct strbuf *buffer)
 {
-       struct child_process gpg;
-       const char *args[4];
-       char *bracket;
-       int len;
-       int i, j;
-
-       if (!*signingkey) {
-               if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
-                               sizeof(signingkey)) > sizeof(signingkey) - 1)
-                       return error(_("committer info too long."));
-               bracket = strchr(signingkey, '>');
-               if (bracket)
-                       bracket[1] = '\0';
-       }
-
-       /* When the username signingkey is bad, program could be terminated
-        * because gpg exits without reading and then write gets SIGPIPE. */
-       signal(SIGPIPE, SIG_IGN);
-
-       memset(&gpg, 0, sizeof(gpg));
-       gpg.argv = args;
-       gpg.in = -1;
-       gpg.out = -1;
-       args[0] = "gpg";
-       args[1] = "-bsau";
-       args[2] = signingkey;
-       args[3] = NULL;
-
-       if (start_command(&gpg))
-               return error(_("could not run gpg."));
-
-       if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
-               close(gpg.in);
-               close(gpg.out);
-               finish_command(&gpg);
-               return error(_("gpg did not accept the tag data"));
-       }
-       close(gpg.in);
-       len = strbuf_read(buffer, gpg.out, 1024);
-       close(gpg.out);
-
-       if (finish_command(&gpg) || !len || len < 0)
-               return error(_("gpg failed to sign the tag"));
-
-       /* Strip CR from the line endings, in case we are on Windows. */
-       for (i = j = 0; i < buffer->len; i++)
-               if (buffer->buf[i] != '\r') {
-                       if (i != j)
-                               buffer->buf[j] = buffer->buf[i];
-                       j++;
-               }
-       strbuf_setlen(buffer, j);
-
-       return 0;
+       return sign_buffer(buffer, buffer, get_signing_key());
 }
 
 static const char tag_template[] =
        N_("\n"
        "#\n"
        "# Write a tag message\n"
+       "# Lines starting with '#' will be ignored.\n"
        "#\n");
 
-static void set_signingkey(const char *value)
-{
-       if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
-               die(_("signing key value too long (%.10s...)"), value);
-}
+static const char tag_template_nocleanup[] =
+       N_("\n"
+       "#\n"
+       "# Write a tag message\n"
+       "# Lines starting with '#' will be kept; you may remove them"
+       " yourself if you want to.\n"
+       "#\n");
 
 static int git_tag_config(const char *var, const char *value, void *cb)
 {
-       if (!strcmp(var, "user.signingkey")) {
-               if (!value)
-                       return config_error_nonbool(var);
-               set_signingkey(value);
-               return 0;
-       }
-
+       int status = git_gpg_config(var, value, cb);
+       if (status)
+               return status;
        return git_default_config(var, value, cb);
 }
 
@@ -319,8 +289,18 @@ static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
        return 0;
 }
 
+struct create_tag_options {
+       unsigned int message_given:1;
+       unsigned int sign;
+       enum {
+               CLEANUP_NONE,
+               CLEANUP_SPACE,
+               CLEANUP_ALL
+       } cleanup_mode;
+};
+
 static void create_tag(const unsigned char *object, const char *tag,
-                      struct strbuf *buf, int message, int sign,
+                      struct strbuf *buf, struct create_tag_options *opt,
                       unsigned char *prev, unsigned char *result)
 {
        enum object_type type;
@@ -345,7 +325,7 @@ static void create_tag(const unsigned char *object, const char *tag,
        if (header_len > sizeof(header_buf) - 1)
                die(_("tag header too big."));
 
-       if (!message) {
+       if (!opt->message_given) {
                int fd;
 
                /* write the template message before editing: */
@@ -356,8 +336,12 @@ static void create_tag(const unsigned char *object, const char *tag,
 
                if (!is_null_sha1(prev))
                        write_tag_body(fd, prev);
+               else if (opt->cleanup_mode == CLEANUP_ALL)
+                       write_or_die(fd, _(tag_template),
+                                       strlen(_(tag_template)));
                else
-                       write_or_die(fd, _(tag_template), strlen(_(tag_template)));
+                       write_or_die(fd, _(tag_template_nocleanup),
+                                       strlen(_(tag_template_nocleanup)));
                close(fd);
 
                if (launch_editor(path, buf, NULL)) {
@@ -367,14 +351,15 @@ static void create_tag(const unsigned char *object, const char *tag,
                }
        }
 
-       stripspace(buf, 1);
+       if (opt->cleanup_mode != CLEANUP_NONE)
+               stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 
-       if (!message && !buf->len)
+       if (!opt->message_given && !buf->len)
                die(_("no tag message?"));
 
        strbuf_insert(buf, 0, header_buf, header_len);
 
-       if (build_tag_object(buf, sign, result) < 0) {
+       if (build_tag_object(buf, opt->sign, result) < 0) {
                if (path)
                        fprintf(stderr, _("The tag message has been left in %s\n"),
                                path);
@@ -415,6 +400,23 @@ static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
        return check_refname_format(sb->buf, 0);
 }
 
+static int parse_opt_points_at(const struct option *opt __attribute__((unused)),
+                       const char *arg, int unset)
+{
+       unsigned char sha1[20];
+
+       if (unset) {
+               sha1_array_clear(&points_at);
+               return 0;
+       }
+       if (!arg)
+               return error(_("switch 'points-at' requires an object"));
+       if (get_sha1(arg, sha1))
+               return error(_("malformed object name '%s'"), arg);
+       sha1_array_append(&points_at, sha1);
+       return 0;
+}
+
 int cmd_tag(int argc, const char **argv, const char *prefix)
 {
        struct strbuf buf = STRBUF_INIT;
@@ -422,9 +424,10 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        unsigned char object[20], prev[20];
        const char *object_ref, *tag;
        struct ref_lock *lock;
-
-       int annotate = 0, sign = 0, force = 0, lines = -1,
-               list = 0, delete = 0, verify = 0;
+       struct create_tag_options opt;
+       char *cleanup_arg = NULL;
+       int annotate = 0, force = 0, lines = -1, list = 0,
+               delete = 0, verify = 0;
        const char *msgfile = NULL, *keyid = NULL;
        struct msg_arg msg = { 0, STRBUF_INIT };
        struct commit_list *with_commit = NULL;
@@ -442,7 +445,9 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                OPT_CALLBACK('m', "message", &msg, "message",
                             "tag message", parse_msg_arg),
                OPT_FILENAME('F', "file", &msgfile, "read message from file"),
-               OPT_BOOLEAN('s', "sign", &sign, "annotated and GPG-signed tag"),
+               OPT_BOOLEAN('s', "sign", &opt.sign, "annotated and GPG-signed tag"),
+               OPT_STRING(0, "cleanup", &cleanup_arg, "mode",
+                       "how to strip spaces and #comments from message"),
                OPT_STRING('u', "local-user", &keyid, "key-id",
                                        "use another key to sign the tag"),
                OPT__FORCE(&force, "replace the tag if exists"),
@@ -454,18 +459,24 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                        PARSE_OPT_LASTARG_DEFAULT,
                        parse_opt_with_commit, (intptr_t)"HEAD",
                },
+               {
+                       OPTION_CALLBACK, 0, "points-at", NULL, "object",
+                       "print only tags of the object", 0, parse_opt_points_at
+               },
                OPT_END()
        };
 
        git_config(git_tag_config, NULL);
 
+       memset(&opt, 0, sizeof(opt));
+
        argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 
        if (keyid) {
-               sign = 1;
-               set_signingkey(keyid);
+               opt.sign = 1;
+               set_signing_key(keyid);
        }
-       if (sign)
+       if (opt.sign)
                annotate = 1;
        if (argc == 0 && !(delete || verify))
                list = 1;
@@ -483,6 +494,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                die(_("-n option is only allowed with -l."));
        if (with_commit)
                die(_("--contains option is only allowed with -l."));
+       if (points_at.nr)
+               die(_("--points-at option is only allowed with -l."));
        if (delete)
                return for_each_tag_name(argv, delete_tag);
        if (verify)
@@ -518,14 +531,24 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        if (strbuf_check_tag_ref(&ref, tag))
                die(_("'%s' is not a valid tag name."), tag);
 
-       if (!resolve_ref(ref.buf, prev, 1, NULL))
+       if (read_ref(ref.buf, prev))
                hashclr(prev);
        else if (!force)
                die(_("tag '%s' already exists"), tag);
 
+       opt.message_given = msg.given || msgfile;
+
+       if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
+               opt.cleanup_mode = CLEANUP_ALL;
+       else if (!strcmp(cleanup_arg, "verbatim"))
+               opt.cleanup_mode = CLEANUP_NONE;
+       else if (!strcmp(cleanup_arg, "whitespace"))
+               opt.cleanup_mode = CLEANUP_SPACE;
+       else
+               die(_("Invalid cleanup mode %s"), cleanup_arg);
+
        if (annotate)
-               create_tag(object, tag, &buf, msg.given || msgfile,
-                          sign, prev, object);
+               create_tag(object, tag, &buf, &opt, prev, object);
 
        lock = lock_any_ref_for_update(ref.buf, prev, 0);
        if (!lock)