blame: rework methods that determine 'final' commit
[gitweb.git] / builtin / am.c
index 1b4829a1f7e5d6fe6bfe5bb741f7b3bc2431df8c..a63935cc83409ef99551a69da79d52ac297fe83a 100644 (file)
@@ -28,6 +28,8 @@
 #include "rerere.h"
 #include "prompt.h"
 #include "mailinfo.h"
+#include "apply.h"
+#include "string-list.h"
 
 /**
  * Returns 1 if the file is empty or does not exist, 0 otherwise.
@@ -132,17 +134,15 @@ struct am_state {
 };
 
 /**
- * Initializes am_state with the default values. The state directory is set to
- * dir.
+ * Initializes am_state with the default values.
  */
-static void am_state_init(struct am_state *state, const char *dir)
+static void am_state_init(struct am_state *state)
 {
        int gpgsign;
 
        memset(state, 0, sizeof(*state));
 
-       assert(dir);
-       state->dir = xstrdup(dir);
+       state->dir = git_pathdup("rebase-apply");
 
        state->prec = 4;
 
@@ -258,38 +258,29 @@ static int read_state_file(struct strbuf *sb, const struct am_state *state,
 }
 
 /**
- * Reads a KEY=VALUE shell variable assignment from `fp`, returning the VALUE
- * as a newly-allocated string. VALUE must be a quoted string, and the KEY must
- * match `key`. Returns NULL on failure.
- *
- * This is used by read_author_script() to read the GIT_AUTHOR_* variables from
- * the author-script.
+ * Take a series of KEY='VALUE' lines where VALUE part is
+ * sq-quoted, and append <KEY, VALUE> at the end of the string list
  */
-static char *read_shell_var(FILE *fp, const char *key)
+static int parse_key_value_squoted(char *buf, struct string_list *list)
 {
-       struct strbuf sb = STRBUF_INIT;
-       const char *str;
-
-       if (strbuf_getline_lf(&sb, fp))
-               goto fail;
-
-       if (!skip_prefix(sb.buf, key, &str))
-               goto fail;
-
-       if (!skip_prefix(str, "=", &str))
-               goto fail;
-
-       strbuf_remove(&sb, 0, str - sb.buf);
-
-       str = sq_dequote(sb.buf);
-       if (!str)
-               goto fail;
-
-       return strbuf_detach(&sb, NULL);
-
-fail:
-       strbuf_release(&sb);
-       return NULL;
+       while (*buf) {
+               struct string_list_item *item;
+               char *np;
+               char *cp = strchr(buf, '=');
+               if (!cp)
+                       return -1;
+               np = strchrnul(cp, '\n');
+               *cp++ = '\0';
+               item = string_list_append(list, buf);
+
+               buf = np + (*np == '\n');
+               *np = '\0';
+               cp = sq_dequote(cp);
+               if (!cp)
+                       return -1;
+               item->util = xstrdup(cp);
+       }
+       return 0;
 }
 
 /**
@@ -311,44 +302,39 @@ static char *read_shell_var(FILE *fp, const char *key)
 static int read_author_script(struct am_state *state)
 {
        const char *filename = am_path(state, "author-script");
-       FILE *fp;
+       struct strbuf buf = STRBUF_INIT;
+       struct string_list kv = STRING_LIST_INIT_DUP;
+       int retval = -1; /* assume failure */
+       int fd;
 
        assert(!state->author_name);
        assert(!state->author_email);
        assert(!state->author_date);
 
-       fp = fopen(filename, "r");
-       if (!fp) {
+       fd = open(filename, O_RDONLY);
+       if (fd < 0) {
                if (errno == ENOENT)
                        return 0;
                die_errno(_("could not open '%s' for reading"), filename);
        }
+       strbuf_read(&buf, fd, 0);
+       close(fd);
+       if (parse_key_value_squoted(buf.buf, &kv))
+               goto finish;
 
-       state->author_name = read_shell_var(fp, "GIT_AUTHOR_NAME");
-       if (!state->author_name) {
-               fclose(fp);
-               return -1;
-       }
-
-       state->author_email = read_shell_var(fp, "GIT_AUTHOR_EMAIL");
-       if (!state->author_email) {
-               fclose(fp);
-               return -1;
-       }
-
-       state->author_date = read_shell_var(fp, "GIT_AUTHOR_DATE");
-       if (!state->author_date) {
-               fclose(fp);
-               return -1;
-       }
-
-       if (fgetc(fp) != EOF) {
-               fclose(fp);
-               return -1;
-       }
-
-       fclose(fp);
-       return 0;
+       if (kv.nr != 3 ||
+           strcmp(kv.items[0].string, "GIT_AUTHOR_NAME") ||
+           strcmp(kv.items[1].string, "GIT_AUTHOR_EMAIL") ||
+           strcmp(kv.items[2].string, "GIT_AUTHOR_DATE"))
+               goto finish;
+       state->author_name = kv.items[0].util;
+       state->author_email = kv.items[1].util;
+       state->author_date = kv.items[2].util;
+       retval = 0;
+finish:
+       string_list_clear(&kv, !!retval);
+       strbuf_release(&buf);
+       return retval;
 }
 
 /**
@@ -774,14 +760,18 @@ static int split_mail_conv(mail_conv_fn fn, struct am_state *state,
                mail = mkpath("%s/%0*d", state->dir, state->prec, i + 1);
 
                out = fopen(mail, "w");
-               if (!out)
+               if (!out) {
+                       if (in != stdin)
+                               fclose(in);
                        return error_errno(_("could not open '%s' for writing"),
                                           mail);
+               }
 
                ret = fn(out, in, keep_cr);
 
                fclose(out);
-               fclose(in);
+               if (in != stdin)
+                       fclose(in);
 
                if (ret)
                        return error(_("could not parse patch '%s'"), *paths);
@@ -889,12 +879,12 @@ static int hg_patch_to_mail(FILE *out, FILE *in, int keep_cr)
                if (skip_prefix(sb.buf, "# User ", &str))
                        fprintf(out, "From: %s\n", str);
                else if (skip_prefix(sb.buf, "# Date ", &str)) {
-                       unsigned long timestamp;
+                       timestamp_t timestamp;
                        long tz, tz2;
                        char *end;
 
                        errno = 0;
-                       timestamp = strtoul(str, &end, 10);
+                       timestamp = parse_timestamp(str, &end, 10);
                        if (errno)
                                return error(_("invalid timestamp"));
 
@@ -1061,7 +1051,7 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
        } else {
                write_state_text(state, "abort-safety", "");
                if (!state->rebasing)
-                       delete_ref("ORIG_HEAD", NULL, 0);
+                       delete_ref(NULL, "ORIG_HEAD", NULL, 0);
        }
 
        /*
@@ -1131,7 +1121,7 @@ static void refresh_and_write_cache(void)
 {
        struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
 
-       hold_locked_index(lock_file, 1);
+       hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
        refresh_cache(REFRESH_QUIET);
        if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
                die(_("unable to write index file"));
@@ -1193,42 +1183,39 @@ static void NORETURN die_user_resolve(const struct am_state *state)
        exit(128);
 }
 
-static void am_signoff(struct strbuf *sb)
+/**
+ * Appends signoff to the "msg" field of the am_state.
+ */
+static void am_append_signoff(struct am_state *state)
 {
        char *cp;
        struct strbuf mine = STRBUF_INIT;
+       struct strbuf sb = STRBUF_INIT;
+
+       strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len);
 
-       /* Does it end with our own sign-off? */
+       /* our sign-off */
        strbuf_addf(&mine, "\n%s%s\n",
                    sign_off_header,
                    fmt_name(getenv("GIT_COMMITTER_NAME"),
                             getenv("GIT_COMMITTER_EMAIL")));
-       if (mine.len < sb->len &&
-           !strcmp(mine.buf, sb->buf + sb->len - mine.len))
+
+       /* Does sb end with it already? */
+       if (mine.len < sb.len &&
+           !strcmp(mine.buf, sb.buf + sb.len - mine.len))
                goto exit; /* no need to duplicate */
 
        /* Does it have any Signed-off-by: in the text */
-       for (cp = sb->buf;
+       for (cp = sb.buf;
             cp && *cp && (cp = strstr(cp, sign_off_header)) != NULL;
             cp = strchr(cp, '\n')) {
-               if (sb->buf == cp || cp[-1] == '\n')
+               if (sb.buf == cp || cp[-1] == '\n')
                        break;
        }
 
-       strbuf_addstr(sb, mine.buf + !!cp);
+       strbuf_addstr(&sb, mine.buf + !!cp);
 exit:
        strbuf_release(&mine);
-}
-
-/**
- * Appends signoff to the "msg" field of the am_state.
- */
-static void am_append_signoff(struct am_state *state)
-{
-       struct strbuf sb = STRBUF_INIT;
-
-       strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len);
-       am_signoff(&sb);
        state->msg = strbuf_detach(&sb, &state->msg_len);
 }
 
@@ -1333,9 +1320,6 @@ static int parse_mail(struct am_state *state, const char *mail)
        strbuf_addbuf(&msg, &mi.log_message);
        strbuf_stripspace(&msg, 0);
 
-       if (state->signoff)
-               am_signoff(&msg);
-
        assert(!state->author_name);
        state->author_name = strbuf_detach(&author_name, NULL);
 
@@ -1388,40 +1372,33 @@ static int get_mail_commit_oid(struct object_id *commit_id, const char *mail)
  */
 static void get_commit_info(struct am_state *state, struct commit *commit)
 {
-       const char *buffer, *ident_line, *author_date, *msg;
+       const char *buffer, *ident_line, *msg;
        size_t ident_len;
-       struct ident_split ident_split;
-       struct strbuf sb = STRBUF_INIT;
+       struct ident_split id;
 
        buffer = logmsg_reencode(commit, NULL, get_commit_output_encoding());
 
        ident_line = find_commit_header(buffer, "author", &ident_len);
 
-       if (split_ident_line(&ident_split, ident_line, ident_len) < 0) {
-               strbuf_add(&sb, ident_line, ident_len);
-               die(_("invalid ident line: %s"), sb.buf);
-       }
+       if (split_ident_line(&id, ident_line, ident_len) < 0)
+               die(_("invalid ident line: %.*s"), (int)ident_len, ident_line);
 
        assert(!state->author_name);
-       if (ident_split.name_begin) {
-               strbuf_add(&sb, ident_split.name_begin,
-                       ident_split.name_end - ident_split.name_begin);
-               state->author_name = strbuf_detach(&sb, NULL);
-       } else
+       if (id.name_begin)
+               state->author_name =
+                       xmemdupz(id.name_begin, id.name_end - id.name_begin);
+       else
                state->author_name = xstrdup("");
 
        assert(!state->author_email);
-       if (ident_split.mail_begin) {
-               strbuf_add(&sb, ident_split.mail_begin,
-                       ident_split.mail_end - ident_split.mail_begin);
-               state->author_email = strbuf_detach(&sb, NULL);
-       } else
+       if (id.mail_begin)
+               state->author_email =
+                       xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);
+       else
                state->author_email = xstrdup("");
 
-       author_date = show_ident_date(&ident_split, DATE_MODE(NORMAL));
-       strbuf_addstr(&sb, author_date);
        assert(!state->author_date);
-       state->author_date = strbuf_detach(&sb, NULL);
+       state->author_date = xstrdup(show_ident_date(&id, DATE_MODE(NORMAL)));
 
        assert(!state->msg);
        msg = strstr(buffer, "\n\n");
@@ -1429,6 +1406,7 @@ static void get_commit_info(struct am_state *state, struct commit *commit)
                die(_("unable to parse commit %s"), oid_to_hex(&commit->object.oid));
        state->msg = xstrdup(msg + 2);
        state->msg_len = strlen(state->msg);
+       unuse_commit_buffer(commit, buffer);
 }
 
 /**
@@ -1522,39 +1500,59 @@ static int parse_mail_rebase(struct am_state *state, const char *mail)
  */
 static int run_apply(const struct am_state *state, const char *index_file)
 {
-       struct child_process cp = CHILD_PROCESS_INIT;
-
-       cp.git_cmd = 1;
-
-       if (index_file)
-               argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s", index_file);
+       struct argv_array apply_paths = ARGV_ARRAY_INIT;
+       struct argv_array apply_opts = ARGV_ARRAY_INIT;
+       struct apply_state apply_state;
+       int res, opts_left;
+       static struct lock_file lock_file;
+       int force_apply = 0;
+       int options = 0;
+
+       if (init_apply_state(&apply_state, NULL, &lock_file))
+               die("BUG: init_apply_state() failed");
+
+       argv_array_push(&apply_opts, "apply");
+       argv_array_pushv(&apply_opts, state->git_apply_opts.argv);
+
+       opts_left = apply_parse_options(apply_opts.argc, apply_opts.argv,
+                                       &apply_state, &force_apply, &options,
+                                       NULL);
+
+       if (opts_left != 0)
+               die("unknown option passed through to git apply");
+
+       if (index_file) {
+               apply_state.index_file = index_file;
+               apply_state.cached = 1;
+       } else
+               apply_state.check_index = 1;
 
        /*
         * If we are allowed to fall back on 3-way merge, don't give false
         * errors during the initial attempt.
         */
-       if (state->threeway && !index_file) {
-               cp.no_stdout = 1;
-               cp.no_stderr = 1;
-       }
+       if (state->threeway && !index_file)
+               apply_state.apply_verbosity = verbosity_silent;
 
-       argv_array_push(&cp.args, "apply");
+       if (check_apply_state(&apply_state, force_apply))
+               die("BUG: check_apply_state() failed");
 
-       argv_array_pushv(&cp.args, state->git_apply_opts.argv);
+       argv_array_push(&apply_paths, am_path(state, "patch"));
 
-       if (index_file)
-               argv_array_push(&cp.args, "--cached");
-       else
-               argv_array_push(&cp.args, "--index");
+       res = apply_all_patches(&apply_state, apply_paths.argc, apply_paths.argv, options);
 
-       argv_array_push(&cp.args, am_path(state, "patch"));
+       argv_array_clear(&apply_paths);
+       argv_array_clear(&apply_opts);
+       clear_apply_state(&apply_state);
 
-       if (run_command(&cp))
-               return -1;
+       if (res)
+               return res;
 
-       /* Reload index as git-apply will have modified it. */
-       discard_cache();
-       read_cache_from(index_file ? index_file : get_index_file());
+       if (index_file) {
+               /* Reload index as apply_all_patches() will have modified it. */
+               discard_cache();
+               read_cache_from(index_file);
+       }
 
        return 0;
 }
@@ -1840,6 +1838,9 @@ static void am_run(struct am_state *state, int resume)
                        if (skip)
                                goto next; /* mail should be skipped */
 
+                       if (state->signoff)
+                               am_append_signoff(state);
+
                        write_author_script(state);
                        write_commit_msg(state);
                }
@@ -1968,7 +1969,7 @@ static int fast_forward_to(struct tree *head, struct tree *remote, int reset)
                return -1;
 
        lock_file = xcalloc(1, sizeof(struct lock_file));
-       hold_locked_index(lock_file, 1);
+       hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
 
        refresh_cache(REFRESH_QUIET);
 
@@ -2008,7 +2009,7 @@ static int merge_tree(struct tree *tree)
                return -1;
 
        lock_file = xcalloc(1, sizeof(struct lock_file));
-       hold_locked_index(lock_file, 1);
+       hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
 
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = 1;
@@ -2116,7 +2117,7 @@ static int safe_to_abort(const struct am_state *state)
 
        if (read_state_file(&sb, state, "abort-safety", 1) > 0) {
                if (get_oid_hex(sb.buf, &abort_safety))
-                       die(_("could not parse %s"), am_path(state, "abort_safety"));
+                       die(_("could not parse %s"), am_path(state, "abort-safety"));
        } else
                oidclr(&abort_safety);
 
@@ -2126,7 +2127,7 @@ static int safe_to_abort(const struct am_state *state)
        if (!oidcmp(&head, &abort_safety))
                return 1;
 
-       error(_("You seem to have moved HEAD since the last 'am' failure.\n"
+       warning(_("You seem to have moved HEAD since the last 'am' failure.\n"
                "Not rewinding to ORIG_HEAD"));
 
        return 0;
@@ -2164,7 +2165,7 @@ static void am_abort(struct am_state *state)
                                has_curr_head ? &curr_head : NULL, 0,
                                UPDATE_REFS_DIE_ON_ERR);
        else if (curr_branch)
-               delete_ref(curr_branch, NULL, REF_NODEREF);
+               delete_ref(NULL, curr_branch, NULL, REF_NODEREF);
 
        free(curr_branch);
        am_destroy(state);
@@ -2222,7 +2223,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
        int in_progress;
 
        const char * const usage[] = {
-               N_("git am [<options>] [(<mbox>|<Maildir>)...]"),
+               N_("git am [<options>] [(<mbox> | <Maildir>)...]"),
                N_("git am [<options>] (--continue | --skip | --abort)"),
                NULL
        };
@@ -2314,7 +2315,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
 
        git_config(git_am_config, NULL);
 
-       am_state_init(&state, git_path("rebase-apply"));
+       am_state_init(&state);
 
        in_progress = am_in_progress(&state);
        if (in_progress)