Code

branch: don't assume the merge filter ref exists
[git.git] / builtin / fmt-merge-msg.c
index 9d524000b5ba4d9c7566edd5756b68d728ec362b..7e2f22589dcb14d5ba95ce1331ef816a458533d0 100644 (file)
@@ -4,78 +4,43 @@
 #include "diff.h"
 #include "revision.h"
 #include "tag.h"
+#include "string-list.h"
 
 static const char * const fmt_merge_msg_usage[] = {
-       "git fmt-merge-msg [--log|--no-log] [--file <file>]",
+       "git fmt-merge-msg [-m <message>] [--log[=<n>]|--no-log] [--file <file>]",
        NULL
 };
 
-static int merge_summary;
+static int shortlog_len;
 
 static int fmt_merge_msg_config(const char *key, const char *value, void *cb)
 {
-       static int found_merge_log = 0;
-       if (!strcmp("merge.log", key)) {
-               found_merge_log = 1;
-               merge_summary = git_config_bool(key, value);
+       if (!strcmp(key, "merge.log") || !strcmp(key, "merge.summary")) {
+               int is_bool;
+               shortlog_len = git_config_bool_or_int(key, value, &is_bool);
+               if (!is_bool && shortlog_len < 0)
+                       return error("%s: negative length %s", key, value);
+               if (is_bool && shortlog_len)
+                       shortlog_len = DEFAULT_MERGE_LOG_LEN;
        }
-       if (!found_merge_log && !strcmp("merge.summary", key))
-               merge_summary = git_config_bool(key, value);
        return 0;
 }
 
-struct list {
-       char **list;
-       void **payload;
-       unsigned nr, alloc;
+struct src_data {
+       struct string_list branch, tag, r_branch, generic;
+       int head_status;
 };
 
-static void append_to_list(struct list *list, char *value, void *payload)
+static void init_src_data(struct src_data *data)
 {
-       if (list->nr == list->alloc) {
-               list->alloc += 32;
-               list->list = xrealloc(list->list, sizeof(char *) * list->alloc);
-               list->payload = xrealloc(list->payload,
-                               sizeof(char *) * list->alloc);
-       }
-       list->payload[list->nr] = payload;
-       list->list[list->nr++] = value;
+       data->branch.strdup_strings = 1;
+       data->tag.strdup_strings = 1;
+       data->r_branch.strdup_strings = 1;
+       data->generic.strdup_strings = 1;
 }
 
-static int find_in_list(struct list *list, char *value)
-{
-       int i;
-
-       for (i = 0; i < list->nr; i++)
-               if (!strcmp(list->list[i], value))
-                       return i;
-
-       return -1;
-}
-
-static void free_list(struct list *list)
-{
-       int i;
-
-       if (list->alloc == 0)
-               return;
-
-       for (i = 0; i < list->nr; i++) {
-               free(list->list[i]);
-               free(list->payload[i]);
-       }
-       free(list->list);
-       free(list->payload);
-       list->nr = list->alloc = 0;
-}
-
-struct src_data {
-       struct list branch, tag, r_branch, generic;
-       int head_status;
-};
-
-static struct list srcs = { NULL, NULL, 0, 0};
-static struct list origins = { NULL, NULL, 0, 0};
+static struct string_list srcs = STRING_LIST_INIT_DUP;
+static struct string_list origins = STRING_LIST_INIT_DUP;
 
 static int handle_line(char *line)
 {
@@ -83,6 +48,7 @@ static int handle_line(char *line)
        unsigned char *sha1;
        char *src, *origin;
        struct src_data *src_data;
+       struct string_list_item *item;
        int pulling_head = 0;
 
        if (len < 43 || line[40] != '\t')
@@ -115,64 +81,62 @@ static int handle_line(char *line)
                pulling_head = 1;
        }
 
-       i = find_in_list(&srcs, src);
-       if (i < 0) {
-               i = srcs.nr;
-               append_to_list(&srcs, xstrdup(src),
-                               xcalloc(1, sizeof(struct src_data)));
+       item = unsorted_string_list_lookup(&srcs, src);
+       if (!item) {
+               item = string_list_append(&srcs, src);
+               item->util = xcalloc(1, sizeof(struct src_data));
+               init_src_data(item->util);
        }
-       src_data = srcs.payload[i];
+       src_data = item->util;
 
        if (pulling_head) {
-               origin = xstrdup(src);
+               origin = src;
                src_data->head_status |= 1;
        } else if (!prefixcmp(line, "branch ")) {
-               origin = xstrdup(line + 7);
-               append_to_list(&src_data->branch, origin, NULL);
+               origin = line + 7;
+               string_list_append(&src_data->branch, origin);
                src_data->head_status |= 2;
        } else if (!prefixcmp(line, "tag ")) {
                origin = line;
-               append_to_list(&src_data->tag, xstrdup(origin + 4), NULL);
+               string_list_append(&src_data->tag, origin + 4);
                src_data->head_status |= 2;
-       } else if (!prefixcmp(line, "remote branch ")) {
-               origin = xstrdup(line + 14);
-               append_to_list(&src_data->r_branch, origin, NULL);
+       } else if (!prefixcmp(line, "remote-tracking branch ")) {
+               origin = line + strlen("remote-tracking branch ");
+               string_list_append(&src_data->r_branch, origin);
                src_data->head_status |= 2;
        } else {
-               origin = xstrdup(src);
-               append_to_list(&src_data->generic, xstrdup(line), NULL);
+               origin = src;
+               string_list_append(&src_data->generic, line);
                src_data->head_status |= 2;
        }
 
        if (!strcmp(".", src) || !strcmp(src, origin)) {
                int len = strlen(origin);
-               if (origin[0] == '\'' && origin[len - 1] == '\'') {
+               if (origin[0] == '\'' && origin[len - 1] == '\'')
                        origin = xmemdupz(origin + 1, len - 2);
-               } else {
-                       origin = xstrdup(origin);
-               }
        } else {
                char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
                sprintf(new_origin, "%s of %s", origin, src);
                origin = new_origin;
        }
-       append_to_list(&origins, origin, sha1);
+       string_list_append(&origins, origin)->util = sha1;
        return 0;
 }
 
 static void print_joined(const char *singular, const char *plural,
-               struct list *list, struct strbuf *out)
+               struct string_list *list, struct strbuf *out)
 {
        if (list->nr == 0)
                return;
        if (list->nr == 1) {
-               strbuf_addf(out, "%s%s", singular, list->list[0]);
+               strbuf_addf(out, "%s%s", singular, list->items[0].string);
        } else {
                int i;
                strbuf_addstr(out, plural);
                for (i = 0; i < list->nr - 1; i++)
-                       strbuf_addf(out, "%s%s", i > 0 ? ", " : "", list->list[i]);
-               strbuf_addf(out, " and %s", list->list[list->nr - 1]);
+                       strbuf_addf(out, "%s%s", i > 0 ? ", " : "",
+                                   list->items[i].string);
+               strbuf_addf(out, " and %s", list->items[list->nr - 1].string);
        }
 }
 
@@ -183,8 +147,9 @@ static void shortlog(const char *name, unsigned char *sha1,
        int i, count = 0;
        struct commit *commit;
        struct object *branch;
-       struct list subjects = { NULL, NULL, 0, 0 };
+       struct string_list subjects = STRING_LIST_INIT_DUP;
        int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
+       struct strbuf sb = STRBUF_INIT;
 
        branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
        if (!branch || branch->type != OBJ_COMMIT)
@@ -198,7 +163,7 @@ static void shortlog(const char *name, unsigned char *sha1,
        if (prepare_revision_walk(rev))
                die("revision walk setup failed");
        while ((commit = get_revision(rev)) != NULL) {
-               char *oneline, *bol, *eol;
+               struct pretty_print_context ctx = {0};
 
                /* ignore merges */
                if (commit->parents && commit->parents->next)
@@ -208,30 +173,14 @@ static void shortlog(const char *name, unsigned char *sha1,
                if (subjects.nr > limit)
                        continue;
 
-               bol = strstr(commit->buffer, "\n\n");
-               if (bol) {
-                       unsigned char c;
-                       do {
-                               c = *++bol;
-                       } while (isspace(c));
-                       if (!c)
-                               bol = NULL;
-               }
-
-               if (!bol) {
-                       append_to_list(&subjects, xstrdup(sha1_to_hex(
-                                                       commit->object.sha1)),
-                                       NULL);
-                       continue;
-               }
+               format_commit_message(commit, "%s", &sb, &ctx);
+               strbuf_ltrim(&sb);
 
-               eol = strchr(bol, '\n');
-               if (eol) {
-                       oneline = xmemdupz(bol, eol - bol);
-               } else {
-                       oneline = xstrdup(bol);
-               }
-               append_to_list(&subjects, oneline, NULL);
+               if (!sb.len)
+                       string_list_append(&subjects,
+                                          sha1_to_hex(commit->object.sha1));
+               else
+                       string_list_append(&subjects, strbuf_detach(&sb, NULL));
        }
 
        if (count > limit)
@@ -243,7 +192,7 @@ static void shortlog(const char *name, unsigned char *sha1,
                if (i >= limit)
                        strbuf_addf(out, "  ...\n");
                else
-                       strbuf_addf(out, "  %s\n", subjects.list[i]);
+                       strbuf_addf(out, "  %s\n", subjects.items[i].string);
 
        clear_commit_marks((struct commit *)branch, flags);
        clear_commit_marks(head, flags);
@@ -251,46 +200,24 @@ static void shortlog(const char *name, unsigned char *sha1,
        rev->commits = NULL;
        rev->pending.nr = 0;
 
-       free_list(&subjects);
+       string_list_clear(&subjects, 0);
 }
 
-int fmt_merge_msg(int merge_summary, struct strbuf *in, struct strbuf *out) {
-       int limit = 20, i = 0, pos = 0;
+static void do_fmt_merge_msg_title(struct strbuf *out,
+       const char *current_branch) {
+       int i = 0;
        char *sep = "";
-       unsigned char head_sha1[20];
-       const char *current_branch;
-
-       /* get current branch */
-       current_branch = resolve_ref("HEAD", head_sha1, 1, NULL);
-       if (!current_branch)
-               die("No current branch");
-       if (!prefixcmp(current_branch, "refs/heads/"))
-               current_branch += 11;
-
-       /* get a line */
-       while (pos < in->len) {
-               int len;
-               char *newline, *p = in->buf + pos;
-
-               newline = strchr(p, '\n');
-               len = newline ? newline - p : strlen(p);
-               pos += len + !!newline;
-               i++;
-               p[len] = 0;
-               if (handle_line(p))
-                       die ("Error in line %d: %.*s", i, len, p);
-       }
 
        strbuf_addstr(out, "Merge ");
        for (i = 0; i < srcs.nr; i++) {
-               struct src_data *src_data = srcs.payload[i];
+               struct src_data *src_data = srcs.items[i].util;
                const char *subsep = "";
 
                strbuf_addstr(out, sep);
                sep = "; ";
 
                if (src_data->head_status == 1) {
-                       strbuf_addstr(out, srcs.list[i]);
+                       strbuf_addstr(out, srcs.items[i].string);
                        continue;
                }
                if (src_data->head_status == 3) {
@@ -306,7 +233,7 @@ int fmt_merge_msg(int merge_summary, struct strbuf *in, struct strbuf *out) {
                if (src_data->r_branch.nr) {
                        strbuf_addstr(out, subsep);
                        subsep = ", ";
-                       print_joined("remote branch ", "remote branches ",
+                       print_joined("remote-tracking branch ", "remote-tracking branches ",
                                        &src_data->r_branch, out);
                }
                if (src_data->tag.nr) {
@@ -319,38 +246,88 @@ int fmt_merge_msg(int merge_summary, struct strbuf *in, struct strbuf *out) {
                        print_joined("commit ", "commits ", &src_data->generic,
                                        out);
                }
-               if (strcmp(".", srcs.list[i]))
-                       strbuf_addf(out, " of %s", srcs.list[i]);
+               if (strcmp(".", srcs.items[i].string))
+                       strbuf_addf(out, " of %s", srcs.items[i].string);
        }
 
        if (!strcmp("master", current_branch))
                strbuf_addch(out, '\n');
        else
                strbuf_addf(out, " into %s\n", current_branch);
+}
+
+static int do_fmt_merge_msg(int merge_title, struct strbuf *in,
+       struct strbuf *out, int shortlog_len) {
+       int i = 0, pos = 0;
+       unsigned char head_sha1[20];
+       const char *current_branch;
+
+       /* get current branch */
+       current_branch = resolve_ref("HEAD", head_sha1, 1, NULL);
+       if (!current_branch)
+               die("No current branch");
+       if (!prefixcmp(current_branch, "refs/heads/"))
+               current_branch += 11;
+
+       /* get a line */
+       while (pos < in->len) {
+               int len;
+               char *newline, *p = in->buf + pos;
+
+               newline = strchr(p, '\n');
+               len = newline ? newline - p : strlen(p);
+               pos += len + !!newline;
+               i++;
+               p[len] = 0;
+               if (handle_line(p))
+                       die ("Error in line %d: %.*s", i, len, p);
+       }
 
-       if (merge_summary) {
+       if (!srcs.nr)
+               return 0;
+
+       if (merge_title)
+               do_fmt_merge_msg_title(out, current_branch);
+
+       if (shortlog_len) {
                struct commit *head;
                struct rev_info rev;
 
-               head = lookup_commit(head_sha1);
+               head = lookup_commit_or_die(head_sha1, "HEAD");
                init_revisions(&rev, NULL);
                rev.commit_format = CMIT_FMT_ONELINE;
                rev.ignore_merges = 1;
                rev.limited = 1;
 
+               if (suffixcmp(out->buf, "\n"))
+                       strbuf_addch(out, '\n');
+
                for (i = 0; i < origins.nr; i++)
-                       shortlog(origins.list[i], origins.payload[i],
-                                       head, &rev, limit, out);
+                       shortlog(origins.items[i].string, origins.items[i].util,
+                                       head, &rev, shortlog_len, out);
        }
        return 0;
 }
 
+int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
+                 int merge_title, int shortlog_len) {
+       return do_fmt_merge_msg(merge_title, in, out, shortlog_len);
+}
+
 int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
 {
        const char *inpath = NULL;
+       const char *message = NULL;
        struct option options[] = {
-               OPT_BOOLEAN(0, "log",     &merge_summary, "populate log with the shortlog"),
-               OPT_BOOLEAN(0, "summary", &merge_summary, "alias for --log"),
+               { OPTION_INTEGER, 0, "log", &shortlog_len, "n",
+                 "populate log with at most <n> entries from shortlog",
+                 PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN },
+               { OPTION_INTEGER, 0, "summary", &shortlog_len, "n",
+                 "alias for --log (deprecated)",
+                 PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL,
+                 DEFAULT_MERGE_LOG_LEN },
+               OPT_STRING('m', "message", &message, "text",
+                       "use <text> as start of message"),
                OPT_FILENAME('F', "file", &inpath, "file to read from"),
                OPT_END()
        };
@@ -364,6 +341,14 @@ int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
                             0);
        if (argc > 0)
                usage_with_options(fmt_merge_msg_usage, options);
+       if (message && !shortlog_len) {
+               char nl = '\n';
+               write_in_full(STDOUT_FILENO, message, strlen(message));
+               write_in_full(STDOUT_FILENO, &nl, 1);
+               return 0;
+       }
+       if (shortlog_len < 0)
+               die("Negative --log=%d", shortlog_len);
 
        if (inpath && strcmp(inpath, "-")) {
                in = fopen(inpath, "r");
@@ -373,7 +358,13 @@ int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
 
        if (strbuf_read(&input, fileno(in), 0) < 0)
                die_errno("could not read input file");
-       ret = fmt_merge_msg(merge_summary, &input, &output);
+
+       if (message)
+               strbuf_addstr(&output, message);
+       ret = fmt_merge_msg(&input, &output,
+                           message ? 0 : 1,
+                           shortlog_len);
+
        if (ret)
                return ret;
        write_in_full(STDOUT_FILENO, output.buf, output.len);