Andrew's git - gitweb.git/blob - builtin-fmt-merge-msg.c

   1#include "builtin.h"
   2#include "cache.h"
   3#include "commit.h"
   4#include "diff.h"
   5#include "revision.h"
   6#include "tag.h"
   7
   8static const char *fmt_merge_msg_usage =
   9        "git-fmt-merge-msg [--log] [--no-log] [--file <file>]";
  10
  11static int merge_summary;
  12
  13static int fmt_merge_msg_config(const char *key, const char *value)
  14{
  15        static int found_merge_log = 0;
  16        if (!strcmp("merge.log", key)) {
  17                found_merge_log = 1;
  18                merge_summary = git_config_bool(key, value);
  19        }
  20        if (!found_merge_log && !strcmp("merge.summary", key))
  21                merge_summary = git_config_bool(key, value);
  22        return 0;
  23}
  24
  25struct list {
  26        char **list;
  27        void **payload;
  28        unsigned nr, alloc;
  29};
  30
  31static void append_to_list(struct list *list, char *value, void *payload)
  32{
  33        if (list->nr == list->alloc) {
  34                list->alloc += 32;
  35                list->list = xrealloc(list->list, sizeof(char *) * list->alloc);
  36                list->payload = xrealloc(list->payload,
  37                                sizeof(char *) * list->alloc);
  38        }
  39        list->payload[list->nr] = payload;
  40        list->list[list->nr++] = value;
  41}
  42
  43static int find_in_list(struct list *list, char *value)
  44{
  45        int i;
  46
  47        for (i = 0; i < list->nr; i++)
  48                if (!strcmp(list->list[i], value))
  49                        return i;
  50
  51        return -1;
  52}
  53
  54static void free_list(struct list *list)
  55{
  56        int i;
  57
  58        if (list->alloc == 0)
  59                return;
  60
  61        for (i = 0; i < list->nr; i++) {
  62                free(list->list[i]);
  63                free(list->payload[i]);
  64        }
  65        free(list->list);
  66        free(list->payload);
  67        list->nr = list->alloc = 0;
  68}
  69
  70struct src_data {
  71        struct list branch, tag, r_branch, generic;
  72        int head_status;
  73};
  74
  75static struct list srcs = { NULL, NULL, 0, 0};
  76static struct list origins = { NULL, NULL, 0, 0};
  77
  78static int handle_line(char *line)
  79{
  80        int i, len = strlen(line);
  81        unsigned char *sha1;
  82        char *src, *origin;
  83        struct src_data *src_data;
  84        int pulling_head = 0;
  85
  86        if (len < 43 || line[40] != '\t')
  87                return 1;
  88
  89        if (!prefixcmp(line + 41, "not-for-merge"))
  90                return 0;
  91
  92        if (line[41] != '\t')
  93                return 2;
  94
  95        line[40] = 0;
  96        sha1 = xmalloc(20);
  97        i = get_sha1(line, sha1);
  98        line[40] = '\t';
  99        if (i)
 100                return 3;
 101
 102        if (line[len - 1] == '\n')
 103                line[len - 1] = 0;
 104        line += 42;
 105
 106        src = strstr(line, " of ");
 107        if (src) {
 108                *src = 0;
 109                src += 4;
 110                pulling_head = 0;
 111        } else {
 112                src = line;
 113                pulling_head = 1;
 114        }
 115
 116        i = find_in_list(&srcs, src);
 117        if (i < 0) {
 118                i = srcs.nr;
 119                append_to_list(&srcs, xstrdup(src),
 120                                xcalloc(1, sizeof(struct src_data)));
 121        }
 122        src_data = srcs.payload[i];
 123
 124        if (pulling_head) {
 125                origin = xstrdup(src);
 126                src_data->head_status |= 1;
 127        } else if (!prefixcmp(line, "branch ")) {
 128                origin = xstrdup(line + 7);
 129                append_to_list(&src_data->branch, origin, NULL);
 130                src_data->head_status |= 2;
 131        } else if (!prefixcmp(line, "tag ")) {
 132                origin = line;
 133                append_to_list(&src_data->tag, xstrdup(origin + 4), NULL);
 134                src_data->head_status |= 2;
 135        } else if (!prefixcmp(line, "remote branch ")) {
 136                origin = xstrdup(line + 14);
 137                append_to_list(&src_data->r_branch, origin, NULL);
 138                src_data->head_status |= 2;
 139        } else {
 140                origin = xstrdup(src);
 141                append_to_list(&src_data->generic, xstrdup(line), NULL);
 142                src_data->head_status |= 2;
 143        }
 144
 145        if (!strcmp(".", src) || !strcmp(src, origin)) {
 146                int len = strlen(origin);
 147                if (origin[0] == '\'' && origin[len - 1] == '\'') {
 148                        origin = xmemdupz(origin + 1, len - 2);
 149                } else {
 150                        origin = xstrdup(origin);
 151                }
 152        } else {
 153                char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
 154                sprintf(new_origin, "%s of %s", origin, src);
 155                origin = new_origin;
 156        }
 157        append_to_list(&origins, origin, sha1);
 158        return 0;
 159}
 160
 161static void print_joined(const char *singular, const char *plural,
 162                struct list *list)
 163{
 164        if (list->nr == 0)
 165                return;
 166        if (list->nr == 1) {
 167                printf("%s%s", singular, list->list[0]);
 168        } else {
 169                int i;
 170                printf("%s", plural);
 171                for (i = 0; i < list->nr - 1; i++)
 172                        printf("%s%s", i > 0 ? ", " : "", list->list[i]);
 173                printf(" and %s", list->list[list->nr - 1]);
 174        }
 175}
 176
 177static void shortlog(const char *name, unsigned char *sha1,
 178                struct commit *head, struct rev_info *rev, int limit)
 179{
 180        int i, count = 0;
 181        struct commit *commit;
 182        struct object *branch;
 183        struct list subjects = { NULL, NULL, 0, 0 };
 184        int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
 185
 186        branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
 187        if (!branch || branch->type != OBJ_COMMIT)
 188                return;
 189
 190        setup_revisions(0, NULL, rev, NULL);
 191        rev->ignore_merges = 1;
 192        add_pending_object(rev, branch, name);
 193        add_pending_object(rev, &head->object, "^HEAD");
 194        head->object.flags |= UNINTERESTING;
 195        if (prepare_revision_walk(rev))
 196                die("revision walk setup failed");
 197        while ((commit = get_revision(rev)) != NULL) {
 198                char *oneline, *bol, *eol;
 199
 200                /* ignore merges */
 201                if (commit->parents && commit->parents->next)
 202                        continue;
 203
 204                count++;
 205                if (subjects.nr > limit)
 206                        continue;
 207
 208                bol = strstr(commit->buffer, "\n\n");
 209                if (!bol) {
 210                        append_to_list(&subjects, xstrdup(sha1_to_hex(
 211                                                        commit->object.sha1)),
 212                                        NULL);
 213                        continue;
 214                }
 215
 216                bol += 2;
 217                eol = strchr(bol, '\n');
 218                if (eol) {
 219                        oneline = xmemdupz(bol, eol - bol);
 220                } else {
 221                        oneline = xstrdup(bol);
 222                }
 223                append_to_list(&subjects, oneline, NULL);
 224        }
 225
 226        if (count > limit)
 227                printf("\n* %s: (%d commits)\n", name, count);
 228        else
 229                printf("\n* %s:\n", name);
 230
 231        for (i = 0; i < subjects.nr; i++)
 232                if (i >= limit)
 233                        printf("  ...\n");
 234                else
 235                        printf("  %s\n", subjects.list[i]);
 236
 237        clear_commit_marks((struct commit *)branch, flags);
 238        clear_commit_marks(head, flags);
 239        free_commit_list(rev->commits);
 240        rev->commits = NULL;
 241        rev->pending.nr = 0;
 242
 243        free_list(&subjects);
 244}
 245
 246int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
 247{
 248        int limit = 20, i = 0;
 249        char line[1024];
 250        FILE *in = stdin;
 251        const char *sep = "";
 252        unsigned char head_sha1[20];
 253        const char *current_branch;
 254
 255        git_config(fmt_merge_msg_config);
 256
 257        while (argc > 1) {
 258                if (!strcmp(argv[1], "--log") || !strcmp(argv[1], "--summary"))
 259                        merge_summary = 1;
 260                else if (!strcmp(argv[1], "--no-log")
 261                                || !strcmp(argv[1], "--no-summary"))
 262                        merge_summary = 0;
 263                else if (!strcmp(argv[1], "-F") || !strcmp(argv[1], "--file")) {
 264                        if (argc < 3)
 265                                die ("Which file?");
 266                        if (!strcmp(argv[2], "-"))
 267                                in = stdin;
 268                        else {
 269                                fclose(in);
 270                                in = fopen(argv[2], "r");
 271                                if (!in)
 272                                        die("cannot open %s", argv[2]);
 273                        }
 274                        argc--; argv++;
 275                } else
 276                        break;
 277                argc--; argv++;
 278        }
 279
 280        if (argc > 1)
 281                usage(fmt_merge_msg_usage);
 282
 283        /* get current branch */
 284        current_branch = resolve_ref("HEAD", head_sha1, 1, NULL);
 285        if (!current_branch)
 286                die("No current branch");
 287        if (!prefixcmp(current_branch, "refs/heads/"))
 288                current_branch += 11;
 289
 290        while (fgets(line, sizeof(line), in)) {
 291                i++;
 292                if (line[0] == 0)
 293                        continue;
 294                if (handle_line(line))
 295                        die ("Error in line %d: %s", i, line);
 296        }
 297
 298        printf("Merge ");
 299        for (i = 0; i < srcs.nr; i++) {
 300                struct src_data *src_data = srcs.payload[i];
 301                const char *subsep = "";
 302
 303                printf(sep);
 304                sep = "; ";
 305
 306                if (src_data->head_status == 1) {
 307                        printf(srcs.list[i]);
 308                        continue;
 309                }
 310                if (src_data->head_status == 3) {
 311                        subsep = ", ";
 312                        printf("HEAD");
 313                }
 314                if (src_data->branch.nr) {
 315                        printf(subsep);
 316                        subsep = ", ";
 317                        print_joined("branch ", "branches ", &src_data->branch);
 318                }
 319                if (src_data->r_branch.nr) {
 320                        printf(subsep);
 321                        subsep = ", ";
 322                        print_joined("remote branch ", "remote branches ",
 323                                        &src_data->r_branch);
 324                }
 325                if (src_data->tag.nr) {
 326                        printf(subsep);
 327                        subsep = ", ";
 328                        print_joined("tag ", "tags ", &src_data->tag);
 329                }
 330                if (src_data->generic.nr) {
 331                        printf(subsep);
 332                        print_joined("commit ", "commits ", &src_data->generic);
 333                }
 334                if (strcmp(".", srcs.list[i]))
 335                        printf(" of %s", srcs.list[i]);
 336        }
 337
 338        if (!strcmp("master", current_branch))
 339                putchar('\n');
 340        else
 341                printf(" into %s\n", current_branch);
 342
 343        if (merge_summary) {
 344                struct commit *head;
 345                struct rev_info rev;
 346
 347                head = lookup_commit(head_sha1);
 348                init_revisions(&rev, prefix);
 349                rev.commit_format = CMIT_FMT_ONELINE;
 350                rev.ignore_merges = 1;
 351                rev.limited = 1;
 352
 353                for (i = 0; i < origins.nr; i++)
 354                        shortlog(origins.list[i], origins.payload[i],
 355                                        head, &rev, limit);
 356        }
 357
 358        /* No cleanup yet; is standalone anyway */
 359
 360        return 0;
 361}