log-tree.con commit add update 'none' flag to disable update of submodule by default (322bb6e)
   1#include "cache.h"
   2#include "diff.h"
   3#include "commit.h"
   4#include "tag.h"
   5#include "graph.h"
   6#include "log-tree.h"
   7#include "reflog-walk.h"
   8#include "refs.h"
   9#include "string-list.h"
  10#include "color.h"
  11
  12struct decoration name_decoration = { "object names" };
  13
  14enum decoration_type {
  15        DECORATION_NONE = 0,
  16        DECORATION_REF_LOCAL,
  17        DECORATION_REF_REMOTE,
  18        DECORATION_REF_TAG,
  19        DECORATION_REF_STASH,
  20        DECORATION_REF_HEAD,
  21};
  22
  23static char decoration_colors[][COLOR_MAXLEN] = {
  24        GIT_COLOR_RESET,
  25        GIT_COLOR_BOLD_GREEN,   /* REF_LOCAL */
  26        GIT_COLOR_BOLD_RED,     /* REF_REMOTE */
  27        GIT_COLOR_BOLD_YELLOW,  /* REF_TAG */
  28        GIT_COLOR_BOLD_MAGENTA, /* REF_STASH */
  29        GIT_COLOR_BOLD_CYAN,    /* REF_HEAD */
  30};
  31
  32static const char *decorate_get_color(int decorate_use_color, enum decoration_type ix)
  33{
  34        if (decorate_use_color)
  35                return decoration_colors[ix];
  36        return "";
  37}
  38
  39static int parse_decorate_color_slot(const char *slot)
  40{
  41        /*
  42         * We're comparing with 'ignore-case' on
  43         * (because config.c sets them all tolower),
  44         * but let's match the letters in the literal
  45         * string values here with how they are
  46         * documented in Documentation/config.txt, for
  47         * consistency.
  48         *
  49         * We love being consistent, don't we?
  50         */
  51        if (!strcasecmp(slot, "branch"))
  52                return DECORATION_REF_LOCAL;
  53        if (!strcasecmp(slot, "remoteBranch"))
  54                return DECORATION_REF_REMOTE;
  55        if (!strcasecmp(slot, "tag"))
  56                return DECORATION_REF_TAG;
  57        if (!strcasecmp(slot, "stash"))
  58                return DECORATION_REF_STASH;
  59        if (!strcasecmp(slot, "HEAD"))
  60                return DECORATION_REF_HEAD;
  61        return -1;
  62}
  63
  64int parse_decorate_color_config(const char *var, const int ofs, const char *value)
  65{
  66        int slot = parse_decorate_color_slot(var + ofs);
  67        if (slot < 0)
  68                return 0;
  69        if (!value)
  70                return config_error_nonbool(var);
  71        color_parse(value, var, decoration_colors[slot]);
  72        return 0;
  73}
  74
  75/*
  76 * log-tree.c uses DIFF_OPT_TST for determining whether to use color
  77 * for showing the commit sha1, use the same check for --decorate
  78 */
  79#define decorate_get_color_opt(o, ix) \
  80        decorate_get_color(DIFF_OPT_TST((o), COLOR_DIFF), ix)
  81
  82static void add_name_decoration(enum decoration_type type, const char *name, struct object *obj)
  83{
  84        int nlen = strlen(name);
  85        struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + nlen);
  86        memcpy(res->name, name, nlen + 1);
  87        res->type = type;
  88        res->next = add_decoration(&name_decoration, obj, res);
  89}
  90
  91static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
  92{
  93        struct object *obj = parse_object(sha1);
  94        enum decoration_type type = DECORATION_NONE;
  95        if (!obj)
  96                return 0;
  97
  98        if (!prefixcmp(refname, "refs/heads"))
  99                type = DECORATION_REF_LOCAL;
 100        else if (!prefixcmp(refname, "refs/remotes"))
 101                type = DECORATION_REF_REMOTE;
 102        else if (!prefixcmp(refname, "refs/tags"))
 103                type = DECORATION_REF_TAG;
 104        else if (!prefixcmp(refname, "refs/stash"))
 105                type = DECORATION_REF_STASH;
 106        else if (!prefixcmp(refname, "HEAD"))
 107                type = DECORATION_REF_HEAD;
 108
 109        if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
 110                refname = prettify_refname(refname);
 111        add_name_decoration(type, refname, obj);
 112        while (obj->type == OBJ_TAG) {
 113                obj = ((struct tag *)obj)->tagged;
 114                if (!obj)
 115                        break;
 116                add_name_decoration(DECORATION_REF_TAG, refname, obj);
 117        }
 118        return 0;
 119}
 120
 121void load_ref_decorations(int flags)
 122{
 123        static int loaded;
 124        if (!loaded) {
 125                loaded = 1;
 126                for_each_ref(add_ref_decoration, &flags);
 127                head_ref(add_ref_decoration, &flags);
 128        }
 129}
 130
 131static void show_parents(struct commit *commit, int abbrev)
 132{
 133        struct commit_list *p;
 134        for (p = commit->parents; p ; p = p->next) {
 135                struct commit *parent = p->item;
 136                printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
 137        }
 138}
 139
 140void show_decorations(struct rev_info *opt, struct commit *commit)
 141{
 142        const char *prefix;
 143        struct name_decoration *decoration;
 144        const char *color_commit =
 145                diff_get_color_opt(&opt->diffopt, DIFF_COMMIT);
 146        const char *color_reset =
 147                decorate_get_color_opt(&opt->diffopt, DECORATION_NONE);
 148
 149        if (opt->show_source && commit->util)
 150                printf("\t%s", (char *) commit->util);
 151        if (!opt->show_decorations)
 152                return;
 153        decoration = lookup_decoration(&name_decoration, &commit->object);
 154        if (!decoration)
 155                return;
 156        prefix = " (";
 157        while (decoration) {
 158                printf("%s", prefix);
 159                fputs(decorate_get_color_opt(&opt->diffopt, decoration->type),
 160                      stdout);
 161                if (decoration->type == DECORATION_REF_TAG)
 162                        fputs("tag: ", stdout);
 163                printf("%s", decoration->name);
 164                fputs(color_reset, stdout);
 165                fputs(color_commit, stdout);
 166                prefix = ", ";
 167                decoration = decoration->next;
 168        }
 169        putchar(')');
 170}
 171
 172/*
 173 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
 174 * Signed-off-by: and Acked-by: lines.
 175 */
 176static int detect_any_signoff(char *letter, int size)
 177{
 178        char *cp;
 179        int seen_colon = 0;
 180        int seen_at = 0;
 181        int seen_name = 0;
 182        int seen_head = 0;
 183
 184        cp = letter + size;
 185        while (letter <= --cp && *cp == '\n')
 186                continue;
 187
 188        while (letter <= cp) {
 189                char ch = *cp--;
 190                if (ch == '\n')
 191                        break;
 192
 193                if (!seen_at) {
 194                        if (ch == '@')
 195                                seen_at = 1;
 196                        continue;
 197                }
 198                if (!seen_colon) {
 199                        if (ch == '@')
 200                                return 0;
 201                        else if (ch == ':')
 202                                seen_colon = 1;
 203                        else
 204                                seen_name = 1;
 205                        continue;
 206                }
 207                if (('A' <= ch && ch <= 'Z') ||
 208                    ('a' <= ch && ch <= 'z') ||
 209                    ch == '-') {
 210                        seen_head = 1;
 211                        continue;
 212                }
 213                /* no empty last line doesn't match */
 214                return 0;
 215        }
 216        return seen_head && seen_name;
 217}
 218
 219static void append_signoff(struct strbuf *sb, const char *signoff)
 220{
 221        static const char signed_off_by[] = "Signed-off-by: ";
 222        size_t signoff_len = strlen(signoff);
 223        int has_signoff = 0;
 224        char *cp;
 225
 226        cp = sb->buf;
 227
 228        /* First see if we already have the sign-off by the signer */
 229        while ((cp = strstr(cp, signed_off_by))) {
 230
 231                has_signoff = 1;
 232
 233                cp += strlen(signed_off_by);
 234                if (cp + signoff_len >= sb->buf + sb->len)
 235                        break;
 236                if (strncmp(cp, signoff, signoff_len))
 237                        continue;
 238                if (!isspace(cp[signoff_len]))
 239                        continue;
 240                /* we already have him */
 241                return;
 242        }
 243
 244        if (!has_signoff)
 245                has_signoff = detect_any_signoff(sb->buf, sb->len);
 246
 247        if (!has_signoff)
 248                strbuf_addch(sb, '\n');
 249
 250        strbuf_addstr(sb, signed_off_by);
 251        strbuf_add(sb, signoff, signoff_len);
 252        strbuf_addch(sb, '\n');
 253}
 254
 255static unsigned int digits_in_number(unsigned int number)
 256{
 257        unsigned int i = 10, result = 1;
 258        while (i <= number) {
 259                i *= 10;
 260                result++;
 261        }
 262        return result;
 263}
 264
 265void get_patch_filename(struct commit *commit, int nr, const char *suffix,
 266                        struct strbuf *buf)
 267{
 268        int suffix_len = strlen(suffix) + 1;
 269        int start_len = buf->len;
 270
 271        strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
 272        if (commit) {
 273                int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
 274                struct pretty_print_context ctx = {0};
 275                ctx.date_mode = DATE_NORMAL;
 276
 277                format_commit_message(commit, "%f", buf, &ctx);
 278                if (max_len < buf->len)
 279                        strbuf_setlen(buf, max_len);
 280                strbuf_addstr(buf, suffix);
 281        }
 282}
 283
 284void log_write_email_headers(struct rev_info *opt, struct commit *commit,
 285                             const char **subject_p,
 286                             const char **extra_headers_p,
 287                             int *need_8bit_cte_p)
 288{
 289        const char *subject = NULL;
 290        const char *extra_headers = opt->extra_headers;
 291        const char *name = sha1_to_hex(commit->object.sha1);
 292
 293        *need_8bit_cte_p = 0; /* unknown */
 294        if (opt->total > 0) {
 295                static char buffer[64];
 296                snprintf(buffer, sizeof(buffer),
 297                         "Subject: [%s%s%0*d/%d] ",
 298                         opt->subject_prefix,
 299                         *opt->subject_prefix ? " " : "",
 300                         digits_in_number(opt->total),
 301                         opt->nr, opt->total);
 302                subject = buffer;
 303        } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 304                static char buffer[256];
 305                snprintf(buffer, sizeof(buffer),
 306                         "Subject: [%s] ",
 307                         opt->subject_prefix);
 308                subject = buffer;
 309        } else {
 310                subject = "Subject: ";
 311        }
 312
 313        printf("From %s Mon Sep 17 00:00:00 2001\n", name);
 314        graph_show_oneline(opt->graph);
 315        if (opt->message_id) {
 316                printf("Message-Id: <%s>\n", opt->message_id);
 317                graph_show_oneline(opt->graph);
 318        }
 319        if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
 320                int i, n;
 321                n = opt->ref_message_ids->nr;
 322                printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
 323                for (i = 0; i < n; i++)
 324                        printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
 325                               opt->ref_message_ids->items[i].string);
 326                graph_show_oneline(opt->graph);
 327        }
 328        if (opt->mime_boundary) {
 329                static char subject_buffer[1024];
 330                static char buffer[1024];
 331                struct strbuf filename =  STRBUF_INIT;
 332                *need_8bit_cte_p = -1; /* NEVER */
 333                snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 334                         "%s"
 335                         "MIME-Version: 1.0\n"
 336                         "Content-Type: multipart/mixed;"
 337                         " boundary=\"%s%s\"\n"
 338                         "\n"
 339                         "This is a multi-part message in MIME "
 340                         "format.\n"
 341                         "--%s%s\n"
 342                         "Content-Type: text/plain; "
 343                         "charset=UTF-8; format=fixed\n"
 344                         "Content-Transfer-Encoding: 8bit\n\n",
 345                         extra_headers ? extra_headers : "",
 346                         mime_boundary_leader, opt->mime_boundary,
 347                         mime_boundary_leader, opt->mime_boundary);
 348                extra_headers = subject_buffer;
 349
 350                get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
 351                                    opt->patch_suffix, &filename);
 352                snprintf(buffer, sizeof(buffer) - 1,
 353                         "\n--%s%s\n"
 354                         "Content-Type: text/x-patch;"
 355                         " name=\"%s\"\n"
 356                         "Content-Transfer-Encoding: 8bit\n"
 357                         "Content-Disposition: %s;"
 358                         " filename=\"%s\"\n\n",
 359                         mime_boundary_leader, opt->mime_boundary,
 360                         filename.buf,
 361                         opt->no_inline ? "attachment" : "inline",
 362                         filename.buf);
 363                opt->diffopt.stat_sep = buffer;
 364                strbuf_release(&filename);
 365        }
 366        *subject_p = subject;
 367        *extra_headers_p = extra_headers;
 368}
 369
 370void show_log(struct rev_info *opt)
 371{
 372        struct strbuf msgbuf = STRBUF_INIT;
 373        struct log_info *log = opt->loginfo;
 374        struct commit *commit = log->commit, *parent = log->parent;
 375        int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 376        const char *extra_headers = opt->extra_headers;
 377        struct pretty_print_context ctx = {0};
 378
 379        opt->loginfo = NULL;
 380        ctx.show_notes = opt->show_notes;
 381        if (!opt->verbose_header) {
 382                graph_show_commit(opt->graph);
 383
 384                if (!opt->graph)
 385                        put_revision_mark(opt, commit);
 386                fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 387                if (opt->print_parents)
 388                        show_parents(commit, abbrev_commit);
 389                show_decorations(opt, commit);
 390                if (opt->graph && !graph_is_commit_finished(opt->graph)) {
 391                        putchar('\n');
 392                        graph_show_remainder(opt->graph);
 393                }
 394                putchar(opt->diffopt.line_termination);
 395                return;
 396        }
 397
 398        /*
 399         * If use_terminator is set, we already handled any record termination
 400         * at the end of the last record.
 401         * Otherwise, add a diffopt.line_termination character before all
 402         * entries but the first.  (IOW, as a separator between entries)
 403         */
 404        if (opt->shown_one && !opt->use_terminator) {
 405                /*
 406                 * If entries are separated by a newline, the output
 407                 * should look human-readable.  If the last entry ended
 408                 * with a newline, print the graph output before this
 409                 * newline.  Otherwise it will end up as a completely blank
 410                 * line and will look like a gap in the graph.
 411                 *
 412                 * If the entry separator is not a newline, the output is
 413                 * primarily intended for programmatic consumption, and we
 414                 * never want the extra graph output before the entry
 415                 * separator.
 416                 */
 417                if (opt->diffopt.line_termination == '\n' &&
 418                    !opt->missing_newline)
 419                        graph_show_padding(opt->graph);
 420                putchar(opt->diffopt.line_termination);
 421        }
 422        opt->shown_one = 1;
 423
 424        /*
 425         * If the history graph was requested,
 426         * print the graph, up to this commit's line
 427         */
 428        graph_show_commit(opt->graph);
 429
 430        /*
 431         * Print header line of header..
 432         */
 433
 434        if (opt->commit_format == CMIT_FMT_EMAIL) {
 435                log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
 436                                        &ctx.need_8bit_cte);
 437        } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 438                fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 439                if (opt->commit_format != CMIT_FMT_ONELINE)
 440                        fputs("commit ", stdout);
 441
 442                if (!opt->graph)
 443                        put_revision_mark(opt, commit);
 444                fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
 445                      stdout);
 446                if (opt->print_parents)
 447                        show_parents(commit, abbrev_commit);
 448                if (parent)
 449                        printf(" (from %s)",
 450                               find_unique_abbrev(parent->object.sha1,
 451                                                  abbrev_commit));
 452                show_decorations(opt, commit);
 453                printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
 454                if (opt->commit_format == CMIT_FMT_ONELINE) {
 455                        putchar(' ');
 456                } else {
 457                        putchar('\n');
 458                        graph_show_oneline(opt->graph);
 459                }
 460                if (opt->reflog_info) {
 461                        /*
 462                         * setup_revisions() ensures that opt->reflog_info
 463                         * and opt->graph cannot both be set,
 464                         * so we don't need to worry about printing the
 465                         * graph info here.
 466                         */
 467                        show_reflog_message(opt->reflog_info,
 468                                    opt->commit_format == CMIT_FMT_ONELINE,
 469                                    opt->date_mode_explicit ?
 470                                        opt->date_mode :
 471                                        DATE_NORMAL);
 472                        if (opt->commit_format == CMIT_FMT_ONELINE)
 473                                return;
 474                }
 475        }
 476
 477        if (!commit->buffer)
 478                return;
 479
 480        /*
 481         * And then the pretty-printed message itself
 482         */
 483        if (ctx.need_8bit_cte >= 0)
 484                ctx.need_8bit_cte = has_non_ascii(opt->add_signoff);
 485        ctx.date_mode = opt->date_mode;
 486        ctx.abbrev = opt->diffopt.abbrev;
 487        ctx.after_subject = extra_headers;
 488        ctx.preserve_subject = opt->preserve_subject;
 489        ctx.reflog_info = opt->reflog_info;
 490        ctx.fmt = opt->commit_format;
 491        pretty_print_commit(&ctx, commit, &msgbuf);
 492
 493        if (opt->add_signoff)
 494                append_signoff(&msgbuf, opt->add_signoff);
 495        if (opt->show_log_size) {
 496                printf("log size %i\n", (int)msgbuf.len);
 497                graph_show_oneline(opt->graph);
 498        }
 499
 500        /*
 501         * Set opt->missing_newline if msgbuf doesn't
 502         * end in a newline (including if it is empty)
 503         */
 504        if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
 505                opt->missing_newline = 1;
 506        else
 507                opt->missing_newline = 0;
 508
 509        if (opt->graph)
 510                graph_show_commit_msg(opt->graph, &msgbuf);
 511        else
 512                fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 513        if (opt->use_terminator) {
 514                if (!opt->missing_newline)
 515                        graph_show_padding(opt->graph);
 516                putchar('\n');
 517        }
 518
 519        strbuf_release(&msgbuf);
 520}
 521
 522int log_tree_diff_flush(struct rev_info *opt)
 523{
 524        diffcore_std(&opt->diffopt);
 525
 526        if (diff_queue_is_empty()) {
 527                int saved_fmt = opt->diffopt.output_format;
 528                opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 529                diff_flush(&opt->diffopt);
 530                opt->diffopt.output_format = saved_fmt;
 531                return 0;
 532        }
 533
 534        if (opt->loginfo && !opt->no_commit_id) {
 535                /* When showing a verbose header (i.e. log message),
 536                 * and not in --pretty=oneline format, we would want
 537                 * an extra newline between the end of log and the
 538                 * output for readability.
 539                 */
 540                show_log(opt);
 541                if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 542                    opt->verbose_header &&
 543                    opt->commit_format != CMIT_FMT_ONELINE) {
 544                        int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 545                        if ((pch & opt->diffopt.output_format) == pch)
 546                                printf("---");
 547                        if (opt->diffopt.output_prefix) {
 548                                struct strbuf *msg = NULL;
 549                                msg = opt->diffopt.output_prefix(&opt->diffopt,
 550                                        opt->diffopt.output_prefix_data);
 551                                fwrite(msg->buf, msg->len, 1, stdout);
 552                        }
 553                        putchar('\n');
 554                }
 555        }
 556        diff_flush(&opt->diffopt);
 557        return 1;
 558}
 559
 560static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 561{
 562        unsigned const char *sha1 = commit->object.sha1;
 563
 564        diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 565        return !opt->loginfo;
 566}
 567
 568/*
 569 * Show the diff of a commit.
 570 *
 571 * Return true if we printed any log info messages
 572 */
 573static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 574{
 575        int showed_log;
 576        struct commit_list *parents;
 577        unsigned const char *sha1 = commit->object.sha1;
 578
 579        if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
 580                return 0;
 581
 582        /* Root commit? */
 583        parents = commit->parents;
 584        if (!parents) {
 585                if (opt->show_root_diff) {
 586                        diff_root_tree_sha1(sha1, "", &opt->diffopt);
 587                        log_tree_diff_flush(opt);
 588                }
 589                return !opt->loginfo;
 590        }
 591
 592        /* More than one parent? */
 593        if (parents && parents->next) {
 594                if (opt->ignore_merges)
 595                        return 0;
 596                else if (opt->combine_merges)
 597                        return do_diff_combined(opt, commit);
 598                else if (opt->first_parent_only) {
 599                        /*
 600                         * Generate merge log entry only for the first
 601                         * parent, showing summary diff of the others
 602                         * we merged _in_.
 603                         */
 604                        diff_tree_sha1(parents->item->object.sha1, sha1, "", &opt->diffopt);
 605                        log_tree_diff_flush(opt);
 606                        return !opt->loginfo;
 607                }
 608
 609                /* If we show individual diffs, show the parent info */
 610                log->parent = parents->item;
 611        }
 612
 613        showed_log = 0;
 614        for (;;) {
 615                struct commit *parent = parents->item;
 616
 617                diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 618                log_tree_diff_flush(opt);
 619
 620                showed_log |= !opt->loginfo;
 621
 622                /* Set up the log info for the next parent, if any.. */
 623                parents = parents->next;
 624                if (!parents)
 625                        break;
 626                log->parent = parents->item;
 627                opt->loginfo = log;
 628        }
 629        return showed_log;
 630}
 631
 632int log_tree_commit(struct rev_info *opt, struct commit *commit)
 633{
 634        struct log_info log;
 635        int shown;
 636
 637        log.commit = commit;
 638        log.parent = NULL;
 639        opt->loginfo = &log;
 640
 641        shown = log_tree_diff(opt, commit, &log);
 642        if (!shown && opt->loginfo && opt->always_show_header) {
 643                log.parent = NULL;
 644                show_log(opt);
 645                shown = 1;
 646        }
 647        opt->loginfo = NULL;
 648        maybe_flush_or_die(stdout, "stdout");
 649        return shown;
 650}