Andrew's git - gitweb.git/blob

cb0d0b15e711eb74afe6a48c4b6cedcf40de763f
   1#include "cache.h"
   2#include "diff.h"
   3#include "commit.h"
   4#include "log-tree.h"
   5
   6void init_log_tree_opt(struct log_tree_opt *opt)
   7{
   8        memset(opt, 0, sizeof *opt);
   9        opt->ignore_merges = 1;
  10        opt->header_prefix = "";
  11        opt->commit_format = CMIT_FMT_RAW;
  12        diff_setup(&opt->diffopt);
  13}
  14
  15int log_tree_opt_parse(struct log_tree_opt *opt, const char **av, int ac)
  16{
  17        const char *arg;
  18        int cnt = diff_opt_parse(&opt->diffopt, av, ac);
  19        if (0 < cnt)
  20                return cnt;
  21        arg = *av;
  22        if (!strcmp(arg, "-r"))
  23                opt->diffopt.recursive = 1;
  24        else if (!strcmp(arg, "-t")) {
  25                opt->diffopt.recursive = 1;
  26                opt->diffopt.tree_in_recursive = 1;
  27        }
  28        else if (!strcmp(arg, "-m"))
  29                opt->ignore_merges = 0;
  30        else if (!strcmp(arg, "-c"))
  31                opt->combine_merges = 1;
  32        else if (!strcmp(arg, "--cc")) {
  33                opt->dense_combined_merges = 1;
  34                opt->combine_merges = 1;
  35        }
  36        else if (!strcmp(arg, "-v")) {
  37                opt->verbose_header = 1;
  38                opt->header_prefix = "diff-tree ";
  39        }
  40        else if (!strncmp(arg, "--pretty", 8)) {
  41                opt->verbose_header = 1;
  42                opt->header_prefix = "diff-tree ";
  43                opt->commit_format = get_commit_format(arg+8);
  44        }
  45        else if (!strcmp(arg, "--root"))
  46                opt->show_root_diff = 1;
  47        else if (!strcmp(arg, "--no-commit-id"))
  48                opt->no_commit_id = 1;
  49        else if (!strcmp(arg, "--always"))
  50                opt->always_show_header = 1;
  51        else
  52                return 0;
  53        return 1;
  54}
  55
  56int log_tree_diff_flush(struct log_tree_opt *opt)
  57{
  58        diffcore_std(&opt->diffopt);
  59        if (diff_queue_is_empty()) {
  60                int saved_fmt = opt->diffopt.output_format;
  61                opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  62                diff_flush(&opt->diffopt);
  63                opt->diffopt.output_format = saved_fmt;
  64                return 0;
  65        }
  66        if (opt->header) {
  67                if (!opt->no_commit_id)
  68                        printf("%s%c", opt->header,
  69                               opt->diffopt.line_termination);
  70                opt->header = NULL;
  71        }
  72        diff_flush(&opt->diffopt);
  73        return 1;
  74}
  75
  76static int diff_root_tree(struct log_tree_opt *opt,
  77                          const unsigned char *new, const char *base)
  78{
  79        int retval;
  80        void *tree;
  81        struct tree_desc empty, real;
  82
  83        tree = read_object_with_reference(new, tree_type, &real.size, NULL);
  84        if (!tree)
  85                die("unable to read root tree (%s)", sha1_to_hex(new));
  86        real.buf = tree;
  87
  88        empty.buf = "";
  89        empty.size = 0;
  90        retval = diff_tree(&empty, &real, base, &opt->diffopt);
  91        free(tree);
  92        log_tree_diff_flush(opt);
  93        return retval;
  94}
  95
  96static const char *generate_header(struct log_tree_opt *opt,
  97                                   const unsigned char *commit_sha1,
  98                                   const unsigned char *parent_sha1,
  99                                   const struct commit *commit)
 100{
 101        static char this_header[16384];
 102        int offset;
 103        unsigned long len;
 104        int abbrev = opt->diffopt.abbrev;
 105        const char *msg = commit->buffer;
 106
 107        if (!opt->verbose_header)
 108                return sha1_to_hex(commit_sha1);
 109
 110        len = strlen(msg);
 111
 112        offset = sprintf(this_header, "%s%s ",
 113                         opt->header_prefix,
 114                         diff_unique_abbrev(commit_sha1, abbrev));
 115        if (commit_sha1 != parent_sha1)
 116                offset += sprintf(this_header + offset, "(from %s)\n",
 117                                  parent_sha1
 118                                  ? diff_unique_abbrev(parent_sha1, abbrev)
 119                                  : "root");
 120        else
 121                offset += sprintf(this_header + offset, "(from parents)\n");
 122        offset += pretty_print_commit(opt->commit_format, commit, len,
 123                                      this_header + offset,
 124                                      sizeof(this_header) - offset, abbrev);
 125        if (opt->always_show_header) {
 126                puts(this_header);
 127                return NULL;
 128        }
 129        return this_header;
 130}
 131
 132static int do_diff_combined(struct log_tree_opt *opt, struct commit *commit)
 133{
 134        unsigned const char *sha1 = commit->object.sha1;
 135
 136        opt->header = generate_header(opt, sha1, sha1, commit);
 137        opt->header = diff_tree_combined_merge(sha1, opt->header,
 138                                                opt->dense_combined_merges,
 139                                                &opt->diffopt);
 140        if (!opt->header && opt->verbose_header)
 141                opt->header_prefix = "\ndiff-tree ";
 142        return 0;
 143}
 144
 145int log_tree_commit(struct log_tree_opt *opt, struct commit *commit)
 146{
 147        struct commit_list *parents;
 148        unsigned const char *sha1 = commit->object.sha1;
 149
 150        /* Root commit? */
 151        if (opt->show_root_diff && !commit->parents) {
 152                opt->header = generate_header(opt, sha1, NULL, commit);
 153                diff_root_tree(opt, sha1, "");
 154        }
 155
 156        /* More than one parent? */
 157        if (commit->parents && commit->parents->next) {
 158                if (opt->ignore_merges)
 159                        return 0;
 160                else if (opt->combine_merges)
 161                        return do_diff_combined(opt, commit);
 162        }
 163
 164        for (parents = commit->parents; parents; parents = parents->next) {
 165                struct commit *parent = parents->item;
 166                unsigned const char *psha1 = parent->object.sha1;
 167                opt->header = generate_header(opt, sha1, psha1, commit);
 168                diff_tree_sha1(psha1, sha1, "", &opt->diffopt);
 169                log_tree_diff_flush(opt);               
 170
 171                if (!opt->header && opt->verbose_header)
 172                        opt->header_prefix = "\ndiff-tree ";
 173        }
 174        return 0;
 175}
 176
 177int parse_whatchanged_opt(int ac, const char **av, struct whatchanged_opt *wcopt)
 178{
 179        struct rev_info *rev = &wcopt->revopt;
 180        struct log_tree_opt *opt = &wcopt->logopt;
 181        const char **unrecognized = av+1;
 182        int left = 1;
 183
 184        ac = setup_revisions(ac, av, rev, "HEAD");
 185        while (1 < ac) {
 186                const char *arg = av[1];
 187                if (!strncmp(arg, "--pretty", 8)) {
 188                        opt->commit_format = get_commit_format(arg + 8);
 189                }
 190                else if (!strcmp(arg, "--no-abbrev")) {
 191                        wcopt->abbrev = 0;
 192                }
 193                else if (!strcmp(arg, "--abbrev")) {
 194                        wcopt->abbrev = DEFAULT_ABBREV;
 195                }
 196                else if (!strcmp(arg, "--abbrev-commit")) {
 197                        wcopt->abbrev_commit = 1;
 198                }
 199                else if (!strncmp(arg, "--abbrev=", 9)) {
 200                        wcopt->abbrev = strtoul(arg + 9, NULL, 10);
 201                        if (wcopt->abbrev && wcopt->abbrev < MINIMUM_ABBREV)
 202                                wcopt->abbrev = MINIMUM_ABBREV;
 203                        else if (40 < wcopt->abbrev)
 204                                wcopt->abbrev = 40;
 205                }
 206                else if (!strcmp(arg, "--full-diff")) {
 207                        wcopt->do_diff = 1;
 208                        wcopt->full_diff = 1;
 209                }
 210                else {
 211                        int cnt = log_tree_opt_parse(opt, av+1, ac-1);
 212                        if (0 < cnt) {
 213                                wcopt->do_diff = 1;
 214                                av += cnt;
 215                                ac -= cnt;
 216                                continue;
 217                        }
 218                        *unrecognized++ = arg;
 219                        left++;
 220                }
 221                ac--; av++;
 222        }
 223
 224        if (wcopt->do_diff) {
 225                opt->diffopt.abbrev = wcopt->abbrev;
 226                opt->verbose_header = 0;
 227                opt->always_show_header = 0;
 228                opt->no_commit_id = 1;
 229                if (opt->combine_merges)
 230                        opt->ignore_merges = 0;
 231                if (opt->dense_combined_merges)
 232                        opt->diffopt.output_format = DIFF_FORMAT_PATCH;
 233                if (opt->diffopt.output_format == DIFF_FORMAT_PATCH)
 234                        opt->diffopt.recursive = 1;
 235                if (!wcopt->full_diff && rev->prune_data)
 236                        diff_tree_setup_paths(rev->prune_data, &opt->diffopt);
 237                diff_setup_done(&opt->diffopt);
 238        }
 239        return left;
 240}