Andrew's git - gitweb.git/blob - builtin/range-diff.c

   1#include "cache.h"
   2#include "builtin.h"
   3#include "parse-options.h"
   4#include "range-diff.h"
   5#include "config.h"
   6
   7static const char * const builtin_range_diff_usage[] = {
   8N_("git range-diff [<options>] <old-base>..<old-tip> <new-base>..<new-tip>"),
   9N_("git range-diff [<options>] <old-tip>...<new-tip>"),
  10N_("git range-diff [<options>] <base> <old-tip> <new-tip>"),
  11NULL
  12};
  13
  14int cmd_range_diff(int argc, const char **argv, const char *prefix)
  15{
  16        int creation_factor = 60;
  17        struct diff_options diffopt = { NULL };
  18        struct option options[] = {
  19                OPT_INTEGER(0, "creation-factor", &creation_factor,
  20                            N_("Percentage by which creation is weighted")),
  21                OPT_END()
  22        };
  23        int i, j, res = 0;
  24        struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  25
  26        git_config(git_diff_ui_config, NULL);
  27
  28        diff_setup(&diffopt);
  29        diffopt.output_format = DIFF_FORMAT_PATCH;
  30
  31        argc = parse_options(argc, argv, NULL, options,
  32                             builtin_range_diff_usage, PARSE_OPT_KEEP_UNKNOWN |
  33                             PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
  34
  35        for (i = j = 1; i < argc && strcmp("--", argv[i]); ) {
  36                int c = diff_opt_parse(&diffopt, argv + i, argc - i, prefix);
  37
  38                if (!c)
  39                        argv[j++] = argv[i++];
  40                else
  41                        i += c;
  42        }
  43        while (i < argc)
  44                argv[j++] = argv[i++];
  45        argc = j;
  46        diff_setup_done(&diffopt);
  47
  48        /* Make sure that there are no unparsed options */
  49        argc = parse_options(argc, argv, NULL,
  50                             options + ARRAY_SIZE(options) - 1, /* OPT_END */
  51                             builtin_range_diff_usage, 0);
  52
  53        if (argc == 2) {
  54                if (!strstr(argv[0], ".."))
  55                        die(_("no .. in range: '%s'"), argv[0]);
  56                strbuf_addstr(&range1, argv[0]);
  57
  58                if (!strstr(argv[1], ".."))
  59                        die(_("no .. in range: '%s'"), argv[1]);
  60                strbuf_addstr(&range2, argv[1]);
  61        } else if (argc == 3) {
  62                strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  63                strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  64        } else if (argc == 1) {
  65                const char *b = strstr(argv[0], "..."), *a = argv[0];
  66                int a_len;
  67
  68                if (!b) {
  69                        error(_("single arg format must be symmetric range"));
  70                        usage_with_options(builtin_range_diff_usage, options);
  71                }
  72
  73                a_len = (int)(b - a);
  74                if (!a_len) {
  75                        a = "HEAD";
  76                        a_len = strlen(a);
  77                }
  78                b += 3;
  79                if (!*b)
  80                        b = "HEAD";
  81                strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
  82                strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
  83        } else {
  84                error(_("need two commit ranges"));
  85                usage_with_options(builtin_range_diff_usage, options);
  86        }
  87
  88        res = show_range_diff(range1.buf, range2.buf, creation_factor,
  89                              &diffopt);
  90
  91        strbuf_release(&range1);
  92        strbuf_release(&range2);
  93
  94        return res;
  95}