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c8c5e43ac3
Just like tbdiff, we now show the diff between matching patches. This is a "diff of two diffs", so it can be a bit daunting to read for the beginner. An alternative would be to display an interdiff, i.e. the hypothetical diff which is the result of first reverting the old diff and then applying the new diff. Especially when rebasing frequently, an interdiff is often not feasible, though: if the old diff cannot be applied in reverse (due to a moving upstream), an interdiff can simply not be inferred. This commit brings `range-diff` closer to feature parity with regard to tbdiff. To make `git range-diff` respect e.g. color.diff.* settings, we have to adjust git_branch_config() accordingly. Note: while we now parse diff options such as --color, the effect is not yet the same as in tbdiff, where also the commit pairs would be colored. This is left for a later commit. Note also: while tbdiff accepts the `--no-patches` option to suppress these diffs between patches, we prefer the `-s` (or `--no-patch`) option that is automatically supported via our use of diff_opt_parse(). And finally note: to support diff options, we have to call `parse_options()` such that it keeps unknown options, and then loop over those and let `diff_opt_parse()` handle them. After that loop, we have to call `parse_options()` again, to make sure that no unknown options are left. Helped-by: Thomas Gummerer <t.gummerer@gmail.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
#include "cache.h"
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#include "builtin.h"
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#include "parse-options.h"
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#include "range-diff.h"
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#include "config.h"
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static const char * const builtin_range_diff_usage[] = {
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N_("git range-diff [<options>] <old-base>..<old-tip> <new-base>..<new-tip>"),
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N_("git range-diff [<options>] <old-tip>...<new-tip>"),
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N_("git range-diff [<options>] <base> <old-tip> <new-tip>"),
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NULL
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};
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int cmd_range_diff(int argc, const char **argv, const char *prefix)
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{
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int creation_factor = 60;
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struct diff_options diffopt = { NULL };
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struct option options[] = {
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OPT_INTEGER(0, "creation-factor", &creation_factor,
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N_("Percentage by which creation is weighted")),
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OPT_END()
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};
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int i, j, res = 0;
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struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
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git_config(git_diff_ui_config, NULL);
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diff_setup(&diffopt);
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diffopt.output_format = DIFF_FORMAT_PATCH;
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argc = parse_options(argc, argv, NULL, options,
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builtin_range_diff_usage, PARSE_OPT_KEEP_UNKNOWN |
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PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
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for (i = j = 1; i < argc && strcmp("--", argv[i]); ) {
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int c = diff_opt_parse(&diffopt, argv + i, argc - i, prefix);
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if (!c)
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argv[j++] = argv[i++];
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else
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i += c;
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}
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while (i < argc)
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argv[j++] = argv[i++];
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argc = j;
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diff_setup_done(&diffopt);
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/* Make sure that there are no unparsed options */
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argc = parse_options(argc, argv, NULL,
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options + ARRAY_SIZE(options) - 1, /* OPT_END */
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builtin_range_diff_usage, 0);
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if (argc == 2) {
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if (!strstr(argv[0], ".."))
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die(_("no .. in range: '%s'"), argv[0]);
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strbuf_addstr(&range1, argv[0]);
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if (!strstr(argv[1], ".."))
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die(_("no .. in range: '%s'"), argv[1]);
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strbuf_addstr(&range2, argv[1]);
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} else if (argc == 3) {
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strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
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strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
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} else if (argc == 1) {
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const char *b = strstr(argv[0], "..."), *a = argv[0];
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int a_len;
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if (!b) {
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error(_("single arg format must be symmetric range"));
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usage_with_options(builtin_range_diff_usage, options);
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}
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a_len = (int)(b - a);
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if (!a_len) {
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a = "HEAD";
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a_len = strlen(a);
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}
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b += 3;
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if (!*b)
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b = "HEAD";
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strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
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strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
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} else {
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error(_("need two commit ranges"));
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usage_with_options(builtin_range_diff_usage, options);
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}
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res = show_range_diff(range1.buf, range2.buf, creation_factor,
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&diffopt);
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strbuf_release(&range1);
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strbuf_release(&range2);
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return res;
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}
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