edd6a31f46
In d9c66f0b5b (range-diff: first rudimentary implementation,
2018-08-13), we introduced the argument handling of the `range-diff`
command, special-casing three different stanzas based on the argument
count.
The somewhat unorthodox order (first handling the case of 2 arguments,
then 3, then 1) was chosen for clarity: the natural argument number is 2
because that is how many revision ranges are used internally. The code
to handle three arguments is relatively trivial, so it was added next.
And finally, the code to ungarble a single symmetric range into two
separate ones was added, because it was the most complicated (the most
inelegant part being about interpreting empty sides of the symmetric
range as `HEAD`).
In preparation for allowing pathspecs in `git range-diff` invocations,
where we no longer have the luxury of using the number of arguments to
disambiguate between these three different ways to specify the commit
ranges, we need to order these cases by argument count, in descending
order.
This patch is best viewed with `--color-moved`.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
105 lines
3.0 KiB
C
105 lines
3.0 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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#include "revision.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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struct diff_options diffopt = { NULL };
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struct strvec other_arg = STRVEC_INIT;
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struct range_diff_options range_diff_opts = {
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.creation_factor = RANGE_DIFF_CREATION_FACTOR_DEFAULT,
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.diffopt = &diffopt,
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.other_arg = &other_arg
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};
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int simple_color = -1, left_only = 0, right_only = 0;
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struct option range_diff_options[] = {
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OPT_INTEGER(0, "creation-factor",
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&range_diff_opts.creation_factor,
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N_("percentage by which creation is weighted")),
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OPT_BOOL(0, "no-dual-color", &simple_color,
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N_("use simple diff colors")),
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OPT_PASSTHRU_ARGV(0, "notes", &other_arg,
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N_("notes"), N_("passed to 'git log'"),
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PARSE_OPT_OPTARG),
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OPT_BOOL(0, "left-only", &left_only,
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N_("only emit output related to the first range")),
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OPT_BOOL(0, "right-only", &right_only,
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N_("only emit output related to the second range")),
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OPT_END()
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};
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struct option *options;
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int 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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repo_diff_setup(the_repository, &diffopt);
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options = parse_options_concat(range_diff_options, diffopt.parseopts);
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argc = parse_options(argc, argv, prefix, options,
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builtin_range_diff_usage, 0);
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diff_setup_done(&diffopt);
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/* force color when --dual-color was used */
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if (!simple_color)
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diffopt.use_color = 1;
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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 == 2) {
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if (!is_range_diff_range(argv[0]))
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die(_("not a commit range: '%s'"), argv[0]);
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strbuf_addstr(&range1, argv[0]);
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if (!is_range_diff_range(argv[1]))
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die(_("not a commit range: '%s'"), argv[1]);
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strbuf_addstr(&range2, argv[1]);
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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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FREE_AND_NULL(options);
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range_diff_opts.dual_color = simple_color < 1;
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range_diff_opts.left_only = left_only;
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range_diff_opts.right_only = right_only;
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res = show_range_diff(range1.buf, range2.buf, &range_diff_opts);
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strvec_clear(&other_arg);
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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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