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a6f3f3b108
Diff-tree-helper take two patch inadvertently dropped the support of -R option, which is necessary to produce reverse diff based on diff-cache and diff-files output (diff-tree does not matter since you can feed two trees in reverse order). This patch restores it. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
143 lines
2.8 KiB
C
143 lines
2.8 KiB
C
/*
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* Copyright (C) 2005 Junio C Hamano
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*/
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#include "cache.h"
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#include "strbuf.h"
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#include "diff.h"
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static int matches_pathspec(const char *name, const char **spec, int cnt)
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{
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int i;
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int namelen = strlen(name);
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for (i = 0; i < cnt; i++) {
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int speclen = strlen(spec[i]);
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if (! strncmp(spec[i], name, speclen) &&
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speclen <= namelen &&
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(name[speclen] == 0 ||
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name[speclen] == '/'))
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return 1;
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}
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return 0;
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}
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static int parse_oneside_change(const char *cp, struct diff_spec *one,
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char *path)
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{
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int ch;
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one->file_valid = one->sha1_valid = 1;
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one->mode = 0;
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while ((ch = *cp) && '0' <= ch && ch <= '7') {
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one->mode = (one->mode << 3) | (ch - '0');
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cp++;
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}
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if (strncmp(cp, "\tblob\t", 6))
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return -1;
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cp += 6;
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if (get_sha1_hex(cp, one->u.sha1))
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return -1;
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cp += 40;
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if (*cp++ != '\t')
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return -1;
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strcpy(path, cp);
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return 0;
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}
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static int parse_diff_tree_output(const char *buf,
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const char **spec, int cnt, int reverse)
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{
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struct diff_spec old, new;
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char path[PATH_MAX];
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const char *cp = buf;
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int ch;
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switch (*cp++) {
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case 'U':
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if (!cnt || matches_pathspec(cp + 1, spec, cnt))
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diff_unmerge(cp + 1);
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return 0;
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case '+':
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old.file_valid = 0;
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parse_oneside_change(cp, &new, path);
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break;
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case '-':
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new.file_valid = 0;
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parse_oneside_change(cp, &old, path);
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break;
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case '*':
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old.file_valid = old.sha1_valid =
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new.file_valid = new.sha1_valid = 1;
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old.mode = new.mode = 0;
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while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
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old.mode = (old.mode << 3) | (ch - '0');
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cp++;
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}
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if (strncmp(cp, "->", 2))
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return -1;
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cp += 2;
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while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
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new.mode = (new.mode << 3) | (ch - '0');
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cp++;
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}
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if (strncmp(cp, "\tblob\t", 6))
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return -1;
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cp += 6;
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if (get_sha1_hex(cp, old.u.sha1))
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return -1;
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cp += 40;
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if (strncmp(cp, "->", 2))
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return -1;
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cp += 2;
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if (get_sha1_hex(cp, new.u.sha1))
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return -1;
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cp += 40;
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if (*cp++ != '\t')
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return -1;
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strcpy(path, cp);
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break;
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default:
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return -1;
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}
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if (!cnt || matches_pathspec(path, spec, cnt)) {
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if (reverse)
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run_external_diff(path, &new, &old);
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else
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run_external_diff(path, &old, &new);
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}
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return 0;
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}
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static const char *diff_tree_helper_usage =
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"diff-tree-helper [-R] [-z] paths...";
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int main(int ac, const char **av) {
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struct strbuf sb;
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int reverse = 0;
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int line_termination = '\n';
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strbuf_init(&sb);
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while (1 < ac && av[1][0] == '-') {
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if (av[1][1] == 'R')
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reverse = 1;
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else if (av[1][1] == 'z')
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line_termination = 0;
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else
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usage(diff_tree_helper_usage);
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ac--; av++;
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}
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/* the remaining parameters are paths patterns */
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while (1) {
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int status;
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read_line(&sb, stdin, line_termination);
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if (sb.eof)
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break;
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status = parse_diff_tree_output(sb.buf, av+1, ac-1, reverse);
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if (status)
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fprintf(stderr, "cannot parse %s\n", sb.buf);
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}
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return 0;
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}
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