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148 lines
3.2 KiB
148 lines
3.2 KiB
/* |
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* Copyright (C) 2005 Junio C Hamano |
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*/ |
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#include <limits.h> |
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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 detect_rename = 0; |
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static int diff_score_opt = 0; |
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static int generate_patch = 1; |
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static char *pickaxe = 0; |
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static int parse_oneside_change(const char *cp, int *mode, |
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unsigned char *sha1, char *path) |
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{ |
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int ch, m; |
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m = 0; |
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while ((ch = *cp) && '0' <= ch && ch <= '7') { |
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m = (m << 3) | (ch - '0'); |
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cp++; |
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} |
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*mode = m; |
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if (strncmp(cp, "\tblob\t", 6) && strncmp(cp, " blob ", 6) && |
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strncmp(cp, "\ttree\t", 6) && strncmp(cp, " tree ", 6)) |
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return -1; |
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cp += 6; |
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if (get_sha1_hex(cp, sha1)) |
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return -1; |
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cp += 40; |
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if ((*cp != '\t') && *cp != ' ') |
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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_raw_output(const char *buf) |
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{ |
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char path[PATH_MAX]; |
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unsigned char old_sha1[20], new_sha1[20]; |
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const char *cp = buf; |
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int ch, old_mode, new_mode; |
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switch (*cp++) { |
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case 'U': |
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diff_unmerge(cp + 1); |
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break; |
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case '+': |
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if (parse_oneside_change(cp, &new_mode, new_sha1, path)) |
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return -1; |
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diff_addremove('+', new_mode, new_sha1, path, NULL); |
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break; |
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case '-': |
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if (parse_oneside_change(cp, &old_mode, old_sha1, path)) |
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return -1; |
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diff_addremove('-', old_mode, old_sha1, path, NULL); |
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break; |
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case '*': |
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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) && strncmp(cp, " blob ", 6) && |
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strncmp(cp, "\ttree\t", 6) && strncmp(cp, " tree ", 6)) |
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return -1; |
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cp += 6; |
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if (get_sha1_hex(cp, old_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_sha1)) |
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return -1; |
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cp += 40; |
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if ((*cp != '\t') && *cp != ' ') |
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return -1; |
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strcpy(path, ++cp); |
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diff_change(old_mode, new_mode, old_sha1, new_sha1, path, NULL); |
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break; |
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default: |
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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 const char *diff_helper_usage = |
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"git-diff-helper [-z] [-R] [-M] [-C] [-S<string>] 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 if (av[1][1] == 'p') /* hidden from the help */ |
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generate_patch = 0; |
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else if (av[1][1] == 'M') { |
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detect_rename = 1; |
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diff_score_opt = diff_scoreopt_parse(av[1]); |
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} |
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else if (av[1][1] == 'C') { |
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detect_rename = 2; |
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diff_score_opt = diff_scoreopt_parse(av[1]); |
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} |
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else if (av[1][1] == 'S') { |
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pickaxe = av[1] + 2; |
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} |
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else |
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usage(diff_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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diff_setup(detect_rename, diff_score_opt, pickaxe, |
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reverse, (generate_patch ? -1 : line_termination), |
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av+1, ac-1); |
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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_raw_output(sb.buf); |
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if (status) { |
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diff_flush(); |
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printf("%s%c", sb.buf, line_termination); |
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} |
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} |
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diff_flush(); |
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return 0; |
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}
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