#include "strbuf.h"
#include "diff.h"
-static int matches_pathspec(const char *name, const char **spec, int cnt)
-{
- int i;
- int namelen = strlen(name);
- for (i = 0; i < cnt; i++) {
- int speclen = strlen(spec[i]);
- if (! strncmp(spec[i], name, speclen) &&
- speclen <= namelen &&
- (name[speclen] == 0 ||
- name[speclen] == '/'))
- return 1;
- }
- return 0;
-}
-
static int detect_rename = 0;
+static int diff_score_opt = 0;
+static const char *pickaxe = NULL;
+static int diff_output_style = DIFF_FORMAT_PATCH;
+static int line_termination = '\n';
+static int inter_name_termination = '\t';
-/*
- * We do not detect circular renames. Just hold created and deleted
- * entries and later attempt to match them up. If they do not match,
- * then spit them out as deletes or creates as original.
- */
-
-static struct diff_spec_hold {
- struct diff_spec_hold *next;
- struct diff_spec_hold *matched;
- struct diff_spec old, new;
- char path[1];
-} *createdfile, *deletedfile;
-
-static void hold_spec(const char *path,
- struct diff_spec *old, struct diff_spec *new)
-{
- struct diff_spec_hold **list, *elem;
- list = (! old->file_valid) ? &createdfile : &deletedfile;
- elem = xmalloc(sizeof(*elem) + strlen(path));
- strcpy(elem->path, path);
- elem->next = *list;
- *list = elem;
- elem->old = *old;
- elem->new = *new;
- elem->matched = 0;
-}
-
-#define MINIMUM_SCORE 7000
-int estimate_similarity(struct diff_spec *one, struct diff_spec *two)
+static int parse_diff_raw(char *buf1, char *buf2, char *buf3)
{
- /* Return how similar they are, representing the score as an
- * integer between 0 and 10000.
- *
- * This version is very dumb and detects exact matches only.
- * Wnen Nico's delta stuff gets in, I'll use the delta
- * algorithm to estimate the similarity score in core.
- */
-
- if (one->sha1_valid && two->sha1_valid &&
- !memcmp(one->blob_sha1, two->blob_sha1, 20))
- return 10000;
- return 0;
-}
-
-static void flush_renames(const char **spec, int cnt, int reverse)
-{
- struct diff_spec_hold *rename_src, *rename_dst, *elem;
- struct diff_spec_hold *leftover = NULL;
- int score, best_score;
-
- while (createdfile) {
- rename_dst = createdfile;
- createdfile = rename_dst->next;
- best_score = MINIMUM_SCORE;
- rename_src = NULL;
- for (elem = deletedfile;
- elem;
- elem = elem->next) {
- if (elem->matched)
- continue;
- score = estimate_similarity(&elem->old,
- &rename_dst->new);
- if (best_score < score) {
- rename_src = elem;
- best_score = score;
- }
- }
- if (rename_src) {
- rename_src->matched = rename_dst;
- rename_dst->matched = rename_src;
-
- if (!cnt ||
- matches_pathspec(rename_src->path, spec, cnt) ||
- matches_pathspec(rename_dst->path, spec, cnt)) {
- if (reverse)
- run_external_diff(rename_dst->path,
- rename_src->path,
- &rename_dst->new,
- &rename_src->old);
- else
- run_external_diff(rename_src->path,
- rename_dst->path,
- &rename_src->old,
- &rename_dst->new);
- }
- }
- else {
- rename_dst->next = leftover;
- leftover = rename_dst;
- }
- }
-
- /* unmatched deletes */
- for (elem = deletedfile; elem; elem = elem->next) {
- if (elem->matched)
- continue;
- if (!cnt ||
- matches_pathspec(elem->path, spec, cnt)) {
- if (reverse)
- run_external_diff(elem->path, NULL,
- &elem->new, &elem->old);
- else
- run_external_diff(elem->path, NULL,
- &elem->old, &elem->new);
- }
- }
-
- /* unmatched creates */
- for (elem = leftover; elem; elem = elem->next) {
- if (!cnt ||
- matches_pathspec(elem->path, spec, cnt)) {
- if (reverse)
- run_external_diff(elem->path, NULL,
- &elem->new, &elem->old);
- else
- run_external_diff(elem->path, NULL,
- &elem->old, &elem->new);
- }
+ char old_path[PATH_MAX];
+ unsigned char old_sha1[20], new_sha1[20];
+ char *ep;
+ char *cp = buf1;
+ int ch, old_mode, new_mode;
+
+ old_mode = new_mode = 0;
+ while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
+ old_mode = (old_mode << 3) | (ch - '0');
+ cp++;
}
-}
-
-static int parse_oneside_change(const char *cp, struct diff_spec *one,
- char *path)
-{
- int ch;
-
- one->file_valid = one->sha1_valid = 1;
- one->mode = 0;
- while ((ch = *cp) && '0' <= ch && ch <= '7') {
- one->mode = (one->mode << 3) | (ch - '0');
+ if (*cp++ != ' ')
+ return -1;
+ while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
+ new_mode = (new_mode << 3) | (ch - '0');
cp++;
}
-
- if (strncmp(cp, "\tblob\t", 6))
+ if (*cp++ != ' ')
return -1;
- cp += 6;
- if (get_sha1_hex(cp, one->blob_sha1))
+ if (get_sha1_hex(cp, old_sha1))
return -1;
cp += 40;
- if (*cp++ != '\t')
+ if (*cp++ != ' ')
return -1;
- strcpy(path, cp);
- return 0;
-}
-
-static int parse_diff_raw_output(const char *buf,
- const char **spec, int cnt, int reverse)
-{
- struct diff_spec old, new;
- char path[PATH_MAX];
- const char *cp = buf;
- int ch;
-
- switch (*cp++) {
- case 'U':
- if (!cnt || matches_pathspec(cp + 1, spec, cnt))
- diff_unmerge(cp + 1);
- return 0;
- case '+':
- old.file_valid = 0;
- parse_oneside_change(cp, &new, path);
- break;
- case '-':
- new.file_valid = 0;
- parse_oneside_change(cp, &old, path);
- break;
- case '*':
- old.file_valid = old.sha1_valid =
- new.file_valid = new.sha1_valid = 1;
- old.mode = new.mode = 0;
- while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
- old.mode = (old.mode << 3) | (ch - '0');
- cp++;
- }
- if (strncmp(cp, "->", 2))
- return -1;
- cp += 2;
- while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
- new.mode = (new.mode << 3) | (ch - '0');
- cp++;
- }
- if (strncmp(cp, "\tblob\t", 6))
- return -1;
- cp += 6;
- if (get_sha1_hex(cp, old.blob_sha1))
- return -1;
- cp += 40;
- if (strncmp(cp, "->", 2))
- return -1;
- cp += 2;
- if (get_sha1_hex(cp, new.blob_sha1))
- return -1;
- cp += 40;
- if (*cp++ != '\t')
- return -1;
- strcpy(path, cp);
- break;
- default:
+ if (get_sha1_hex(cp, new_sha1))
return -1;
- }
-
- if (detect_rename && old.file_valid != new.file_valid) {
- /* hold these */
- hold_spec(path, &old, &new);
- return 0;
- }
-
- if (!cnt || matches_pathspec(path, spec, cnt)) {
- if (reverse)
- run_external_diff(path, NULL, &new, &old);
- else
- run_external_diff(path, NULL, &old, &new);
- }
+ cp += 40;
+ if (*cp++ != inter_name_termination)
+ return -1;
+ if (buf2)
+ cp = buf2;
+ ep = strchr(cp, inter_name_termination);
+ if (!ep)
+ return -1;
+ *ep++ = 0;
+ strcpy(old_path, cp);
+ diff_guif(old_mode, new_mode, old_sha1, new_sha1,
+ old_path, buf3 ? buf3 : ep);
return 0;
}
static const char *diff_helper_usage =
- "git-diff-helper [-r] [-R] [-z] paths...";
+ "git-diff-helper [-z] [-R] [-M] [-C] [-S<string>] paths...";
int main(int ac, const char **av) {
- struct strbuf sb;
- int reverse = 0;
- int line_termination = '\n';
+ struct strbuf sb1, sb2, sb3;
+ int reverse_diff = 0;
- strbuf_init(&sb);
+ strbuf_init(&sb1);
+ strbuf_init(&sb2);
+ strbuf_init(&sb3);
while (1 < ac && av[1][0] == '-') {
if (av[1][1] == 'R')
- reverse = 1;
+ reverse_diff = 1;
else if (av[1][1] == 'z')
- line_termination = 0;
- else if (av[1][1] == 'r')
- detect_rename = 1;
+ line_termination = inter_name_termination = 0;
+ else if (av[1][1] == 'p') /* hidden from the help */
+ diff_output_style = DIFF_FORMAT_HUMAN;
+ else if (av[1][1] == 'P') /* hidden from the help */
+ diff_output_style = DIFF_FORMAT_MACHINE;
+ else if (av[1][1] == 'M') {
+ detect_rename = DIFF_DETECT_RENAME;
+ diff_score_opt = diff_scoreopt_parse(av[1]);
+ }
+ else if (av[1][1] == 'C') {
+ detect_rename = DIFF_DETECT_COPY;
+ diff_score_opt = diff_scoreopt_parse(av[1]);
+ }
+ else if (av[1][1] == 'S') {
+ pickaxe = av[1] + 2;
+ }
else
usage(diff_helper_usage);
ac--; av++;
}
/* the remaining parameters are paths patterns */
+ diff_setup(reverse_diff);
while (1) {
int status;
- read_line(&sb, stdin, line_termination);
- if (sb.eof)
+ read_line(&sb1, stdin, line_termination);
+ if (sb1.eof)
break;
- status = parse_diff_raw_output(sb.buf, av+1, ac-1, reverse);
- if (status)
- fprintf(stderr, "cannot parse %s\n", sb.buf);
+ switch (sb1.buf[0]) {
+ case 'U':
+ diff_unmerge(sb1.buf + 2);
+ continue;
+ case ':':
+ break;
+ default:
+ goto unrecognized;
+ }
+ if (!line_termination) {
+ read_line(&sb2, stdin, line_termination);
+ if (sb2.eof)
+ break;
+ read_line(&sb3, stdin, line_termination);
+ if (sb3.eof)
+ break;
+ status = parse_diff_raw(sb1.buf+1, sb2.buf, sb3.buf);
+ }
+ else
+ status = parse_diff_raw(sb1.buf+1, NULL, NULL);
+ if (status) {
+ unrecognized:
+ diff_flush(diff_output_style);
+ printf("%s%c", sb1.buf, line_termination);
+ }
}
-
if (detect_rename)
- flush_renames(av+1, ac-1, reverse);
+ diffcore_rename(detect_rename, diff_score_opt);
+ diffcore_prune();
+ if (pickaxe)
+ diffcore_pickaxe(pickaxe);
+ if (ac)
+ diffcore_pathspec(av + 1);
+ diff_flush(diff_output_style);
return 0;
}
projects / git.git / blobdiff