X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=diff-helper.c;h=3fa50ee75b510c5396fe004160f80ddbe4955ca1;hb=5bdac8b3269aea963c3192c93c26c1524def5464;hp=2877ddc4df85179c03cdcc8c7a66831951ec5d97;hpb=e11b29c50c985f86f730893c71b0f8bd6f26c33a;p=git.git

diff --git a/diff-helper.c b/diff-helper.c
index 2877ddc4..3fa50ee7 100644
--- a/diff-helper.c
+++ b/diff-helper.c
@@ -1,279 +1,154 @@
 /*
  * Copyright (C) 2005 Junio C Hamano
  */
-#include <limits.h>
 #include "cache.h"
 #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;
-
-/*
- * 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)
-{
-	/* 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);
-		}
-	}
-}
+static const char *pickaxe = NULL;
+static int pickaxe_opts = 0;
+static const char *orderfile = NULL;
+static const char *diff_filter = NULL;
+static int line_termination = '\n';
+static int inter_name_termination = '\t';
 
-static int parse_oneside_change(const char *cp, struct diff_spec *one,
-				char *path)
+static void flush_them(int ac, const char **av)
 {
-	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');
-		cp++;
-	}
-
-	if (strncmp(cp, "\tblob\t", 6))
-		return -1;
-	cp += 6;
-	if (get_sha1_hex(cp, one->blob_sha1))
-		return -1;
-	cp += 40;
-	if (*cp++ != '\t')
-		return -1;
-	strcpy(path, cp);
-	return 0;
+	diffcore_std_no_resolve(av + 1,
+				pickaxe, pickaxe_opts,
+				orderfile, diff_filter);
+	diff_flush(DIFF_FORMAT_PATCH, '\n');
 }
 
-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:
-		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);
-	}
-	return 0;
-}
-
-static const char *diff_helper_usage =
-	"git-diff-helper [-r] [-R] [-z] paths...";
+static const char diff_helper_usage[] =
+"git-diff-helper [-z] [-O<orderfile>] [-S<string>] [--pickaxe-all] [<path>...]";
 
 int main(int ac, const char **av) {
 	struct strbuf sb;
-	int reverse = 0;
-	int line_termination = '\n';
+	const char *garbage_flush_format;
 
 	strbuf_init(&sb);
 
 	while (1 < ac && av[1][0] == '-') {
-		if (av[1][1] == 'R')
-			reverse = 1;
-		else if (av[1][1] == 'z')
-			line_termination = 0;
-		else if (av[1][1] == 'r')
-			detect_rename = 1;
+		if (av[1][1] == 'z')
+			line_termination = inter_name_termination = 0;
+		else if (av[1][1] == 'S') {
+			pickaxe = av[1] + 2;
+		}
+		else if (!strcmp(av[1], "--pickaxe-all"))
+			pickaxe_opts = DIFF_PICKAXE_ALL;
+		else if (!strncmp(av[1], "--diff-filter=", 14))
+			diff_filter = av[1] + 14;
+		else if (!strncmp(av[1], "-O", 2))
+			orderfile = av[1] + 2;
 		else
 			usage(diff_helper_usage);
 		ac--; av++;
 	}
+	garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n";
+
 	/* the remaining parameters are paths patterns */
 
+	diff_setup(0);
 	while (1) {
-		int status;
+		unsigned old_mode, new_mode;
+		unsigned char old_sha1[20], new_sha1[20];
+		char old_path[PATH_MAX];
+		int status, score, two_paths;
+		char new_path[PATH_MAX];
+
+		int ch;
+		char *cp, *ep;
+
 		read_line(&sb, stdin, line_termination);
 		if (sb.eof)
 			break;
-		status = parse_diff_raw_output(sb.buf, av+1, ac-1, reverse);
-		if (status) {
-			flush_renames(av+1, ac-1, reverse);
-			printf("%s%c", sb.buf, line_termination);
+		switch (sb.buf[0]) {
+		case ':':
+			/* parse the first part up to the status */
+			cp = sb.buf + 1;
+			old_mode = new_mode = 0;
+			while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
+				old_mode = (old_mode << 3) | (ch - '0');
+				cp++;
+			}
+			if (*cp++ != ' ')
+				break;
+			while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
+				new_mode = (new_mode << 3) | (ch - '0');
+				cp++;
+			}
+			if (*cp++ != ' ')
+				break;
+			if (get_sha1_hex(cp, old_sha1))
+				break;
+			cp += 40;
+			if (*cp++ != ' ')
+				break;
+			if (get_sha1_hex(cp, new_sha1))
+				break;
+			cp += 40;
+			if (*cp++ != ' ')
+				break;
+			status = *cp++;
+			if (!strchr("MCRNDU", status))
+				break;
+			two_paths = score = 0;
+			if (status == DIFF_STATUS_RENAMED ||
+			    status == DIFF_STATUS_COPIED)
+				two_paths = 1;
+
+			/* pick up score if exists */
+			if (sscanf(cp, "%d", &score) != 1)
+				score = 0;
+			cp = strchr(cp,
+				    inter_name_termination);
+			if (!cp)
+				break;
+			if (*cp++ != inter_name_termination)
+				break;
+
+			/* first pathname */
+			if (!line_termination) {
+				read_line(&sb, stdin, line_termination);
+				if (sb.eof)
+					break;
+				strcpy(old_path, sb.buf);
+			}
+			else if (!two_paths)
+				strcpy(old_path, cp);
+			else {
+				ep = strchr(cp, inter_name_termination);
+				if (!ep)
+					break;
+				strncpy(old_path, cp, ep-cp);
+				old_path[ep-cp] = 0;
+				cp = ep + 1;
+			}
+
+			/* second pathname */
+			if (!two_paths)
+				strcpy(new_path, old_path);
+			else {
+				if (!line_termination) {
+					read_line(&sb, stdin,
+						  line_termination);
+					if (sb.eof)
+						break;
+					strcpy(new_path, sb.buf);
+				}
+				else
+					strcpy(new_path, cp);
+			}
+			diff_helper_input(old_mode, new_mode,
+					  old_sha1, new_sha1,
+					  old_path, status, score,
+					  new_path);
+			continue;
 		}
+		flush_them(ac, av);
+		printf(garbage_flush_format, sb.buf);
 	}
-
-	flush_renames(av+1, ac-1, reverse);
+	flush_them(ac, av);
 	return 0;
 }