X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=apply.c;h=cc3f12e5557d1b6c333c890d6d0209aee74742e5;hb=8e4402592574d630cdb5ab4f55a1b7131802ff72;hp=244718ca13aa58567974ea3b72d58c0365cc3c21;hpb=2cf3be1d31b322cf45640f3019a32d19a8a9b6f8;p=git.git

diff --git a/apply.c b/apply.c
index 244718ca..cc3f12e5 100644
--- a/apply.c
+++ b/apply.c
@@ -9,6 +9,7 @@
 #include <fnmatch.h>
 #include "cache.h"
 #include "quote.h"
+#include "blob.h"
 
 //  --check turns on checking that the working tree matches the
 //    files that are being modified, but doesn't apply the patch
@@ -32,7 +33,57 @@ static int no_add = 0;
 static int show_index_info = 0;
 static int line_termination = '\n';
 static const char apply_usage[] =
-"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] <patch>...";
+"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
+
+static enum whitespace_eol {
+	nowarn_whitespace,
+	warn_on_whitespace,
+	error_on_whitespace,
+	strip_whitespace,
+} new_whitespace = warn_on_whitespace;
+static int whitespace_error = 0;
+static int squelch_whitespace_errors = 5;
+static int applied_after_stripping = 0;
+static const char *patch_input_file = NULL;
+
+static void parse_whitespace_option(const char *option)
+{
+	if (!option) {
+		new_whitespace = warn_on_whitespace;
+		return;
+	}
+	if (!strcmp(option, "warn")) {
+		new_whitespace = warn_on_whitespace;
+		return;
+	}
+	if (!strcmp(option, "nowarn")) {
+		new_whitespace = nowarn_whitespace;
+		return;
+	}
+	if (!strcmp(option, "error")) {
+		new_whitespace = error_on_whitespace;
+		return;
+	}
+	if (!strcmp(option, "error-all")) {
+		new_whitespace = error_on_whitespace;
+		squelch_whitespace_errors = 0;
+		return;
+	}
+	if (!strcmp(option, "strip")) {
+		new_whitespace = strip_whitespace;
+		return;
+	}
+	die("unrecognized whitespace option '%s'", option);
+}
+
+static void set_default_whitespace_mode(const char *whitespace_option)
+{
+	if (!whitespace_option && !apply_default_whitespace) {
+		new_whitespace = (apply
+				  ? warn_on_whitespace
+				  : nowarn_whitespace);
+	}
+}
 
 /*
  * For "diff-stat" like behaviour, we keep track of the biggest change
@@ -601,7 +652,7 @@ static int parse_git_header(char *line, int len, unsigned int size, struct patch
 		len = linelen(line, size);
 		if (!len || line[len-1] != '\n')
 			break;
-		for (i = 0; i < sizeof(optable) / sizeof(optable[0]); i++) {
+		for (i = 0; i < ARRAY_SIZE(optable); i++) {
 			const struct opentry *p = optable + i;
 			int oplen = strlen(p->str);
 			if (len < oplen || memcmp(p->str, line, oplen))
@@ -643,7 +694,7 @@ static int parse_range(const char *line, int len, int offset, const char *expect
 	line += digits;
 	len -= digits;
 
-	*p2 = *p1;
+	*p2 = 1;
 	if (*line == ',') {
 		digits = parse_num(line+1, p2);
 		if (!digits)
@@ -784,7 +835,7 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s
 			patch->new_name = NULL;
 	}
 
-	if (patch->is_new != !oldlines)
+	if (patch->is_new && oldlines)
 		return error("new file depends on old contents");
 	if (patch->is_delete != !newlines) {
 		if (newlines)
@@ -815,6 +866,25 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s
 			oldlines--;
 			break;
 		case '+':
+			/*
+			 * We know len is at least two, since we have a '+' and
+			 * we checked that the last character was a '\n' above.
+			 * That is, an addition of an empty line would check
+			 * the '+' here.  Sneaky...
+			 */
+			if ((new_whitespace != nowarn_whitespace) &&
+			    isspace(line[len-2])) {
+				whitespace_error++;
+				if (squelch_whitespace_errors &&
+				    squelch_whitespace_errors <
+				    whitespace_error)
+					;
+				else {
+					fprintf(stderr, "Adds trailing whitespace.\n%s:%d:%.*s\n",
+						patch_input_file,
+						linenr, len-2, line+1);
+				}
+			}
 			added++;
 			newlines--;
 			break;
@@ -832,6 +902,8 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s
 			break;
 		}
 	}
+	if (oldlines || newlines)
+		return -1;
 	/* If a fragment ends with an incomplete line, we failed to include
 	 * it in the above loop because we hit oldlines == newlines == 0
 	 * before seeing it.
@@ -1092,6 +1164,28 @@ struct buffer_desc {
 	unsigned long alloc;
 };
 
+static int apply_line(char *output, const char *patch, int plen)
+{
+	/* plen is number of bytes to be copied from patch,
+	 * starting at patch+1 (patch[0] is '+').  Typically
+	 * patch[plen] is '\n'.
+	 */
+	int add_nl_to_tail = 0;
+	if ((new_whitespace == strip_whitespace) &&
+	    1 < plen && isspace(patch[plen-1])) {
+		if (patch[plen] == '\n')
+			add_nl_to_tail = 1;
+		plen--;
+		while (0 < plen && isspace(patch[plen]))
+			plen--;
+		applied_after_stripping++;
+	}
+	memcpy(output, patch + 1, plen);
+	if (add_nl_to_tail)
+		output[plen++] = '\n';
+	return plen;
+}
+
 static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
 {
 	char *buf = desc->buffer;
@@ -1127,10 +1221,9 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
 				break;
 		/* Fall-through for ' ' */
 		case '+':
-			if (*patch != '+' || !no_add) {
-				memcpy(new + newsize, patch + 1, plen);
-				newsize += plen;
-			}
+			if (*patch != '+' || !no_add)
+				newsize += apply_line(new + newsize, patch,
+						      plen);
 			break;
 		case '@': case '\\':
 			/* Ignore it, we already handled it */
@@ -1204,7 +1297,7 @@ static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
 			 * applies to.
 			 */
 			write_sha1_file_prepare(desc->buffer, desc->size,
-						"blob", sha1, hdr, &hdrlen);
+						blob_type, sha1, hdr, &hdrlen);
 			if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
 				return error("the patch applies to '%s' (%s), "
 					     "which does not match the "
@@ -1312,7 +1405,8 @@ static int check_patch(struct patch *patch)
 				costate.not_new = 0;
 				costate.refresh_cache = 1;
 				if (checkout_entry(active_cache[pos],
-						   &costate) ||
+						   &costate,
+						   NULL) ||
 				    lstat(old_name, &st))
 					return -1;
 			}
@@ -1566,7 +1660,7 @@ static void add_index_file(const char *path, unsigned mode, void *buf, unsigned
 	if (lstat(path, &st) < 0)
 		die("unable to stat newly created file %s", path);
 	fill_stat_cache_info(ce, &st);
-	if (write_sha1_file(buf, size, "blob", ce->sha1) < 0)
+	if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
 		die("unable to create backing store for newly created file %s", path);
 	if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
 		die("unable to add cache entry for %s", path);
@@ -1699,7 +1793,7 @@ static int use_patch(struct patch *p)
 	return 1;
 }
 
-static int apply_patch(int fd)
+static int apply_patch(int fd, const char *filename)
 {
 	int newfd;
 	unsigned long offset, size;
@@ -1707,6 +1801,7 @@ static int apply_patch(int fd)
 	struct patch *list = NULL, **listp = &list;
 	int skipped_patch = 0;
 
+	patch_input_file = filename;
 	if (!buffer)
 		return -1;
 	offset = 0;
@@ -1733,6 +1828,9 @@ static int apply_patch(int fd)
 	}
 
 	newfd = -1;
+	if (whitespace_error && (new_whitespace == error_on_whitespace))
+		apply = 0;
+
 	write_index = check_index && apply;
 	if (write_index)
 		newfd = hold_index_file_for_update(&cache_file, get_index_file());
@@ -1769,17 +1867,28 @@ static int apply_patch(int fd)
 	return 0;
 }
 
+static int git_apply_config(const char *var, const char *value)
+{
+	if (!strcmp(var, "apply.whitespace")) {
+		apply_default_whitespace = strdup(value);
+		return 0;
+	}
+	return git_default_config(var, value);
+}
+
+
 int main(int argc, char **argv)
 {
 	int i;
 	int read_stdin = 1;
+	const char *whitespace_option = NULL;
 
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
 		int fd;
 
 		if (!strcmp(arg, "-")) {
-			apply_patch(0);
+			apply_patch(0, "<stdin>");
 			read_stdin = 0;
 			continue;
 		}
@@ -1839,11 +1948,18 @@ int main(int argc, char **argv)
 			line_termination = 0;
 			continue;
 		}
+		if (!strncmp(arg, "--whitespace=", 13)) {
+			whitespace_option = arg + 13;
+			parse_whitespace_option(arg + 13);
+			continue;
+		}
 
 		if (check_index && prefix_length < 0) {
 			prefix = setup_git_directory();
 			prefix_length = prefix ? strlen(prefix) : 0;
-			git_config(git_default_config);
+			git_config(git_apply_config);
+			if (!whitespace_option && apply_default_whitespace)
+				parse_whitespace_option(apply_default_whitespace);
 		}
 		if (0 < prefix_length)
 			arg = prefix_filename(prefix, prefix_length, arg);
@@ -1852,10 +1968,38 @@ int main(int argc, char **argv)
 		if (fd < 0)
 			usage(apply_usage);
 		read_stdin = 0;
-		apply_patch(fd);
+		set_default_whitespace_mode(whitespace_option);
+		apply_patch(fd, arg);
 		close(fd);
 	}
+	set_default_whitespace_mode(whitespace_option);
 	if (read_stdin)
-		apply_patch(0);
+		apply_patch(0, "<stdin>");
+	if (whitespace_error) {
+		if (squelch_whitespace_errors &&
+		    squelch_whitespace_errors < whitespace_error) {
+			int squelched =
+				whitespace_error - squelch_whitespace_errors;
+			fprintf(stderr, "warning: squelched %d whitespace error%s\n",
+				squelched,
+				squelched == 1 ? "" : "s");
+		}
+		if (new_whitespace == error_on_whitespace)
+			die("%d line%s add%s trailing whitespaces.",
+			    whitespace_error,
+			    whitespace_error == 1 ? "" : "s",
+			    whitespace_error == 1 ? "s" : "");
+		if (applied_after_stripping)
+			fprintf(stderr, "warning: %d line%s applied after"
+				" stripping trailing whitespaces.\n",
+				applied_after_stripping,
+				applied_after_stripping == 1 ? "" : "s");
+		else if (whitespace_error)
+			fprintf(stderr, "warning: %d line%s add%s trailing"
+				" whitespaces.\n",
+				whitespace_error,
+				whitespace_error == 1 ? "" : "s",
+				whitespace_error == 1 ? "s" : "");
+	}
 	return 0;
 }