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-rw-r--r--apply.c228
1 files changed, 184 insertions, 44 deletions
diff --git a/apply.c b/apply.c
index f4d00f2835..a7ab972940 100644
--- a/apply.c
+++ b/apply.c
@@ -8,12 +8,13 @@
*/
#include <fnmatch.h>
#include "cache.h"
+#include "quote.h"
// --check turns on checking that the working tree matches the
// files that are being modified, but doesn't apply the patch
// --stat does just a diffstat, and doesn't actually apply
// --show-files shows the directory changes
-// --show-index-info shows the old and new index info for paths if available.
+// --index-info shows the old and new index info for paths if available.
//
static int check_index = 0;
static int write_index = 0;
@@ -23,8 +24,9 @@ static int check = 0;
static int apply = 1;
static int show_files = 0;
static int show_index_info = 0;
+static int line_termination = '\n';
static const char apply_usage[] =
-"git-apply [--stat] [--summary] [--check] [--index] [--apply] [--show-files] [--show-index-info] <patch>...";
+"git-apply [--stat] [--summary] [--check] [--index] [--apply] [--show-files] [--index-info] [-z] <patch>...";
/*
* For "diff-stat" like behaviour, we keep track of the biggest change
@@ -135,6 +137,35 @@ static char * find_name(const char *line, char *def, int p_value, int terminate)
const char *start = line;
char *name;
+ if (*line == '"') {
+ /* Proposed "new-style" GNU patch/diff format; see
+ * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
+ */
+ name = unquote_c_style(line, NULL);
+ if (name) {
+ char *cp = name;
+ while (p_value) {
+ cp = strchr(name, '/');
+ if (!cp)
+ break;
+ cp++;
+ p_value--;
+ }
+ if (cp) {
+ /* name can later be freed, so we need
+ * to memmove, not just return cp
+ */
+ memmove(name, cp, strlen(cp) + 1);
+ free(def);
+ return name;
+ }
+ else {
+ free(name);
+ name = NULL;
+ }
+ }
+ }
+
for (;;) {
char c = *line;
@@ -224,37 +255,29 @@ static int gitdiff_hdrend(const char *line, struct patch *patch)
*/
static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
{
- int len;
- const char *name;
-
if (!orig_name && !isnull)
return find_name(line, NULL, 1, 0);
- name = "/dev/null";
- len = 9;
if (orig_name) {
+ int len;
+ const char *name;
+ char *another;
name = orig_name;
len = strlen(name);
if (isnull)
die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
- }
-
- if (*name == '/')
- goto absolute_path;
-
- for (;;) {
- char c = *line++;
- if (c == '\n')
- break;
- if (c != '/')
- continue;
-absolute_path:
- if (memcmp(line, name, len) || line[len] != '\n')
- break;
+ another = find_name(line, NULL, 1, 0);
+ if (!another || memcmp(another, name, len))
+ die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
+ free(another);
return orig_name;
}
- die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
- return NULL;
+ else {
+ /* expect "/dev/null" */
+ if (memcmp("/dev/null", line, 9) || line[9] != '\n')
+ die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
+ return NULL;
+ }
}
static int gitdiff_oldname(const char *line, struct patch *patch)
@@ -378,29 +401,124 @@ static int gitdiff_unrecognized(const char *line, struct patch *patch)
return -1;
}
-static char *git_header_name(char *line)
+static const char *stop_at_slash(const char *line, int llen)
+{
+ int i;
+
+ for (i = 0; i < llen; i++) {
+ int ch = line[i];
+ if (ch == '/')
+ return line + i;
+ }
+ return NULL;
+}
+
+/* This is to extract the same name that appears on "diff --git"
+ * line. We do not find and return anything if it is a rename
+ * patch, and it is OK because we will find the name elsewhere.
+ * We need to reliably find name only when it is mode-change only,
+ * creation or deletion of an empty file. In any of these cases,
+ * both sides are the same name under a/ and b/ respectively.
+ */
+static char *git_header_name(char *line, int llen)
{
int len;
- char *name, *second;
+ const char *name;
+ const char *second = NULL;
- /*
- * Find the first '/'
- */
- name = line;
- for (;;) {
- char c = *name++;
- if (c == '\n')
+ line += strlen("diff --git ");
+ llen -= strlen("diff --git ");
+
+ if (*line == '"') {
+ const char *cp;
+ char *first = unquote_c_style(line, &second);
+ if (!first)
return NULL;
- if (c == '/')
- break;
+
+ /* advance to the first slash */
+ cp = stop_at_slash(first, strlen(first));
+ if (!cp || cp == first) {
+ /* we do not accept absolute paths */
+ free_first_and_fail:
+ free(first);
+ return NULL;
+ }
+ len = strlen(cp+1);
+ memmove(first, cp+1, len+1); /* including NUL */
+
+ /* second points at one past closing dq of name.
+ * find the second name.
+ */
+ while ((second < line + llen) && isspace(*second))
+ second++;
+
+ if (line + llen <= second)
+ goto free_first_and_fail;
+ if (*second == '"') {
+ char *sp = unquote_c_style(second, NULL);
+ if (!sp)
+ goto free_first_and_fail;
+ cp = stop_at_slash(sp, strlen(sp));
+ if (!cp || cp == sp) {
+ free_both_and_fail:
+ free(sp);
+ goto free_first_and_fail;
+ }
+ /* They must match, otherwise ignore */
+ if (strcmp(cp+1, first))
+ goto free_both_and_fail;
+ free(sp);
+ return first;
+ }
+
+ /* unquoted second */
+ cp = stop_at_slash(second, line + llen - second);
+ if (!cp || cp == second)
+ goto free_first_and_fail;
+ cp++;
+ if (line + llen - cp != len + 1 ||
+ memcmp(first, cp, len))
+ goto free_first_and_fail;
+ return first;
}
- /*
- * We don't accept absolute paths (/dev/null) as possibly valid
- */
- if (name == line+1)
+ /* unquoted first name */
+ name = stop_at_slash(line, llen);
+ if (!name || name == line)
return NULL;
+ name++;
+
+ /* since the first name is unquoted, a dq if exists must be
+ * the beginning of the second name.
+ */
+ for (second = name; second < line + llen; second++) {
+ if (*second == '"') {
+ const char *cp = second;
+ const char *np;
+ char *sp = unquote_c_style(second, NULL);
+
+ if (!sp)
+ return NULL;
+ np = stop_at_slash(sp, strlen(sp));
+ if (!np || np == sp) {
+ free_second_and_fail:
+ free(sp);
+ return NULL;
+ }
+ np++;
+ len = strlen(np);
+ if (len < cp - name &&
+ !strncmp(np, name, len) &&
+ isspace(name[len])) {
+ /* Good */
+ memmove(sp, np, len + 1);
+ return sp;
+ }
+ goto free_second_and_fail;
+ }
+ }
+
/*
* Accept a name only if it shows up twice, exactly the same
* form.
@@ -448,7 +566,7 @@ static int parse_git_header(char *line, int len, unsigned int size, struct patch
* or removing or adding empty files), so we get
* the default name from the header.
*/
- patch->def_name = git_header_name(line + strlen("diff --git "));
+ patch->def_name = git_header_name(line, len);
line += len;
size -= len;
@@ -785,11 +903,18 @@ static void show_stats(struct patch *patch)
{
const char *prefix = "";
char *name = patch->new_name;
+ char *qname = NULL;
int len, max, add, del, total;
if (!name)
name = patch->old_name;
+ if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
+ qname = xmalloc(len + 1);
+ quote_c_style(name, qname, NULL, 0);
+ name = qname;
+ }
+
/*
* "scale" the filename
*/
@@ -827,6 +952,8 @@ static void show_stats(struct patch *patch)
printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
len, name, patch->lines_added + patch->lines_deleted,
add, pluses, del, minuses);
+ if (qname)
+ free(qname);
}
static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
@@ -1197,8 +1324,13 @@ static void show_index_list(struct patch *list)
name);
else
sha1_ptr = sha1;
- printf("%06o %s %s\n",patch->old_mode,
- sha1_to_hex(sha1_ptr), name);
+
+ printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr));
+ if (line_termination && quote_c_style(name, NULL, NULL, 0))
+ quote_c_style(name, NULL, stdout, 0);
+ else
+ fputs(name, stdout);
+ putchar(line_termination);
}
}
@@ -1301,12 +1433,16 @@ static void patch_stats(struct patch *patch)
if (lines > max_change)
max_change = lines;
if (patch->old_name) {
- int len = strlen(patch->old_name);
+ int len = quote_c_style(patch->old_name, NULL, NULL, 0);
+ if (!len)
+ len = strlen(patch->old_name);
if (len > max_len)
max_len = len;
}
if (patch->new_name) {
- int len = strlen(patch->new_name);
+ int len = quote_c_style(patch->new_name, NULL, NULL, 0);
+ if (!len)
+ len = strlen(patch->new_name);
if (len > max_len)
max_len = len;
}
@@ -1603,11 +1739,15 @@ int main(int argc, char **argv)
show_files = 1;
continue;
}
- if (!strcmp(arg, "--show-index-info")) {
+ if (!strcmp(arg, "--index-info")) {
apply = 0;
show_index_info = 1;
continue;
}
+ if (!strcmp(arg, "-z")) {
+ line_termination = 0;
+ continue;
+ }
fd = open(arg, O_RDONLY);
if (fd < 0)
usage(apply_usage);
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