*/
#include <sys/types.h>
#include <sys/wait.h>
+#include <signal.h>
#include "cache.h"
#include "diff.h"
-static char *diff_cmd = "diff -L'k/%s' -L'l/%s'";
static char *diff_opts = "-pu";
static const char *external_diff(void)
* alternative styles you can specify via environment
* variables are:
*
- * GIT_DIFF_CMD="diff -L '%s' -L '%s'"
* GIT_DIFF_OPTS="-c";
*/
if (getenv("GIT_EXTERNAL_DIFF"))
external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
/* In case external diff fails... */
- diff_cmd = getenv("GIT_DIFF_CMD") ? : diff_cmd;
diff_opts = getenv("GIT_DIFF_OPTS") ? : diff_opts;
done_preparing = 1;
static void builtin_diff(const char *name,
struct diff_tempfile *temp)
{
- static char *diff_arg = "'%s' '%s'";
- const char *name_1_sq = sq_expand(temp[0].name);
- const char *name_2_sq = sq_expand(temp[1].name);
+ int i, next_at;
+ const char *diff_cmd = "diff -L'%s%s' -L'%s%s'";
+ const char *diff_arg = "'%s' '%s'";
+ const char *input_name_sq[2];
+ const char *path0[2];
+ const char *path1[2];
const char *name_sq = sq_expand(name);
-
- /* diff_cmd and diff_arg have 4 %s in total which makes
- * the sum of these strings 8 bytes larger than required.
+ char *cmd;
+
+ /* diff_cmd and diff_arg have 6 %s in total which makes
+ * the sum of these strings 12 bytes larger than required.
* we use 2 spaces around diff-opts, and we need to count
- * terminating NUL, so we subtract 5 here.
+ * terminating NUL, so we subtract 9 here.
*/
- int cmd_size = (strlen(diff_cmd) +
- strlen(name_sq) * 2 +
- strlen(diff_opts) +
- strlen(diff_arg) +
- strlen(name_1_sq) + strlen(name_2_sq)
- - 5);
- char *cmd = xmalloc(cmd_size);
- int next_at = 0;
+ int cmd_size = (strlen(diff_cmd) + strlen(diff_opts) +
+ strlen(diff_arg) - 9);
+ for (i = 0; i < 2; i++) {
+ input_name_sq[i] = sq_expand(temp[i].name);
+ if (!strcmp(temp[i].name, "/dev/null")) {
+ path0[i] = "/dev/null";
+ path1[i] = "";
+ } else {
+ path0[i] = i ? "l/" : "k/";
+ path1[i] = name_sq;
+ }
+ cmd_size += (strlen(path0[i]) + strlen(path1[i]) +
+ strlen(input_name_sq[i]));
+ }
+
+ cmd = xmalloc(cmd_size);
+ next_at = 0;
next_at += snprintf(cmd+next_at, cmd_size-next_at,
- diff_cmd, name_sq, name_sq);
+ diff_cmd,
+ path0[0], path1[0], path0[1], path1[1]);
next_at += snprintf(cmd+next_at, cmd_size-next_at,
" %s ", diff_opts);
next_at += snprintf(cmd+next_at, cmd_size-next_at,
- diff_arg, name_1_sq, name_2_sq);
+ diff_arg, input_name_sq[0], input_name_sq[1]);
+
+ if (!path1[0][0])
+ printf("Created: %s (mode:%s)\n", name, temp[1].mode);
+ else if (!path1[1][0])
+ printf("Deleted: %s\n", name);
+ else if (strcmp(temp[0].mode, temp[1].mode))
+ printf("Mode changed: %s (%s->%s)\n", name,
+ temp[0].mode, temp[1].mode);
+ fflush(NULL);
execlp("/bin/sh","sh", "-c", cmd, NULL);
}
if (!one->file_valid) {
not_a_valid_file:
+ /* A '-' entry produces this for file-2, and
+ * a '+' entry produces this for file-1.
+ */
temp->name = "/dev/null";
strcpy(temp->hex, ".");
strcpy(temp->mode, ".");
goto not_a_valid_file;
die("stat(%s): %s", temp->name, strerror(errno));
}
- strcpy(temp->hex, ".");
+ strcpy(temp->hex, sha1_to_hex(null_sha1));
sprintf(temp->mode, "%06o",
S_IFREG |ce_permissions(st.st_mode));
}
}
}
+static void remove_tempfile_on_signal(int signo)
+{
+ remove_tempfile();
+}
+
/* An external diff command takes:
*
* diff-cmd name infile1 infile1-sha1 infile1-mode \
struct diff_spec *two)
{
struct diff_tempfile *temp = diff_temp;
- int pid, status;
+ pid_t pid;
+ int status;
static int atexit_asked = 0;
- prepare_temp_file(name, &temp[0], one);
- prepare_temp_file(name, &temp[1], two);
- if (! atexit_asked &&
- (temp[0].name == temp[0].tmp_path ||
- temp[1].name == temp[1].tmp_path)) {
- atexit_asked = 1;
- atexit(remove_tempfile);
+ if (one && two) {
+ prepare_temp_file(name, &temp[0], one);
+ prepare_temp_file(name, &temp[1], two);
+ if (! atexit_asked &&
+ (temp[0].name == temp[0].tmp_path ||
+ temp[1].name == temp[1].tmp_path)) {
+ atexit_asked = 1;
+ atexit(remove_tempfile);
+ }
+ signal(SIGINT, remove_tempfile_on_signal);
}
fflush(NULL);
die("unable to fork");
if (!pid) {
const char *pgm = external_diff();
- if (pgm)
- execlp(pgm, pgm,
- name,
- temp[0].name, temp[0].hex, temp[0].mode,
- temp[1].name, temp[1].hex, temp[1].mode,
- NULL);
+ if (pgm) {
+ if (one && two)
+ execlp(pgm, pgm,
+ name,
+ temp[0].name, temp[0].hex, temp[0].mode,
+ temp[1].name, temp[1].hex, temp[1].mode,
+ NULL);
+ else
+ execlp(pgm, pgm, name, NULL);
+ }
/*
* otherwise we use the built-in one.
*/
- builtin_diff(name, temp);
+ if (one && two)
+ builtin_diff(name, temp);
+ else
+ printf("* Unmerged path %s\n", name);
exit(0);
}
- if (waitpid(pid, &status, 0) < 0 || !WIFEXITED(status))
- die("diff program failed");
-
+ if (waitpid(pid, &status, 0) < 0 || !WIFEXITED(status)) {
+ /* We do not check the exit status because typically
+ * diff exits non-zero if files are different, and
+ * we are not interested in knowing that. We *knew*
+ * they are different and that's why we ran diff
+ * in the first place! However if it dies by a signal,
+ * we stop processing immediately.
+ */
+ remove_tempfile();
+ die("external diff died unexpectedly.\n");
+ }
remove_tempfile();
}
-void show_diff_empty(const struct cache_entry *ce, int reverse)
+void diff_addremove(int addremove, unsigned mode,
+ const unsigned char *sha1,
+ const char *base, const char *path)
{
+ char concatpath[PATH_MAX];
struct diff_spec spec[2], *one, *two;
- memcpy(spec[0].u.sha1, ce->sha1, 20);
- spec[0].mode = ntohl(ce->ce_mode);
+ memcpy(spec[0].u.sha1, sha1, 20);
+ spec[0].mode = mode;
spec[0].sha1_valid = spec[0].file_valid = 1;
spec[1].file_valid = 0;
- if (reverse) {
+ if (addremove == '+') {
one = spec + 1; two = spec;
} else {
one = spec; two = one + 1;
}
-
- run_external_diff(ce->name, one, two);
+
+ if (path) {
+ strcpy(concatpath, base);
+ strcat(concatpath, path);
+ }
+ run_external_diff(path ? concatpath : base, one, two);
}
-void show_differences(const struct cache_entry *ce, int reverse)
-{
- struct diff_spec spec[2], *one, *two;
-
- memcpy(spec[0].u.sha1, ce->sha1, 20);
- spec[0].mode = ntohl(ce->ce_mode);
+void diff_change(unsigned old_mode, unsigned new_mode,
+ const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ const char *base, const char *path) {
+ char concatpath[PATH_MAX];
+ struct diff_spec spec[2];
+
+ memcpy(spec[0].u.sha1, old_sha1, 20);
+ spec[0].mode = old_mode;
+ memcpy(spec[1].u.sha1, new_sha1, 20);
+ spec[1].mode = new_mode;
spec[0].sha1_valid = spec[0].file_valid = 1;
+ spec[1].sha1_valid = spec[1].file_valid = 1;
- spec[1].u.name = ce->name; /* the name we stated */
- spec[1].sha1_valid = 0;
- spec[1].file_valid = 1;
-
- if (reverse) {
- one = spec + 1; two = spec;
- } else {
- one = spec; two = one + 1;
+ if (path) {
+ strcpy(concatpath, base);
+ strcat(concatpath, path);
}
+ run_external_diff(path ? concatpath : base, &spec[0], &spec[1]);
+}
- run_external_diff(ce->name, one, two);
+void diff_unmerge(const char *path)
+{
+ run_external_diff(path, NULL, NULL);
}
projects / git.git / blobdiff