/*
- * I'm tired of doing "vsnprintf()" etc just to open a
- * file, so here's a "return static buffer with printf"
- * interface for paths.
- *
- * It's obviously not thread-safe. Sue me. But it's quite
- * useful for doing things like
- *
- * f = open(mkpath("%s/%s.git", base, name), O_RDONLY);
- *
- * which is what it's designed for.
+ * Utilities for paths and pathnames
*/
#include "cache.h"
#include "strbuf.h"
+#include "string-list.h"
+
+static int get_st_mode_bits(const char *path, int *mode)
+{
+ struct stat st;
+ if (lstat(path, &st) < 0)
+ return -1;
+ *mode = st.st_mode;
+ return 0;
+}
static char bad_path[] = "/bad-path/";
return cleanup_path(buf);
}
-static char *git_vsnpath(char *buf, size_t n, const char *fmt, va_list args)
+static char *vsnpath(char *buf, size_t n, const char *fmt, va_list args)
{
const char *git_dir = get_git_dir();
size_t len;
char *git_snpath(char *buf, size_t n, const char *fmt, ...)
{
+ char *ret;
va_list args;
va_start(args, fmt);
- (void)git_vsnpath(buf, n, fmt, args);
+ ret = vsnpath(buf, n, fmt, args);
va_end(args);
- return buf;
+ return ret;
}
char *git_pathdup(const char *fmt, ...)
{
- char path[PATH_MAX];
+ char path[PATH_MAX], *ret;
+ va_list args;
+ va_start(args, fmt);
+ ret = vsnpath(path, sizeof(path), fmt, args);
+ va_end(args);
+ return xstrdup(ret);
+}
+
+char *mkpathdup(const char *fmt, ...)
+{
+ char *path;
+ struct strbuf sb = STRBUF_INIT;
va_list args;
+
va_start(args, fmt);
- (void)git_vsnpath(path, sizeof(path), fmt, args);
+ strbuf_vaddf(&sb, fmt, args);
va_end(args);
- return xstrdup(path);
+ path = xstrdup(cleanup_path(sb.buf));
+
+ strbuf_release(&sb);
+ return path;
}
char *mkpath(const char *fmt, ...)
char *git_path(const char *fmt, ...)
{
- const char *git_dir = get_git_dir();
char *pathname = get_pathname();
va_list args;
- unsigned len;
+ char *ret;
- len = strlen(git_dir);
- if (len > PATH_MAX-100)
- return bad_path;
- memcpy(pathname, git_dir, len);
- if (len && git_dir[len-1] != '/')
- pathname[len++] = '/';
va_start(args, fmt);
- len += vsnprintf(pathname + len, PATH_MAX - len, fmt, args);
+ ret = vsnpath(pathname, PATH_MAX, fmt, args);
va_end(args);
- if (len >= PATH_MAX)
- return bad_path;
- return cleanup_path(pathname);
+ return ret;
+}
+
+void home_config_paths(char **global, char **xdg, char *file)
+{
+ char *xdg_home = getenv("XDG_CONFIG_HOME");
+ char *home = getenv("HOME");
+ char *to_free = NULL;
+
+ if (!home) {
+ if (global)
+ *global = NULL;
+ } else {
+ if (!xdg_home) {
+ to_free = mkpathdup("%s/.config", home);
+ xdg_home = to_free;
+ }
+ if (global)
+ *global = mkpathdup("%s/.gitconfig", home);
+ }
+
+ if (!xdg_home)
+ *xdg = NULL;
+ else
+ *xdg = mkpathdup("%s/git/%s", xdg_home, file);
+
+ free(to_free);
}
char *git_path_submodule(const char *path, const char *fmt, ...)
return NULL;
}
-int set_shared_perm(const char *path, int mode)
+static int calc_shared_perm(int mode)
{
- struct stat st;
- int tweak, shared, orig_mode;
+ int tweak;
- if (!shared_repository) {
- if (mode)
- return chmod(path, mode & ~S_IFMT);
- return 0;
- }
- if (!mode) {
- if (lstat(path, &st) < 0)
- return -1;
- mode = st.st_mode;
- orig_mode = mode;
- } else
- orig_mode = 0;
if (shared_repository < 0)
- shared = -shared_repository;
+ tweak = -shared_repository;
else
- shared = shared_repository;
- tweak = shared;
+ tweak = shared_repository;
if (!(mode & S_IWUSR))
tweak &= ~0222;
else
mode |= tweak;
- if (S_ISDIR(mode)) {
+ return mode;
+}
+
+
+int adjust_shared_perm(const char *path)
+{
+ int old_mode, new_mode;
+
+ if (!shared_repository)
+ return 0;
+ if (get_st_mode_bits(path, &old_mode) < 0)
+ return -1;
+
+ new_mode = calc_shared_perm(old_mode);
+ if (S_ISDIR(old_mode)) {
/* Copy read bits to execute bits */
- mode |= (shared & 0444) >> 2;
- mode |= FORCE_DIR_SET_GID;
+ new_mode |= (new_mode & 0444) >> 2;
+ new_mode |= FORCE_DIR_SET_GID;
}
- if (((shared_repository < 0
- ? (orig_mode & (FORCE_DIR_SET_GID | 0777))
- : (orig_mode & mode)) != mode) &&
- chmod(path, (mode & ~S_IFMT)) < 0)
+ if (((old_mode ^ new_mode) & ~S_IFMT) &&
+ chmod(path, (new_mode & ~S_IFMT)) < 0)
return -2;
return 0;
}
-const char *relative_path(const char *abs, const char *base)
+static int have_same_root(const char *path1, const char *path2)
+{
+ int is_abs1, is_abs2;
+
+ is_abs1 = is_absolute_path(path1);
+ is_abs2 = is_absolute_path(path2);
+ return (is_abs1 && is_abs2 && tolower(path1[0]) == tolower(path2[0])) ||
+ (!is_abs1 && !is_abs2);
+}
+
+/*
+ * Give path as relative to prefix.
+ *
+ * The strbuf may or may not be used, so do not assume it contains the
+ * returned path.
+ */
+const char *relative_path(const char *in, const char *prefix,
+ struct strbuf *sb)
+{
+ int in_len = in ? strlen(in) : 0;
+ int prefix_len = prefix ? strlen(prefix) : 0;
+ int in_off = 0;
+ int prefix_off = 0;
+ int i = 0, j = 0;
+
+ if (!in_len)
+ return "./";
+ else if (!prefix_len)
+ return in;
+
+ if (have_same_root(in, prefix)) {
+ /* bypass dos_drive, for "c:" is identical to "C:" */
+ if (has_dos_drive_prefix(in)) {
+ i = 2;
+ j = 2;
+ }
+ } else {
+ return in;
+ }
+
+ while (i < prefix_len && j < in_len && prefix[i] == in[j]) {
+ if (is_dir_sep(prefix[i])) {
+ while (is_dir_sep(prefix[i]))
+ i++;
+ while (is_dir_sep(in[j]))
+ j++;
+ prefix_off = i;
+ in_off = j;
+ } else {
+ i++;
+ j++;
+ }
+ }
+
+ if (
+ /* "prefix" seems like prefix of "in" */
+ i >= prefix_len &&
+ /*
+ * but "/foo" is not a prefix of "/foobar"
+ * (i.e. prefix not end with '/')
+ */
+ prefix_off < prefix_len) {
+ if (j >= in_len) {
+ /* in="/a/b", prefix="/a/b" */
+ in_off = in_len;
+ } else if (is_dir_sep(in[j])) {
+ /* in="/a/b/c", prefix="/a/b" */
+ while (is_dir_sep(in[j]))
+ j++;
+ in_off = j;
+ } else {
+ /* in="/a/bbb/c", prefix="/a/b" */
+ i = prefix_off;
+ }
+ } else if (
+ /* "in" is short than "prefix" */
+ j >= in_len &&
+ /* "in" not end with '/' */
+ in_off < in_len) {
+ if (is_dir_sep(prefix[i])) {
+ /* in="/a/b", prefix="/a/b/c/" */
+ while (is_dir_sep(prefix[i]))
+ i++;
+ in_off = in_len;
+ }
+ }
+ in += in_off;
+ in_len -= in_off;
+
+ if (i >= prefix_len) {
+ if (!in_len)
+ return "./";
+ else
+ return in;
+ }
+
+ strbuf_reset(sb);
+ strbuf_grow(sb, in_len);
+
+ while (i < prefix_len) {
+ if (is_dir_sep(prefix[i])) {
+ strbuf_addstr(sb, "../");
+ while (is_dir_sep(prefix[i]))
+ i++;
+ continue;
+ }
+ i++;
+ }
+ if (!is_dir_sep(prefix[prefix_len - 1]))
+ strbuf_addstr(sb, "../");
+
+ strbuf_addstr(sb, in);
+
+ return sb->buf;
+}
+
+/*
+ * A simpler implementation of relative_path
+ *
+ * Get relative path by removing "prefix" from "in". This function
+ * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
+ * to increase performance when traversing the path to work_tree.
+ */
+const char *remove_leading_path(const char *in, const char *prefix)
{
static char buf[PATH_MAX + 1];
int i = 0, j = 0;
- if (!base || !base[0])
- return abs;
- while (base[i]) {
- if (is_dir_sep(base[i])) {
- if (!is_dir_sep(abs[j]))
- return abs;
- while (is_dir_sep(base[i]))
+ if (!prefix || !prefix[0])
+ return in;
+ while (prefix[i]) {
+ if (is_dir_sep(prefix[i])) {
+ if (!is_dir_sep(in[j]))
+ return in;
+ while (is_dir_sep(prefix[i]))
i++;
- while (is_dir_sep(abs[j]))
+ while (is_dir_sep(in[j]))
j++;
continue;
- } else if (abs[j] != base[i]) {
- return abs;
+ } else if (in[j] != prefix[i]) {
+ return in;
}
i++;
j++;
}
if (
/* "/foo" is a prefix of "/foo" */
- abs[j] &&
+ in[j] &&
/* "/foo" is not a prefix of "/foobar" */
- !is_dir_sep(base[i-1]) && !is_dir_sep(abs[j])
+ !is_dir_sep(prefix[i-1]) && !is_dir_sep(in[j])
)
- return abs;
- while (is_dir_sep(abs[j]))
+ return in;
+ while (is_dir_sep(in[j]))
j++;
- if (!abs[j])
+ if (!in[j])
strcpy(buf, ".");
else
- strcpy(buf, abs + j);
+ strcpy(buf, in + j);
return buf;
}
*
* Note that this function is purely textual. It does not follow symlinks,
* verify the existence of the path, or make any system calls.
+ *
+ * prefix_len != NULL is for a specific case of prefix_pathspec():
+ * assume that src == dst and src[0..prefix_len-1] is already
+ * normalized, any time "../" eats up to the prefix_len part,
+ * prefix_len is reduced. In the end prefix_len is the remaining
+ * prefix that has not been overridden by user pathspec.
*/
-int normalize_path_copy(char *dst, const char *src)
+int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
{
char *dst0;
/* Windows: dst[-1] cannot be backslash anymore */
while (dst0 < dst && dst[-1] != '/')
dst--;
+ if (prefix_len && *prefix_len > dst - dst0)
+ *prefix_len = dst - dst0;
}
*dst = '\0';
return 0;
}
+int normalize_path_copy(char *dst, const char *src)
+{
+ return normalize_path_copy_len(dst, src, NULL);
+}
+
/*
* path = Canonical absolute path
- * prefix_list = Colon-separated list of absolute paths
+ * prefixes = string_list containing normalized, absolute paths without
+ * trailing slashes (except for the root directory, which is denoted by "/").
*
- * Determines, for each path in prefix_list, whether the "prefix" really
+ * Determines, for each path in prefixes, whether the "prefix"
* is an ancestor directory of path. Returns the length of the longest
* ancestor directory, excluding any trailing slashes, or -1 if no prefix
- * is an ancestor. (Note that this means 0 is returned if prefix_list is
- * "/".) "/foo" is not considered an ancestor of "/foobar". Directories
+ * is an ancestor. (Note that this means 0 is returned if prefixes is
+ * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
* are not considered to be their own ancestors. path must be in a
* canonical form: empty components, or "." or ".." components are not
- * allowed. prefix_list may be null, which is like "".
+ * allowed.
*/
-int longest_ancestor_length(const char *path, const char *prefix_list)
+int longest_ancestor_length(const char *path, struct string_list *prefixes)
{
- char buf[PATH_MAX+1];
- const char *ceil, *colon;
- int len, max_len = -1;
+ int i, max_len = -1;
- if (prefix_list == NULL || !strcmp(path, "/"))
+ if (!strcmp(path, "/"))
return -1;
- for (colon = ceil = prefix_list; *colon; ceil = colon+1) {
- for (colon = ceil; *colon && *colon != PATH_SEP; colon++);
- len = colon - ceil;
- if (len == 0 || len > PATH_MAX || !is_absolute_path(ceil))
- continue;
- strlcpy(buf, ceil, len+1);
- if (normalize_path_copy(buf, buf) < 0)
- continue;
- len = strlen(buf);
- if (len > 0 && buf[len-1] == '/')
- buf[--len] = '\0';
+ for (i = 0; i < prefixes->nr; i++) {
+ const char *ceil = prefixes->items[i].string;
+ int len = strlen(ceil);
+
+ if (len == 1 && ceil[0] == '/')
+ len = 0; /* root matches anything, with length 0 */
+ else if (!strncmp(path, ceil, len) && path[len] == '/')
+ ; /* match of length len */
+ else
+ continue; /* no match */
- if (!strncmp(path, buf, len) &&
- path[len] == '/' &&
- len > max_len) {
+ if (len > max_len)
max_len = len;
- }
}
return max_len;
projects / thirdparty / git.git / blobdiff