Prepending prefix to pathspec is a trick to workaround the fact that
commands can be executed in a subdirectory, but all git commands run
at worktree's root. The prefix part should always be treated as
literal string. Make it so.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
cache.h | 2 ++
path.c | 15 ++++++++++++++-
pathspec.c | 21 +++++++++++++++++----
pathspec.h | 2 +-
setup.c | 24 ++++++++++++++++++++----
5 files changed, 54 insertions(+), 10 deletions(-)
diff --git a/cache.h b/cache.h
index b3d8b29..276330e 100644
--- a/cache.h
+++ b/cache.h
@@ -408,6 +408,7 @@ extern void setup_work_tree(void);
extern const char *setup_git_directory_gently(int *);
extern const char *setup_git_directory(void);
extern char *prefix_path(const char *prefix, int len, const char *path);
+extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
extern const char *prefix_filename(const char *prefix, int len, const char *path);
extern int check_filename(const char *prefix, const char *name);
extern void verify_filename(const char *prefix,
@@ -720,6 +721,7 @@ const char *real_path(const char *path);
const char *real_path_if_valid(const char *path);
const char *absolute_path(const char *path);
const char *relative_path(const char *abs, const char *base);
+int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
int normalize_path_copy(char *dst, const char *src);
int longest_ancestor_length(const char *path, struct string_list *prefixes);
char *strip_path_suffix(const char *path, const char *suffix);
diff --git a/path.c b/path.c
index 04ff148..f4b49d6 100644
--- a/path.c
+++ b/path.c
@@ -492,8 +492,14 @@ const char *relative_path(const char *abs, const char *base)
*
* 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;
@@ -568,11 +574,18 @@ int normalize_path_copy(char *dst, const char *src)
/* 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
* prefixes = string_list containing normalized, absolute paths without
diff --git a/pathspec.c b/pathspec.c
index 17f25d6..e2ee268 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -150,10 +150,14 @@ static unsigned prefix_pathspec(struct pathspec_item *item,
magic |= short_magic;
*p_short_magic = short_magic;
- if (magic & PATHSPEC_FROMTOP)
+ if (magic & PATHSPEC_FROMTOP) {
match = xstrdup(copyfrom);
- else
- match = prefix_path(prefix, prefixlen, copyfrom);
+ prefixlen = 0;
+ } else {
+ match = prefix_path_gently(prefix, prefixlen, &prefixlen, copyfrom);
+ if (!match)
+ die(_("%s: '%s' is outside repository"), elt, copyfrom);
+ }
*raw = item->match = match;
/*
* Prefix the pathspec (keep all magic) and put to
@@ -167,6 +171,7 @@ static unsigned prefix_pathspec(struct pathspec_item *item,
} else
item->original = elt;
item->len = strlen(item->match);
+ item->prefix = prefixlen;
if ((flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP) &&
(item->len >= 1 && item->match[item->len - 1] == '/') &&
@@ -198,13 +203,20 @@ static unsigned prefix_pathspec(struct pathspec_item *item,
if (limit_pathspec_to_literal())
item->nowildcard_len = item->len;
- else
+ else {
item->nowildcard_len = simple_length(item->match);
+ if (item->nowildcard_len < prefixlen)
+ item->nowildcard_len = prefixlen;
+ }
item->flags = 0;
if (item->nowildcard_len < item->len &&
item->match[item->nowildcard_len] == '*' &&
no_wildcard(item->match + item->nowildcard_len + 1))
item->flags |= PATHSPEC_ONESTAR;
+
+ /* sanity checks, pathspec matchers assume these are sane */
+ assert(item->nowildcard_len <= item->len &&
+ item->prefix <= item->len);
return magic;
}
@@ -284,6 +296,7 @@ void parse_pathspec(struct pathspec *pathspec,
item->match = prefix;
item->original = prefix;
item->nowildcard_len = item->len = strlen(prefix);
+ item->prefix = item->len;
raw[0] = prefix;
raw[1] = NULL;
pathspec->nr = 1;
diff --git a/pathspec.h b/pathspec.h
index 16bbb7b..bbcfa74 100644
--- a/pathspec.h
+++ b/pathspec.h
@@ -21,7 +21,7 @@ struct pathspec {
const char *match;
const char *original;
unsigned magic;
- int len;
+ int len, prefix;
int nowildcard_len;
int flags;
} *items;
diff --git a/setup.c b/setup.c
index d1ece5d..ff4499e 100644
--- a/setup.c
+++ b/setup.c
@@ -5,7 +5,19 @@
static int inside_git_dir = -1;
static int inside_work_tree = -1;
-static char *prefix_path_gently(const char *prefix, int len, const char *path)
+/*
+ * Normalize "path", prepending the "prefix" for relative paths. If
+ * remaining_prefix is not NULL, return the actual prefix still
+ * remains in the path. For example, prefix = sub1/sub2/ and path is
+ *
+ * foo -> sub1/sub2/foo (full prefix)
+ * ../foo -> sub1/foo (remaining prefix is sub1/)
+ * ../../bar -> bar (no remaining prefix)
+ * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
+ * `pwd`/../bar -> sub1/bar (no remaining prefix)
+ */
+char *prefix_path_gently(const char *prefix, int len,
+ int *remaining_prefix, const char *path)
{
const char *orig = path;
char *sanitized;
@@ -13,13 +25,17 @@ static char *prefix_path_gently(const char *prefix, int len, const char *path)
const char *temp = real_path(path);
sanitized = xmalloc(len + strlen(temp) + 1);
strcpy(sanitized, temp);
+ if (remaining_prefix)
+ *remaining_prefix = 0;
} else {
sanitized = xmalloc(len + strlen(path) + 1);
if (len)
memcpy(sanitized, prefix, len);
strcpy(sanitized + len, path);
+ if (remaining_prefix)
+ *remaining_prefix = len;
}
- if (normalize_path_copy(sanitized, sanitized))
+ if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix))
goto error_out;
if (is_absolute_path(orig)) {
size_t root_len, len, total;
@@ -44,7 +60,7 @@ static char *prefix_path_gently(const char *prefix, int len, const char *path)
char *prefix_path(const char *prefix, int len, const char *path)
{
- char *r = prefix_path_gently(prefix, len, path);
+ char *r = prefix_path_gently(prefix, len, NULL, path);
if (!r)
die("'%s' is outside repository", path);
return r;
@@ -53,7 +69,7 @@ char *prefix_path(const char *prefix, int len, const char *path)
int path_inside_repo(const char *prefix, const char *path)
{
int len = prefix ? strlen(prefix) : 0;
- char *r = prefix_path_gently(prefix, len, path);
+ char *r = prefix_path_gently(prefix, len, NULL, path);
if (r) {
free(r);
return 1;
--
1.8.2.83.gc99314b
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