diff options
-rw-r--r-- | setup.c | 94 | ||||
-rwxr-xr-x | t/t0060-path-utils.sh | 21 | ||||
-rwxr-xr-x | t/t3004-ls-files-basic.sh | 17 |
3 files changed, 112 insertions, 20 deletions
@@ -6,6 +6,70 @@ static int inside_git_dir = -1; static int inside_work_tree = -1; /* + * The input parameter must contain an absolute path, and it must already be + * normalized. + * + * Find the part of an absolute path that lies inside the work tree by + * dereferencing symlinks outside the work tree, for example: + * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file + * /dir/file (work tree is /) -> dir/file + * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 + * /dir/repolink/file (repolink points to /dir/repo) -> file + * /dir/repo (exactly equal to work tree) -> (empty string) + */ +static int abspath_part_inside_repo(char *path) +{ + size_t len; + size_t wtlen; + char *path0; + int off; + const char *work_tree = get_git_work_tree(); + + if (!work_tree) + return -1; + wtlen = strlen(work_tree); + len = strlen(path); + off = offset_1st_component(path); + + /* check if work tree is already the prefix */ + if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { + if (path[wtlen] == '/') { + memmove(path, path + wtlen + 1, len - wtlen); + return 0; + } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { + /* work tree is the root, or the whole path */ + memmove(path, path + wtlen, len - wtlen + 1); + return 0; + } + /* work tree might match beginning of a symlink to work tree */ + off = wtlen; + } + path0 = path; + path += off; + + /* check each '/'-terminated level */ + while (*path) { + path++; + if (*path == '/') { + *path = '\0'; + if (strcmp(real_path(path0), work_tree) == 0) { + memmove(path0, path + 1, len - (path - path0)); + return 0; + } + *path = '/'; + } + } + + /* check whole path */ + if (strcmp(real_path(path0), work_tree) == 0) { + *path0 = '\0'; + return 0; + } + + return -1; +} + +/* * 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 @@ -22,11 +86,17 @@ char *prefix_path_gently(const char *prefix, int len, const char *orig = path; char *sanitized; if (is_absolute_path(orig)) { - const char *temp = real_path(path); - sanitized = xmalloc(len + strlen(temp) + 1); - strcpy(sanitized, temp); + sanitized = xmalloc(strlen(path) + 1); if (remaining_prefix) *remaining_prefix = 0; + if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { + free(sanitized); + return NULL; + } + if (abspath_part_inside_repo(sanitized)) { + free(sanitized); + return NULL; + } } else { sanitized = xmalloc(len + strlen(path) + 1); if (len) @@ -34,26 +104,10 @@ char *prefix_path_gently(const char *prefix, int len, strcpy(sanitized + len, path); if (remaining_prefix) *remaining_prefix = len; - } - if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) - goto error_out; - if (is_absolute_path(orig)) { - size_t root_len, len, total; - const char *work_tree = get_git_work_tree(); - if (!work_tree) - goto error_out; - len = strlen(work_tree); - root_len = offset_1st_component(work_tree); - total = strlen(sanitized) + 1; - if (strncmp(sanitized, work_tree, len) || - (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) { - error_out: + if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { free(sanitized); return NULL; } - if (sanitized[len] == '/') - len++; - memmove(sanitized, sanitized + len, total - len); } return sanitized; } diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh index 07c10c8dca..c0143a0a70 100755 --- a/t/t0060-path-utils.sh +++ b/t/t0060-path-utils.sh @@ -190,6 +190,27 @@ test_expect_success SYMLINKS 'real path works on symlinks' ' test "$sym" = "$(test-path-utils real_path "$dir2/syml")" ' +test_expect_success SYMLINKS 'prefix_path works with absolute paths to work tree symlinks' ' + ln -s target symlink && + test "$(test-path-utils prefix_path prefix "$(pwd)/symlink")" = "symlink" +' + +test_expect_success 'prefix_path works with only absolute path to work tree' ' + echo "" >expected && + test-path-utils prefix_path prefix "$(pwd)" >actual && + test_cmp expected actual +' + +test_expect_success 'prefix_path rejects absolute path to dir with same beginning as work tree' ' + test_must_fail test-path-utils prefix_path prefix "$(pwd)a" +' + +test_expect_success SYMLINKS 'prefix_path works with absolute path to a symlink to work tree having same beginning as work tree' ' + git init repo && + ln -s repo repolink && + test "a" = "$(cd repo && test-path-utils prefix_path prefix "$(pwd)/../repolink/a")" +' + relative_path /foo/a/b/c/ /foo/a/b/ c/ relative_path /foo/a/b/c/ /foo/a/b c/ relative_path /foo/a//b//c/ ///foo/a/b// c/ POSIX diff --git a/t/t3004-ls-files-basic.sh b/t/t3004-ls-files-basic.sh index 8d9bc3c2af..9c7adbdbe1 100755 --- a/t/t3004-ls-files-basic.sh +++ b/t/t3004-ls-files-basic.sh @@ -36,4 +36,21 @@ test_expect_success 'ls-files -h in corrupt repository' ' test_i18ngrep "[Uu]sage: git ls-files " broken/usage ' +test_expect_success SYMLINKS 'ls-files with absolute paths to symlinks' ' + mkdir subs && + ln -s nosuch link && + ln -s ../nosuch subs/link && + git add link subs/link && + git ls-files -s link subs/link >expect && + git ls-files -s "$(pwd)/link" "$(pwd)/subs/link" >actual && + test_cmp expect actual && + + ( + cd subs && + git ls-files -s link >../expect && + git ls-files -s "$(pwd)/link" >../actual + ) && + test_cmp expect actual +' + test_done |