diff options
| -rw-r--r-- | builtin/clean.c | 44 | ||||
| -rw-r--r-- | builtin/rm.c | 3 | ||||
| -rw-r--r-- | builtin/stash.c | 4 | ||||
| -rw-r--r-- | cache.h | 2 | ||||
| -rw-r--r-- | common-main.c | 4 | ||||
| -rw-r--r-- | dir.c | 15 | ||||
| -rw-r--r-- | dir.h | 9 | ||||
| -rw-r--r-- | sequencer.c | 2 | ||||
| -rw-r--r-- | setup.c | 65 | ||||
| -rw-r--r-- | symlinks.c | 8 | ||||
| -rwxr-xr-x | t/t2501-cwd-empty.sh | 277 | ||||
| -rw-r--r-- | unpack-trees.c | 30 | ||||
| -rw-r--r-- | unpack-trees.h | 1 |
13 files changed, 442 insertions, 22 deletions
diff --git a/builtin/clean.c b/builtin/clean.c index 98a2860409..3ff02bbbff 100644 --- a/builtin/clean.c +++ b/builtin/clean.c @@ -36,6 +36,8 @@ static const char *msg_skip_git_dir = N_("Skipping repository %s\n"); static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n"); static const char *msg_warn_remove_failed = N_("failed to remove %s"); static const char *msg_warn_lstat_failed = N_("could not lstat %s\n"); +static const char *msg_skip_cwd = N_("Refusing to remove current working directory\n"); +static const char *msg_would_skip_cwd = N_("Would refuse to remove current working directory\n"); enum color_clean { CLEAN_COLOR_RESET = 0, @@ -153,6 +155,8 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag, { DIR *dir; struct strbuf quoted = STRBUF_INIT; + struct strbuf realpath = STRBUF_INIT; + struct strbuf real_ocwd = STRBUF_INIT; struct dirent *e; int res = 0, ret = 0, gone = 1, original_len = path->len, len; struct string_list dels = STRING_LIST_INIT_DUP; @@ -231,16 +235,36 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag, strbuf_setlen(path, original_len); if (*dir_gone) { - res = dry_run ? 0 : rmdir(path->buf); - if (!res) - *dir_gone = 1; - else { - int saved_errno = errno; - quote_path(path->buf, prefix, "ed, 0); - errno = saved_errno; - warning_errno(_(msg_warn_remove_failed), quoted.buf); + /* + * Normalize path components in path->buf, e.g. change '\' to + * '/' on Windows. + */ + strbuf_realpath(&realpath, path->buf, 1); + + /* + * path and realpath are absolute; for comparison, we would + * like to transform startup_info->original_cwd to an absolute + * path too. + */ + if (startup_info->original_cwd) + strbuf_realpath(&real_ocwd, + startup_info->original_cwd, 1); + + if (!strbuf_cmp(&realpath, &real_ocwd)) { + printf("%s", dry_run ? _(msg_would_skip_cwd) : _(msg_skip_cwd)); *dir_gone = 0; - ret = 1; + } else { + res = dry_run ? 0 : rmdir(path->buf); + if (!res) + *dir_gone = 1; + else { + int saved_errno = errno; + quote_path(path->buf, prefix, "ed, 0); + errno = saved_errno; + warning_errno(_(msg_warn_remove_failed), quoted.buf); + *dir_gone = 0; + ret = 1; + } } } @@ -250,6 +274,8 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag, printf(dry_run ? _(msg_would_remove) : _(msg_remove), dels.items[i].string); } out: + strbuf_release(&realpath); + strbuf_release(&real_ocwd); strbuf_release("ed); string_list_clear(&dels, 0); return ret; diff --git a/builtin/rm.c b/builtin/rm.c index 3d0967cdc1..b4132e5d8e 100644 --- a/builtin/rm.c +++ b/builtin/rm.c @@ -399,12 +399,13 @@ int cmd_rm(int argc, const char **argv, const char *prefix) if (!index_only) { int removed = 0, gitmodules_modified = 0; struct strbuf buf = STRBUF_INIT; + int flag = force ? REMOVE_DIR_PURGE_ORIGINAL_CWD : 0; for (i = 0; i < list.nr; i++) { const char *path = list.entry[i].name; if (list.entry[i].is_submodule) { strbuf_reset(&buf); strbuf_addstr(&buf, path); - if (remove_dir_recursively(&buf, 0)) + if (remove_dir_recursively(&buf, flag)) die(_("could not remove '%s'"), path); removed = 1; diff --git a/builtin/stash.c b/builtin/stash.c index 18c812bbe0..fb1e466e5d 100644 --- a/builtin/stash.c +++ b/builtin/stash.c @@ -1538,8 +1538,10 @@ static int do_push_stash(const struct pathspec *ps, const char *stash_msg, int q struct child_process cp = CHILD_PROCESS_INIT; cp.git_cmd = 1; + if (startup_info->original_cwd) + cp.dir = startup_info->original_cwd; strvec_pushl(&cp.args, "clean", "--force", - "--quiet", "-d", NULL); + "--quiet", "-d", ":/", NULL); if (include_untracked == INCLUDE_ALL_FILES) strvec_push(&cp.args, "-x"); if (run_command(&cp)) { @@ -1846,8 +1846,10 @@ void overlay_tree_on_index(struct index_state *istate, struct startup_info { int have_repository; const char *prefix; + const char *original_cwd; }; extern struct startup_info *startup_info; +extern const char *tmp_original_cwd; /* merge.c */ struct commit_list; diff --git a/common-main.c b/common-main.c index eafc70718a..29fb7452f8 100644 --- a/common-main.c +++ b/common-main.c @@ -26,6 +26,7 @@ static void restore_sigpipe_to_default(void) int main(int argc, const char **argv) { int result; + struct strbuf tmp = STRBUF_INIT; trace2_initialize_clock(); @@ -49,6 +50,9 @@ int main(int argc, const char **argv) trace2_cmd_start(argv); trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP); + if (!strbuf_getcwd(&tmp)) + tmp_original_cwd = strbuf_detach(&tmp, NULL); + result = cmd_main(argc, argv); /* @@ -3160,6 +3160,7 @@ static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up) int ret = 0, original_len = path->len, len, kept_down = 0; int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY); int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL); + int purge_original_cwd = (flag & REMOVE_DIR_PURGE_ORIGINAL_CWD); struct object_id submodule_head; if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) && @@ -3215,9 +3216,14 @@ static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up) closedir(dir); strbuf_setlen(path, original_len); - if (!ret && !keep_toplevel && !kept_down) - ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1; - else if (kept_up) + if (!ret && !keep_toplevel && !kept_down) { + if (!purge_original_cwd && + startup_info->original_cwd && + !strcmp(startup_info->original_cwd, path->buf)) + ret = -1; /* Do not remove current working directory */ + else + ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1; + } else if (kept_up) /* * report the uplevel that it is not an error that we * did not rmdir() our directory. @@ -3283,6 +3289,9 @@ int remove_path(const char *name) slash = dirs + (slash - name); do { *slash = '\0'; + if (startup_info->original_cwd && + !strcmp(startup_info->original_cwd, dirs)) + break; } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/'))); free(dirs); } @@ -495,6 +495,9 @@ int get_sparse_checkout_patterns(struct pattern_list *pl); /* Remove the contents of path, but leave path itself. */ #define REMOVE_DIR_KEEP_TOPLEVEL 04 +/* Remove the_original_cwd too */ +#define REMOVE_DIR_PURGE_ORIGINAL_CWD 0x08 + /* * Remove path and its contents, recursively. flags is a combination * of the above REMOVE_DIR_* constants. Return 0 on success. @@ -504,7 +507,11 @@ int get_sparse_checkout_patterns(struct pattern_list *pl); */ int remove_dir_recursively(struct strbuf *path, int flag); -/* tries to remove the path with empty directories along it, ignores ENOENT */ +/* + * Tries to remove the path, along with leading empty directories so long as + * those empty directories are not startup_info->original_cwd. Ignores + * ENOENT. + */ int remove_path(const char *path); int fspathcmp(const char *a, const char *b); diff --git a/sequencer.c b/sequencer.c index e314af4d60..6abd72160c 100644 --- a/sequencer.c +++ b/sequencer.c @@ -4223,6 +4223,8 @@ static int run_git_checkout(struct repository *r, struct replay_opts *opts, cmd.git_cmd = 1; + if (startup_info->original_cwd) + cmd.dir = startup_info->original_cwd; strvec_push(&cmd.args, "checkout"); strvec_push(&cmd.args, commit); strvec_pushf(&cmd.env_array, GIT_REFLOG_ACTION "=%s", action); @@ -12,6 +12,7 @@ static int work_tree_config_is_bogus; static struct startup_info the_startup_info; struct startup_info *startup_info = &the_startup_info; +const char *tmp_original_cwd; /* * The input parameter must contain an absolute path, and it must already be @@ -432,6 +433,69 @@ void setup_work_tree(void) initialized = 1; } +static void setup_original_cwd(void) +{ + struct strbuf tmp = STRBUF_INIT; + const char *worktree = NULL; + int offset = -1; + + if (!tmp_original_cwd) + return; + + /* + * startup_info->original_cwd points to the current working + * directory we inherited from our parent process, which is a + * directory we want to avoid removing. + * + * For convience, we would like to have the path relative to the + * worktree instead of an absolute path. + * + * Yes, startup_info->original_cwd is usually the same as 'prefix', + * but differs in two ways: + * - prefix has a trailing '/' + * - if the user passes '-C' to git, that modifies the prefix but + * not startup_info->original_cwd. + */ + + /* Normalize the directory */ + strbuf_realpath(&tmp, tmp_original_cwd, 1); + free((char*)tmp_original_cwd); + tmp_original_cwd = NULL; + startup_info->original_cwd = strbuf_detach(&tmp, NULL); + + /* + * Get our worktree; we only protect the current working directory + * if it's in the worktree. + */ + worktree = get_git_work_tree(); + if (!worktree) + goto no_prevention_needed; + + offset = dir_inside_of(startup_info->original_cwd, worktree); + if (offset >= 0) { + /* + * If startup_info->original_cwd == worktree, that is already + * protected and we don't need original_cwd as a secondary + * protection measure. + */ + if (!*(startup_info->original_cwd + offset)) + goto no_prevention_needed; + + /* + * original_cwd was inside worktree; precompose it just as + * we do prefix so that built up paths will match + */ + startup_info->original_cwd = \ + precompose_string_if_needed(startup_info->original_cwd + + offset); + return; + } + +no_prevention_needed: + free((char*)startup_info->original_cwd); + startup_info->original_cwd = NULL; +} + static int read_worktree_config(const char *var, const char *value, void *vdata) { struct repository_format *data = vdata; @@ -1330,6 +1394,7 @@ const char *setup_git_directory_gently(int *nongit_ok) setenv(GIT_PREFIX_ENVIRONMENT, "", 1); } + setup_original_cwd(); strbuf_release(&dir); strbuf_release(&gitdir); diff --git a/symlinks.c b/symlinks.c index 5232d02020..c667baa949 100644 --- a/symlinks.c +++ b/symlinks.c @@ -279,7 +279,9 @@ static void do_remove_scheduled_dirs(int new_len) { while (removal.len > new_len) { removal.buf[removal.len] = '\0'; - if (rmdir(removal.buf)) + if ((startup_info->original_cwd && + !strcmp(removal.buf, startup_info->original_cwd)) || + rmdir(removal.buf)) break; do { removal.len--; @@ -293,6 +295,10 @@ void schedule_dir_for_removal(const char *name, int len) { int match_len, last_slash, i, previous_slash; + if (startup_info->original_cwd && + !strcmp(name, startup_info->original_cwd)) + return; /* Do not remove the current working directory */ + match_len = last_slash = i = longest_path_match(name, len, removal.buf, removal.len, &previous_slash); diff --git a/t/t2501-cwd-empty.sh b/t/t2501-cwd-empty.sh new file mode 100755 index 0000000000..f6d8d7d03d --- /dev/null +++ b/t/t2501-cwd-empty.sh @@ -0,0 +1,277 @@ +#!/bin/sh + +test_description='Test handling of the current working directory becoming empty' + +. ./test-lib.sh + +test_expect_success setup ' + test_commit init && + + git branch fd_conflict && + + mkdir -p foo/bar && + test_commit foo/bar/baz && + + git revert HEAD && + git tag reverted && + + git checkout fd_conflict && + mkdir dirORfile && + test_commit dirORfile/foo && + + git rm -r dirORfile && + echo not-a-directory >dirORfile && + git add dirORfile && + git commit -m dirORfile && + + git switch -c df_conflict HEAD~1 && + test_commit random_file && + + git switch -c undo_fd_conflict fd_conflict && + git revert HEAD +' + +test_incidental_dir_removal () { + test_when_finished "git reset --hard" && + + git checkout foo/bar/baz^{commit} && + test_path_is_dir foo/bar && + + ( + cd foo && + "$@" && + + # Make sure foo still exists, and commands needing it work + test-tool getcwd && + git status --porcelain + ) && + test_path_is_missing foo/bar/baz && + test_path_is_missing foo/bar && + + test_path_is_dir foo +} + +test_required_dir_removal () { + git checkout df_conflict^{commit} && + test_when_finished "git clean -fdx" && + + ( + cd dirORfile && + + # Ensure command refuses to run + test_must_fail "$@" 2>../error && + grep "Refusing to remove.*current working directory" ../error && + + # ...and that the index and working tree are left clean + git diff --exit-code HEAD && + + # Ensure that getcwd and git status do not error out (which + # they might if the current working directory had been removed) + test-tool getcwd && + git status --porcelain + ) && + + test_path_is_dir dirORfile +} + +test_expect_success 'checkout does not clean cwd incidentally' ' + test_incidental_dir_removal git checkout init +' + +test_expect_success 'checkout fails if cwd needs to be removed' ' + test_required_dir_removal git checkout fd_conflict +' + +test_expect_success 'reset --hard does not clean cwd incidentally' ' + test_incidental_dir_removal git reset --hard init +' + +test_expect_success 'reset --hard fails if cwd needs to be removed' ' + test_required_dir_removal git reset --hard fd_conflict +' + +test_expect_success 'merge does not clean cwd incidentally' ' + test_incidental_dir_removal git merge reverted +' + +# This file uses some simple merges where +# Base: 'dirORfile/' exists +# Side1: random other file changed +# Side2: 'dirORfile/' removed, 'dirORfile' added +# this should resolve cleanly, but merge-recursive throws merge conflicts +# because it's dumb. Add a special test for checking merge-recursive (and +# merge-ort), then after this just hard require ort for all remaining tests. +# +test_expect_success 'merge fails if cwd needs to be removed; recursive friendly' ' + git checkout foo/bar/baz && + test_when_finished "git clean -fdx" && + + mkdir dirORfile && + ( + cd dirORfile && + + test_must_fail git merge fd_conflict 2>../error + ) && + + test_path_is_dir dirORfile && + grep "Refusing to remove the current working directory" error +' + +GIT_TEST_MERGE_ALGORITHM=ort + +test_expect_success 'merge fails if cwd needs to be removed' ' + test_required_dir_removal git merge fd_conflict +' + +test_expect_success 'cherry-pick does not clean cwd incidentally' ' + test_incidental_dir_removal git cherry-pick reverted +' + +test_expect_success 'cherry-pick fails if cwd needs to be removed' ' + test_required_dir_removal git cherry-pick fd_conflict +' + +test_expect_success 'rebase does not clean cwd incidentally' ' + test_incidental_dir_removal git rebase reverted +' + +test_expect_success 'rebase fails if cwd needs to be removed' ' + test_required_dir_removal git rebase fd_conflict +' + +test_expect_success 'revert does not clean cwd incidentally' ' + test_incidental_dir_removal git revert HEAD +' + +test_expect_success 'revert fails if cwd needs to be removed' ' + test_required_dir_removal git revert undo_fd_conflict +' + +test_expect_success 'rm does not clean cwd incidentally' ' + test_incidental_dir_removal git rm bar/baz.t +' + +test_expect_success 'apply does not remove cwd incidentally' ' + git diff HEAD HEAD~1 >patch && + test_incidental_dir_removal git apply ../patch +' + +test_incidental_untracked_dir_removal () { + test_when_finished "git reset --hard" && + + git checkout foo/bar/baz^{commit} && + mkdir -p untracked && + mkdir empty + >untracked/random && + + ( + cd untracked && + "$@" && + + # Make sure untracked still exists, and commands needing it work + test-tool getcwd && + git status --porcelain + ) && + test_path_is_missing empty && + test_path_is_missing untracked/random && + + test_path_is_dir untracked +} + +test_expect_success 'clean does not remove cwd incidentally' ' + test_incidental_untracked_dir_removal \ + git -C .. clean -fd -e warnings . >warnings && + grep "Refusing to remove current working directory" warnings +' + +test_expect_success 'stash does not remove cwd incidentally' ' + test_incidental_untracked_dir_removal \ + git stash --include-untracked +' + +test_expect_success '`rm -rf dir` only removes a subset of dir' ' + test_when_finished "rm -rf a/" && + + mkdir -p a/b/c && + >a/b/c/untracked && + >a/b/c/tracked && + git add a/b/c/tracked && + + ( + cd a/b && + git rm -rf ../b + ) && + + test_path_is_dir a/b && + test_path_is_missing a/b/c/tracked && + test_path_is_file a/b/c/untracked +' + +test_expect_success '`rm -rf dir` even with only tracked files will remove something else' ' + test_when_finished "rm -rf a/" && + + mkdir -p a/b/c && + >a/b/c/tracked && + git add a/b/c/tracked && + + ( + cd a/b && + git rm -rf ../b + ) && + + test_path_is_missing a/b/c/tracked && + test_path_is_missing a/b/c && + test_path_is_dir a/b +' + +test_expect_success 'git version continues working from a deleted dir' ' + mkdir tmp && + ( + cd tmp && + rm -rf ../tmp && + git version + ) +' + +test_submodule_removal () { + path_status=$1 && + shift && + + test_status= + test "$path_status" = dir && test_status=test_must_fail + + test_when_finished "git reset --hard HEAD~1" && + test_when_finished "rm -rf .git/modules/my_submodule" && + + git checkout foo/bar/baz && + + git init my_submodule && + touch my_submodule/file && + git -C my_submodule add file && + git -C my_submodule commit -m "initial commit" && + git submodule add ./my_submodule && + git commit -m "Add the submodule" && + + ( + cd my_submodule && + $test_status "$@" + ) && + + test_path_is_${path_status} my_submodule +} + +test_expect_success 'rm -r with -C leaves submodule if cwd inside' ' + test_submodule_removal dir git -C .. rm -r my_submodule/ +' + +test_expect_success 'rm -r leaves submodule if cwd inside' ' + test_submodule_removal dir \ + git --git-dir=../.git --work-tree=.. rm -r ../my_submodule/ +' + +test_expect_success 'rm -rf removes submodule even if cwd inside' ' + test_submodule_removal missing \ + git --git-dir=../.git --work-tree=.. rm -rf ../my_submodule/ +' + +test_done diff --git a/unpack-trees.c b/unpack-trees.c index 98e2f2e0e6..360844bda3 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -36,6 +36,9 @@ static const char *unpack_plumbing_errors[NB_UNPACK_TREES_WARNING_TYPES] = { /* ERROR_NOT_UPTODATE_DIR */ "Updating '%s' would lose untracked files in it", + /* ERROR_CWD_IN_THE_WAY */ + "Refusing to remove '%s' since it is the current working directory.", + /* ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN */ "Untracked working tree file '%s' would be overwritten by merge.", @@ -131,6 +134,9 @@ void setup_unpack_trees_porcelain(struct unpack_trees_options *opts, msgs[ERROR_NOT_UPTODATE_DIR] = _("Updating the following directories would lose untracked files in them:\n%s"); + msgs[ERROR_CWD_IN_THE_WAY] = + _("Refusing to remove the current working directory:\n%s"); + if (!strcmp(cmd, "checkout")) msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE) ? _("The following untracked working tree files would be removed by checkout:\n%%s" @@ -2159,10 +2165,7 @@ static int verify_clean_subdirectory(const struct cache_entry *ce, cnt++; } - /* - * Then we need to make sure that we do not lose a locally - * present file that is not ignored. - */ + /* Do not lose a locally present file that is not ignored. */ pathbuf = xstrfmt("%.*s/", namelen, ce->name); memset(&d, 0, sizeof(d)); @@ -2173,6 +2176,12 @@ static int verify_clean_subdirectory(const struct cache_entry *ce, free(pathbuf); if (i) return add_rejected_path(o, ERROR_NOT_UPTODATE_DIR, ce->name); + + /* Do not lose startup_info->original_cwd */ + if (startup_info->original_cwd && + !strcmp(startup_info->original_cwd, ce->name)) + return add_rejected_path(o, ERROR_CWD_IN_THE_WAY, ce->name); + return cnt; } @@ -2265,9 +2274,18 @@ static int verify_absent_1(const struct cache_entry *ce, int len; struct stat st; - if (o->index_only || !o->update || - o->reset == UNPACK_RESET_OVERWRITE_UNTRACKED) + if (o->index_only || !o->update) + return 0; + + if (o->reset == UNPACK_RESET_OVERWRITE_UNTRACKED) { + /* Avoid nuking startup_info->original_cwd... */ + if (startup_info->original_cwd && + !strcmp(startup_info->original_cwd, ce->name)) + return add_rejected_path(o, ERROR_CWD_IN_THE_WAY, + ce->name); + /* ...but nuke anything else. */ return 0; + } len = check_leading_path(ce->name, ce_namelen(ce), 0); if (!len) diff --git a/unpack-trees.h b/unpack-trees.h index 71ffb7eeb0..efb9edfbb2 100644 --- a/unpack-trees.h +++ b/unpack-trees.h @@ -19,6 +19,7 @@ enum unpack_trees_error_types { ERROR_WOULD_OVERWRITE = 0, ERROR_NOT_UPTODATE_FILE, ERROR_NOT_UPTODATE_DIR, + ERROR_CWD_IN_THE_WAY, ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, ERROR_BIND_OVERLAP, |