diff options
Diffstat (limited to 'setup.c')
| -rw-r--r-- | setup.c | 65 |
1 files changed, 65 insertions, 0 deletions
@@ -13,6 +13,7 @@ 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 @@ -433,6 +434,69 @@ 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; @@ -1391,6 +1455,7 @@ const char *setup_git_directory_gently(int *nongit_ok) setenv(GIT_PREFIX_ENVIRONMENT, "", 1); } + setup_original_cwd(); strbuf_release(&dir); strbuf_release(&gitdir); |