зеркало из https://github.com/microsoft/git.git
setup: convert setup_git_directory_gently_1 et al. to strbuf
Convert setup_git_directory_gently_1() and its helper functions setup_explicit_git_dir(), setup_discovered_git_dir() and setup_bare_git_dir() to use a struct strbuf to hold the current working directory. Replacing the PATH_MAX-sized buffer used before removes a path length limition on some file systems. The functions are converted all in one go because they all read and write the variable cwd. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe
Junio C Hamano
Родитель
d13a0a97e0
Коммит
7333ed1788
87
setup.c
87
setup.c
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@ -387,7 +387,7 @@ const char *read_gitfile(const char *path)
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}
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static const char *setup_explicit_git_dir(const char *gitdirenv,
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char *cwd, int len,
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struct strbuf *cwd,
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int *nongit_ok)
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{
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const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
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@ -441,7 +441,7 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
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die_errno("Could not chdir to '%s'", git_work_tree_cfg);
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if (!getcwd(core_worktree, PATH_MAX))
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die_errno("Could not get directory '%s'", git_work_tree_cfg);
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if (chdir(cwd))
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if (chdir(cwd->buf))
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die_errno("Could not come back to cwd");
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set_git_work_tree(core_worktree);
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}
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@ -459,21 +459,20 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
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worktree = get_git_work_tree();
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/* both get_git_work_tree() and cwd are already normalized */
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if (!strcmp(cwd, worktree)) { /* cwd == worktree */
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if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
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set_git_dir(gitdirenv);
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free(gitfile);
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return NULL;
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}
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offset = dir_inside_of(cwd, worktree);
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offset = dir_inside_of(cwd->buf, worktree);
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if (offset >= 0) { /* cwd inside worktree? */
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set_git_dir(real_path(gitdirenv));
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if (chdir(worktree))
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die_errno("Could not chdir to '%s'", worktree);
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cwd[len++] = '/';
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cwd[len] = '\0';
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strbuf_addch(cwd, '/');
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free(gitfile);
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return cwd + offset;
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return cwd->buf + offset;
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}
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/* cwd outside worktree */
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@ -483,7 +482,7 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
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}
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static const char *setup_discovered_git_dir(const char *gitdir,
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char *cwd, int offset, int len,
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struct strbuf *cwd, int offset,
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int *nongit_ok)
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{
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if (check_repository_format_gently(gitdir, nongit_ok))
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@ -491,17 +490,17 @@ static const char *setup_discovered_git_dir(const char *gitdir,
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/* --work-tree is set without --git-dir; use discovered one */
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if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
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if (offset != len && !is_absolute_path(gitdir))
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if (offset != cwd->len && !is_absolute_path(gitdir))
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gitdir = xstrdup(real_path(gitdir));
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if (chdir(cwd))
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if (chdir(cwd->buf))
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die_errno("Could not come back to cwd");
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return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
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return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
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}
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/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
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if (is_bare_repository_cfg > 0) {
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set_git_dir(offset == len ? gitdir : real_path(gitdir));
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if (chdir(cwd))
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set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
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if (chdir(cwd->buf))
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die_errno("Could not come back to cwd");
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return NULL;
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}
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@ -512,18 +511,18 @@ static const char *setup_discovered_git_dir(const char *gitdir,
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set_git_dir(gitdir);
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inside_git_dir = 0;
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inside_work_tree = 1;
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if (offset == len)
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if (offset == cwd->len)
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return NULL;
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/* Make "offset" point to past the '/', and add a '/' at the end */
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offset++;
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cwd[len++] = '/';
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cwd[len] = 0;
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return cwd + offset;
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strbuf_addch(cwd, '/');
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return cwd->buf + offset;
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}
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/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
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static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
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static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
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int *nongit_ok)
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{
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int root_len;
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@ -536,20 +535,20 @@ static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongi
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if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
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const char *gitdir;
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gitdir = offset == len ? "." : xmemdupz(cwd, offset);
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if (chdir(cwd))
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gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
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if (chdir(cwd->buf))
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die_errno("Could not come back to cwd");
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return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
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return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
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}
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inside_git_dir = 1;
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inside_work_tree = 0;
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if (offset != len) {
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if (chdir(cwd))
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if (offset != cwd->len) {
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if (chdir(cwd->buf))
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die_errno("Cannot come back to cwd");
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root_len = offset_1st_component(cwd);
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cwd[offset > root_len ? offset : root_len] = '\0';
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set_git_dir(cwd);
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root_len = offset_1st_component(cwd->buf);
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strbuf_setlen(cwd, offset > root_len ? offset : root_len);
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set_git_dir(cwd->buf);
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}
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else
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set_git_dir(".");
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@ -617,10 +616,10 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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{
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const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
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struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
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static char cwd[PATH_MAX + 1];
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static struct strbuf cwd = STRBUF_INIT;
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const char *gitdirenv, *ret;
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char *gitfile;
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int len, offset, offset_parent, ceil_offset = -1;
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int offset, offset_parent, ceil_offset = -1;
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dev_t current_device = 0;
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int one_filesystem = 1;
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@ -632,9 +631,9 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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if (nongit_ok)
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*nongit_ok = 0;
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if (!getcwd(cwd, sizeof(cwd) - 1))
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if (strbuf_getcwd(&cwd))
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die_errno("Unable to read current working directory");
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offset = len = strlen(cwd);
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offset = cwd.len;
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/*
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* If GIT_DIR is set explicitly, we're not going
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@ -643,7 +642,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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*/
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gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
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if (gitdirenv)
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return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
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return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok);
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if (env_ceiling_dirs) {
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int empty_entry_found = 0;
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@ -651,11 +650,11 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
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filter_string_list(&ceiling_dirs, 0,
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canonicalize_ceiling_entry, &empty_entry_found);
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ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
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ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs);
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string_list_clear(&ceiling_dirs, 0);
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}
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if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
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if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
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ceil_offset = 1;
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/*
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@ -683,7 +682,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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if (gitdirenv) {
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ret = setup_discovered_git_dir(gitdirenv,
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cwd, offset, len,
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&cwd, offset,
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nongit_ok);
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free(gitfile);
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return ret;
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@ -691,29 +690,31 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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free(gitfile);
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if (is_git_directory("."))
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return setup_bare_git_dir(cwd, offset, len, nongit_ok);
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return setup_bare_git_dir(&cwd, offset, nongit_ok);
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offset_parent = offset;
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while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
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while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
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if (offset_parent <= ceil_offset)
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return setup_nongit(cwd, nongit_ok);
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return setup_nongit(cwd.buf, nongit_ok);
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if (one_filesystem) {
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dev_t parent_device = get_device_or_die("..", cwd, offset);
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dev_t parent_device = get_device_or_die("..", cwd.buf,
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offset);
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if (parent_device != current_device) {
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if (nongit_ok) {
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if (chdir(cwd))
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if (chdir(cwd.buf))
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die_errno("Cannot come back to cwd");
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*nongit_ok = 1;
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return NULL;
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}
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cwd[offset] = '\0';
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strbuf_setlen(&cwd, offset);
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die("Not a git repository (or any parent up to mount point %s)\n"
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"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
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"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).",
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cwd.buf);
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}
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}
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if (chdir("..")) {
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cwd[offset] = '\0';
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die_errno("Cannot change to '%s/..'", cwd);
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strbuf_setlen(&cwd, offset);
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die_errno("Cannot change to '%s/..'", cwd.buf);
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}
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offset = offset_parent;
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}
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