submodule--helper: do not borrow absolute_path() result for too long

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 57545543ebcc46ef28ca4a22d399b5476de7af0b..7ea533e4ab6a244297068fe8a376c094e7d42291 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -18,11 +18,12 @@
 #include "xdiff-interface.h"
 #include "ll-merge.h"
 #include "resolve-undo.h"
+#include "submodule-config.h"
 #include "submodule.h"
 
 static const char * const checkout_usage[] = {
-       N_("git checkout [options] <branch>"),
-       N_("git checkout [options] [<branch>] -- <file>..."),
+       N_("git checkout [<options>] <branch>"),
+       N_("git checkout [<options>] [<branch>] -- <file>..."),
        NULL,
 };
 
@@ -64,23 +65,41 @@ static int post_checkout_hook(struct commit *old, struct commit *new,
 
 }
 
-static int update_some(const unsigned char *sha1, const char *base, int baselen,
+static int update_some(const unsigned char *sha1, struct strbuf *base,
                const char *pathname, unsigned mode, int stage, void *context)
 {
        int len;
        struct cache_entry *ce;
+       int pos;
 
        if (S_ISDIR(mode))
                return READ_TREE_RECURSIVE;
 
-       len = baselen + strlen(pathname);
+       len = base->len + strlen(pathname);
        ce = xcalloc(1, cache_entry_size(len));
        hashcpy(ce->sha1, sha1);
-       memcpy(ce->name, base, baselen);
-       memcpy(ce->name + baselen, pathname, len - baselen);
+       memcpy(ce->name, base->buf, base->len);
+       memcpy(ce->name + base->len, pathname, len - base->len);
        ce->ce_flags = create_ce_flags(0) | CE_UPDATE;
        ce->ce_namelen = len;
        ce->ce_mode = create_ce_mode(mode);
+
+       /*
+        * If the entry is the same as the current index, we can leave the old
+        * entry in place. Whether it is UPTODATE or not, checkout_entry will
+        * do the right thing.
+        */
+       pos = cache_name_pos(ce->name, ce->ce_namelen);
+       if (pos >= 0) {
+               struct cache_entry *old = active_cache[pos];
+               if (ce->ce_mode == old->ce_mode &&
+                   !hashcmp(ce->sha1, old->sha1)) {
+                       old->ce_flags |= CE_UPDATE;
+                       free(ce);
+                       return 0;
+               }
+       }
+
        add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
        return 0;
 }
@@ -594,22 +613,20 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
        if (opts->new_branch) {
                if (opts->new_orphan_branch) {
                        if (opts->new_branch_log && !log_all_ref_updates) {
-                               int temp;
-                               struct strbuf log_file = STRBUF_INIT;
                                int ret;
-                               const char *ref_name;
-
-                               ref_name = mkpath("refs/heads/%s", opts->new_orphan_branch);
-                               temp = log_all_ref_updates;
-                               log_all_ref_updates = 1;
-                               ret = log_ref_setup(ref_name, &log_file);
-                               log_all_ref_updates = temp;
-                               strbuf_release(&log_file);
+                               char *refname;
+                               struct strbuf err = STRBUF_INIT;
+
+                               refname = mkpathdup("refs/heads/%s", opts->new_orphan_branch);
+                               ret = safe_create_reflog(refname, 1, &err);
+                               free(refname);
                                if (ret) {
-                                       fprintf(stderr, _("Can not do reflog for '%s'\n"),
-                                           opts->new_orphan_branch);
+                                       fprintf(stderr, _("Can not do reflog for '%s': %s\n"),
+                                               opts->new_orphan_branch, err.buf);
+                                       strbuf_release(&err);
                                        return;
                                }
+                               strbuf_release(&err);
                        }
                }
                else
@@ -677,10 +694,10 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 }
 
 static int add_pending_uninteresting_ref(const char *refname,
-                                        const unsigned char *sha1,
+                                        const struct object_id *oid,
                                         int flags, void *cb_data)
 {
-       add_pending_sha1(cb_data, refname, sha1, UNINTERESTING);
+       add_pending_sha1(cb_data, refname, oid->hash, UNINTERESTING);
        return 0;
 }
 
@@ -735,10 +752,17 @@ static void suggest_reattach(struct commit *commit, struct rev_info *revs)
 
        if (advice_detached_head)
                fprintf(stderr,
-                       _(
+                       Q_(
+                       /* The singular version */
+                       "If you want to keep it by creating a new branch, "
+                       "this may be a good time\nto do so with:\n\n"
+                       " git branch <new-branch-name> %s\n\n",
+                       /* The plural version */
                        "If you want to keep them by creating a new branch, "
                        "this may be a good time\nto do so with:\n\n"
-                       " git branch new_branch_name %s\n\n"),
+                       " git branch <new-branch-name> %s\n\n",
+                       /* Give ngettext() the count */
+                       lost),
                        find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
 }
 
@@ -1197,7 +1221,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
                OPT_BOOL(0, "ignore-skip-worktree-bits", &opts.ignore_skipworktree,
                         N_("do not limit pathspecs to sparse entries only")),
                OPT_HIDDEN_BOOL(0, "guess", &dwim_new_local_branch,
-                               N_("second guess 'git checkout no-such-branch'")),
+                               N_("second guess 'git checkout <no-such-branch>'")),
                OPT_BOOL(0, "ignore-other-worktrees", &opts.ignore_other_worktrees,
                         N_("do not check if another worktree is holding the given ref")),
                OPT_END(),