From af5bacf471825662f8eeda932cfabd6c47634434 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Thu, 19 Jan 2017 22:19:58 +0100 Subject: remote rename: demonstrate a bogus "remote exists" bug Some users like to set `remote.origin.prune = true` in their ~/.gitconfig so that all of their repositories use that default. However, our code is ill-prepared for this, mistaking that single entry to mean that there is already a remote of the name "origin", even if there is not. This patch adds a test case demonstrating this issue. Reported by Andrew Arnott. Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh index 8198d8e..2c03f44 100755 --- a/t/t5505-remote.sh +++ b/t/t5505-remote.sh @@ -764,6 +764,13 @@ test_expect_success 'rename a remote with name prefix of other remote' ' ) ' +test_expect_failure 'rename succeeds with existing remote..prune' ' + git clone one four.four && + test_when_finished git config --global --unset remote.upstream.prune && + git config --global remote.upstream.prune true && + git -C four.four remote rename origin upstream +' + cat >remotes_origin < Date: Thu, 19 Jan 2017 22:20:02 +0100 Subject: remote rename: more carefully determine whether a remote is configured One of the really nice features of the ~/.gitconfig file is that users can override defaults by their own preferred settings for all of their repositories. One such default that some users like to override is whether the "origin" remote gets auto-pruned or not. The user would simply call git config --global remote.origin.prune true and from now on all "origin" remotes would be pruned automatically when fetching into the local repository. There is just one catch: now Git thinks that the "origin" remote is configured, even if the repository config has no [remote "origin"] section at all, as it does not realize that the "prune" setting was configured globally and that there really is no "origin" remote configured in this repository. That is a problem e.g. when renaming a remote to a new name, when Git may be fooled into thinking that there is already a remote of that new name. Let's fix this by paying more attention to *where* the remote settings came from: if they are configured in the local repository config, we must not overwrite them. If they were configured elsewhere, we cannot overwrite them to begin with, as we only write the repository config. There is only one caller of remote_is_configured() (in `git fetch`) that may want to take remotes into account even if they were configured outside the repository config; all other callers essentially try to prevent the Git command from overwriting settings in the repository config. To accommodate that fact, the remote_is_configured() function now requires a parameter that states whether the caller is interested in all remotes, or only in those that were configured in the repository config. Many thanks to Jeff King whose tireless review helped with settling for nothing less than the current strategy. This fixes https://github.com/git-for-windows/git/issues/888 Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano diff --git a/builtin/fetch.c b/builtin/fetch.c index cd7e3ce..44de685 100644 --- a/builtin/fetch.c +++ b/builtin/fetch.c @@ -1145,7 +1145,7 @@ static int add_remote_or_group(const char *name, struct string_list *list) git_config(get_remote_group, &g); if (list->nr == prev_nr) { struct remote *remote = remote_get(name); - if (!remote_is_configured(remote)) + if (!remote_is_configured(remote, 0)) return 0; string_list_append(list, remote->name); } diff --git a/builtin/remote.c b/builtin/remote.c index 9f6a6b3..be1b626 100644 --- a/builtin/remote.c +++ b/builtin/remote.c @@ -186,7 +186,7 @@ static int add(int argc, const char **argv) url = argv[1]; remote = remote_get(name); - if (remote_is_configured(remote)) + if (remote_is_configured(remote, 1)) die(_("remote %s already exists."), name); strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name); @@ -618,14 +618,14 @@ static int mv(int argc, const char **argv) rename.remote_branches = &remote_branches; oldremote = remote_get(rename.old); - if (!remote_is_configured(oldremote)) + if (!remote_is_configured(oldremote, 1)) die(_("No such remote: %s"), rename.old); if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG) return migrate_file(oldremote); newremote = remote_get(rename.new); - if (remote_is_configured(newremote)) + if (remote_is_configured(newremote, 1)) die(_("remote %s already exists."), rename.new); strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new); @@ -753,7 +753,7 @@ static int rm(int argc, const char **argv) usage_with_options(builtin_remote_rm_usage, options); remote = remote_get(argv[1]); - if (!remote_is_configured(remote)) + if (!remote_is_configured(remote, 1)) die(_("No such remote: %s"), argv[1]); known_remotes.to_delete = remote; @@ -1416,7 +1416,7 @@ static int set_remote_branches(const char *remotename, const char **branches, strbuf_addf(&key, "remote.%s.fetch", remotename); remote = remote_get(remotename); - if (!remote_is_configured(remote)) + if (!remote_is_configured(remote, 1)) die(_("No such remote '%s'"), remotename); if (!add_mode && remove_all_fetch_refspecs(remotename, key.buf)) { @@ -1470,7 +1470,7 @@ static int get_url(int argc, const char **argv) remotename = argv[0]; remote = remote_get(remotename); - if (!remote_is_configured(remote)) + if (!remote_is_configured(remote, 1)) die(_("No such remote '%s'"), remotename); url_nr = 0; @@ -1538,7 +1538,7 @@ static int set_url(int argc, const char **argv) oldurl = newurl; remote = remote_get(remotename); - if (!remote_is_configured(remote)) + if (!remote_is_configured(remote, 1)) die(_("No such remote '%s'"), remotename); if (push_mode) { diff --git a/remote.c b/remote.c index ad6c542..8524135 100644 --- a/remote.c +++ b/remote.c @@ -255,6 +255,7 @@ static void read_remotes_file(struct remote *remote) if (!f) return; + remote->configured_in_repo = 1; remote->origin = REMOTE_REMOTES; while (strbuf_getline(&buf, f) != EOF) { const char *v; @@ -289,6 +290,7 @@ static void read_branches_file(struct remote *remote) return; } + remote->configured_in_repo = 1; remote->origin = REMOTE_BRANCHES; /* @@ -371,6 +373,8 @@ static int handle_config(const char *key, const char *value, void *cb) } remote = make_remote(name, namelen); remote->origin = REMOTE_CONFIG; + if (current_config_scope() == CONFIG_SCOPE_REPO) + remote->configured_in_repo = 1; if (!strcmp(subkey, "mirror")) remote->mirror = git_config_bool(key, value); else if (!strcmp(subkey, "skipdefaultupdate")) @@ -714,9 +718,13 @@ struct remote *pushremote_get(const char *name) return remote_get_1(name, pushremote_for_branch); } -int remote_is_configured(struct remote *remote) +int remote_is_configured(struct remote *remote, int in_repo) { - return remote && remote->origin; + if (!remote) + return 0; + if (in_repo) + return remote->configured_in_repo; + return !!remote->origin; } int for_each_remote(each_remote_fn fn, void *priv) diff --git a/remote.h b/remote.h index 9248811..a5bbbe0 100644 --- a/remote.h +++ b/remote.h @@ -15,7 +15,7 @@ struct remote { struct hashmap_entry ent; /* must be first */ const char *name; - int origin; + int origin, configured_in_repo; const char *foreign_vcs; @@ -60,7 +60,7 @@ struct remote { struct remote *remote_get(const char *name); struct remote *pushremote_get(const char *name); -int remote_is_configured(struct remote *remote); +int remote_is_configured(struct remote *remote, int in_repo); typedef int each_remote_fn(struct remote *remote, void *priv); int for_each_remote(each_remote_fn fn, void *priv); diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh index 2c03f44..ba46e86 100755 --- a/t/t5505-remote.sh +++ b/t/t5505-remote.sh @@ -764,7 +764,7 @@ test_expect_success 'rename a remote with name prefix of other remote' ' ) ' -test_expect_failure 'rename succeeds with existing remote..prune' ' +test_expect_success 'rename succeeds with existing remote..prune' ' git clone one four.four && test_when_finished git config --global --unset remote.upstream.prune && git config --global remote.upstream.prune true && -- cgit v0.10.2-6-g49f6