From b4372ef136b0a5a2c1dbd88a11dd72b478d0e0a5 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Fri, 6 Jul 2007 13:05:59 +0100 Subject: [PATCH] Enable "git rerere" by the config variable rerere.enabled Earlier, "git rerere" was enabled by creating the directory .git/rr-cache. That is definitely not in line with most other features, which are enabled by a config variable. So, check the config variable "rerere.enabled". If it is set to "false" explicitely, do not activate rerere, even if .git/rr-cache exists. This should help when you want to disable rerere temporarily. If "rerere.enabled" is not set at all, fall back to detection of the directory .git/rr-cache. [jc: with minimum tweaks] Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano --- Documentation/config.txt | 5 +++++ Documentation/git-rerere.txt | 4 ++-- builtin-rerere.c | 32 ++++++++++++++++++++++++++++---- contrib/emacs/git.el | 3 +-- git-am.sh | 15 +++------------ git-commit.sh | 5 +---- git-merge.sh | 5 +---- git-rebase.sh | 12 +++--------- t/t4200-rerere.sh | 23 ++++++++++++++++++++--- 9 files changed, 64 insertions(+), 40 deletions(-) diff --git a/Documentation/config.txt b/Documentation/config.txt index 66a55b051..4b67f0adf 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -448,6 +448,11 @@ gc.rerereunresolved:: kept for this many days when `git rerere gc` is run. The default is 15 days. See gitlink:git-rerere[1]. +rerere.enabled:: + Activate recording of resolved conflicts, so that identical + conflict hunks can be resolved automatically, should they + be encountered again. See gitlink:git-rerere[1]. + gitcvs.enabled:: Whether the cvs server interface is enabled for this repository. See gitlink:git-cvsserver[1]. diff --git a/Documentation/git-rerere.txt b/Documentation/git-rerere.txt index 7ff9b05e6..c4d426323 100644 --- a/Documentation/git-rerere.txt +++ b/Documentation/git-rerere.txt @@ -23,7 +23,7 @@ initial manual merge, and later by noticing the same automerge results and applying the previously recorded hand resolution. [NOTE] -You need to create `$GIT_DIR/rr-cache` directory to enable this +You need to set the config variable rerere.enabled to enable this command. @@ -171,7 +171,7 @@ records it if it is a new conflict, or reuses the earlier hand resolve when it is not. `git-commit` also invokes `git-rerere` when recording a merge result. What this means is that you do not have to do anything special yourself (Note: you still have -to create `$GIT_DIR/rr-cache` directory to enable this command). +to set the config variable rerere.enabled to enable this command). In our example, when you did the test merge, the manual resolution is recorded, and it will be reused when you do the diff --git a/builtin-rerere.c b/builtin-rerere.c index 29fb075d2..3196151cc 100644 --- a/builtin-rerere.c +++ b/builtin-rerere.c @@ -12,6 +12,9 @@ static const char git_rerere_usage[] = static int cutoff_noresolve = 15; static int cutoff_resolve = 60; +/* if rerere_enabled == -1, fall back to detection of .git/rr-cache */ +static int rerere_enabled = -1; + static char *merge_rr_path; static const char *rr_path(const char *name, const char *file) @@ -387,21 +390,41 @@ static int git_rerere_config(const char *var, const char *value) cutoff_resolve = git_config_int(var, value); else if (!strcmp(var, "gc.rerereunresolved")) cutoff_noresolve = git_config_int(var, value); + else if (!strcmp(var, "rerere.enabled")) + rerere_enabled = git_config_bool(var, value); else return git_default_config(var, value); return 0; } -int cmd_rerere(int argc, const char **argv, const char *prefix) +static int is_rerere_enabled(void) { - struct path_list merge_rr = { NULL, 0, 0, 1 }; - int i, fd = -1; struct stat st; + const char *rr_cache; + int rr_cache_exists; - if (stat(git_path("rr-cache"), &st) || !S_ISDIR(st.st_mode)) + if (!rerere_enabled) return 0; + rr_cache = git_path("rr-cache"); + rr_cache_exists = !stat(rr_cache, &st) && S_ISDIR(st.st_mode); + if (rerere_enabled < 0) + return rr_cache_exists; + + if (!rr_cache_exists && + (mkdir(rr_cache, 0777) || adjust_shared_perm(rr_cache))) + die("Could not create directory %s", rr_cache); + return 1; +} + +int cmd_rerere(int argc, const char **argv, const char *prefix) +{ + struct path_list merge_rr = { NULL, 0, 0, 1 }; + int i, fd = -1; + git_config(git_rerere_config); + if (!is_rerere_enabled()) + return 0; merge_rr_path = xstrdup(git_path("rr-cache/MERGE_RR")); fd = hold_lock_file_for_update(&write_lock, merge_rr_path, 1); @@ -411,6 +434,7 @@ int cmd_rerere(int argc, const char **argv, const char *prefix) return do_plain_rerere(&merge_rr, fd); else if (!strcmp(argv[1], "clear")) { for (i = 0; i < merge_rr.nr; i++) { + struct stat st; const char *name = (const char *)merge_rr.items[i].util; if (!stat(git_path("rr-cache/%s", name), &st) && S_ISDIR(st.st_mode) && diff --git a/contrib/emacs/git.el b/contrib/emacs/git.el index f60017948..457f95fc0 100644 --- a/contrib/emacs/git.el +++ b/contrib/emacs/git.el @@ -681,8 +681,7 @@ and returns the process output as a string." (condition-case nil (delete-file ".git/MERGE_MSG") (error nil)) (with-current-buffer buffer (erase-buffer)) (git-set-files-state files 'uptodate) - (when (file-directory-p ".git/rr-cache") - (git-run-command nil nil "rerere")) + (git-run-command nil nil "rerere") (git-refresh-files) (git-refresh-ewoc-hf git-status) (message "Committed %s." commit) diff --git a/git-am.sh b/git-am.sh index d57a3e2d0..e5e6f2c91 100755 --- a/git-am.sh +++ b/git-am.sh @@ -95,10 +95,7 @@ It does not apply to blobs recorded in its index." eval GITHEAD_$his_tree='"$SUBJECT"' export GITHEAD_$his_tree git-merge-recursive $orig_tree -- HEAD $his_tree || { - if test -d "$GIT_DIR/rr-cache" - then - git rerere - fi + git rerere echo Failed to merge in the changes. exit 1 } @@ -252,10 +249,7 @@ last=`cat "$dotest/last"` this=`cat "$dotest/next"` if test "$skip" = t then - if test -d "$GIT_DIR/rr-cache" - then - git rerere clear - fi + git rerere clear this=`expr "$this" + 1` resume= fi @@ -420,10 +414,7 @@ do stop_here_user_resolve $this fi apply_status=0 - if test -d "$GIT_DIR/rr-cache" - then - git rerere - fi + git rerere ;; esac diff --git a/git-commit.sh b/git-commit.sh index f866f957c..9106a743c 100755 --- a/git-commit.sh +++ b/git-commit.sh @@ -610,10 +610,7 @@ rm -f "$GIT_DIR/COMMIT_MSG" "$GIT_DIR/COMMIT_EDITMSG" "$GIT_DIR/SQUASH_MSG" cd_to_toplevel -if test -d "$GIT_DIR/rr-cache" -then - git rerere -fi +git rerere if test "$ret" = 0 then diff --git a/git-merge.sh b/git-merge.sh index 485253032..5ccf28251 100755 --- a/git-merge.sh +++ b/git-merge.sh @@ -496,9 +496,6 @@ Conflicts: sed -e 's/^[^ ]* / /' | uniq } >>"$GIT_DIR/MERGE_MSG" - if test -d "$GIT_DIR/rr-cache" - then - git rerere - fi + git rerere die "Automatic merge failed; fix conflicts and then commit the result." fi diff --git a/git-rebase.sh b/git-rebase.sh index 7a02f2975..cbafa14ed 100755 --- a/git-rebase.sh +++ b/git-rebase.sh @@ -101,7 +101,7 @@ call_merge () { return ;; 1) - test -d "$GIT_DIR/rr-cache" && git rerere + git rerere die "$RESOLVEMSG" ;; 2) @@ -160,10 +160,7 @@ do --skip) if test -d "$dotest" then - if test -d "$GIT_DIR/rr-cache" - then - git rerere clear - fi + git rerere clear prev_head="`cat $dotest/prev_head`" end="`cat $dotest/end`" msgnum="`cat $dotest/msgnum`" @@ -181,10 +178,7 @@ do exit ;; --abort) - if test -d "$GIT_DIR/rr-cache" - then - git rerere clear - fi + git rerere clear if test -d "$dotest" then rm -r "$dotest" diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh index 71d364ab7..6f55ba03b 100755 --- a/t/t4200-rerere.sh +++ b/t/t4200-rerere.sh @@ -39,15 +39,32 @@ sed -e 's/To die, t/To die! T/' > a1 echo "* END *" >>a1 git commit -q -a -m second -# activate rerere -mkdir .git/rr-cache +test_expect_success 'nothing recorded without rerere' ' + (rm -rf .git/rr-cache; git config rerere.enabled false) && + ! git merge first && + ! test -d .git/rr-cache +' -test_expect_failure 'conflicting merge' 'git pull . first' +# activate rerere, old style +test_expect_success 'conflicting merge' ' + git reset --hard && + mkdir .git/rr-cache && + git config --unset rerere.enabled && + ! git merge first +' sha1=$(sed -e 's/ .*//' .git/rr-cache/MERGE_RR) rr=.git/rr-cache/$sha1 test_expect_success 'recorded preimage' "grep ======= $rr/preimage" +test_expect_success 'rerere.enabled works, too' ' + rm -rf .git/rr-cache && + git config rerere.enabled true && + git reset --hard && + ! git merge first && + grep ======= $rr/preimage +' + test_expect_success 'no postimage or thisimage yet' \ "test ! -f $rr/postimage -a ! -f $rr/thisimage" -- 2.26.2