git: add --no-replace-objects option to disable replacing

Commit dae556b (environment: add global variable to disable replacement)
adds a variable to enable/disable replacement, and it is enabled by
default for most commands.

So there is no way to disable it for some commands, which is annoying
when we want to get information about a commit that has been replaced.

For example:

$ git cat-file -p N

would output information about the replacement commit if commit N is
replaced.

With the "--no-replace-objects" option that this patch adds it is
possible to get information about the original commit using:

$ git --no-replace-objects cat-file -p N

While at it, let's add some documentation about this new option in the
"git replace" man page too.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-replace.txt b/Documentation/git-replace.txt
index 915cb77b29f9d0fa71a288cace435e73637e1283..8adc1ef55c620d04fc10b8d6ccb0b9c90765a753 100644 (file)
--- a/Documentation/git-replace.txt
+++ b/Documentation/git-replace.txt
@@ -23,6 +23,26 @@ replacement object.
 Unless `-f` is given, the replace reference must not yet exist in
 `.git/refs/replace/` directory.
 
+Replace references will be used by default by all git commands except
+those doing reachability traversal (prune, pack transfer and fsck).
+
+It is possible to disable use of replacement refs for any command
+using the --no-replace-objects option just after "git".
+
+For example if commit "foo" has been replaced by commit "bar":
+
+------------------------------------------------
+$ git --no-replace-object cat-file commit foo
+------------------------------------------------
+
+show information about commit "foo", while:
+
+------------------------------------------------
+$ git cat-file commit foo
+------------------------------------------------
+
+show information about commit "bar".
+
 OPTIONS
 -------
 -f::
@@ -54,6 +74,7 @@ SEE ALSO
 --------
 linkgit:git-tag[1]
 linkgit:git-branch[1]
+linkgit:git[1]
 
 Author
 ------

diff --git a/Documentation/git.txt b/Documentation/git.txt
index d97aaf5bf8a2973f68e8bad308ae7a7fba1bf36b..2f4541780a0f2868a2a890db22d0ccf15e9b5c07 100644 (file)
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -10,7 +10,7 @@ SYNOPSIS
 --------
 [verse]
 'git' [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]
-    [-p|--paginate|--no-pager]
+    [-p|--paginate|--no-pager] [--no-replace-objects]
     [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]
     [--help] COMMAND [ARGS]
 
@@ -237,6 +237,10 @@ help ...`.
        environment is not set, it is set to the current working
        directory.
 
+--no-replace-objects::
+       Do not use replacement refs to replace git objects. See
+       linkgit:git-replace[1] for more information.
+
 
 FURTHER DOCUMENTATION
 ---------------------

diff --git a/git.c b/git.c
index 9883009b5d9f29d4f53187947a6d8664da4d80f4..bd2c5fe77b41f314af21df703364361b1601f3d1 100644 (file)
--- a/git.c
+++ b/git.c
@@ -6,7 +6,7 @@
 
 const char git_usage_string[] =
        "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
-       "           [-p|--paginate|--no-pager]\n"
+       "           [-p|--paginate|--no-pager] [--no-replace-objects]\n"
        "           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
        "           [--help] COMMAND [ARGS]";
 
@@ -87,6 +87,8 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                        use_pager = 0;
                        if (envchanged)
                                *envchanged = 1;
+               } else if (!strcmp(cmd, "--no-replace-objects")) {
+                       read_replace_refs = 0;
                } else if (!strcmp(cmd, "--git-dir")) {
                        if (*argc < 2) {
                                fprintf(stderr, "No directory given for --git-dir.\n" );

diff --git a/t/t6050-replace.sh b/t/t6050-replace.sh
index 8b8bd81c099964d188c8152f670a5b45e8739954..d4818b430aad556cec959d8be221eb7548a55707 100755 (executable)
--- a/t/t6050-replace.sh
+++ b/t/t6050-replace.sh
@@ -70,6 +70,13 @@ test_expect_success 'replace the author' '
      git show $HASH2 | grep "O Thor"
 '
 
+test_expect_success 'test --no-replace-objects option' '
+     git cat-file commit $HASH2 | grep "author O Thor" &&
+     git --no-replace-objects cat-file commit $HASH2 | grep "author A U Thor" &&
+     git show $HASH2 | grep "O Thor" &&
+     git --no-replace-objects show $HASH2 | grep "A U Thor"
+'
+
 cat >tag.sig <<EOF
 object $HASH2
 type commit