Do check_repository_format() early (re-fix)

This pushes check_repository_format() (actually _gently() version)
to setup_git_directory_gently() in order to prevent from
using unsupported repositories.

New setup_git_directory_gently()'s behaviour is stop searching
for a valid gitdir and return as if there is no gitdir if a
unsupported repository is found. Warning will be thrown in these
cases.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/setup.c b/setup.c
index 8e4630ebfe2d770fc7af1c4a9b45cea58fa2480a..067f1be3f92c9f3a334c4b427f32b4f4fdb8225b 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -206,6 +206,22 @@ static const char *set_work_tree(const char *dir)
        return NULL;
 }
 
+static int check_repository_format_gently(int *nongit_ok)
+{
+       git_config(check_repository_format_version);
+       if (GIT_REPO_VERSION < repository_format_version) {
+               if (!nongit_ok)
+                       die ("Expected git repo version <= %d, found %d",
+                            GIT_REPO_VERSION, repository_format_version);
+               warning("Expected git repo version <= %d, found %d",
+                       GIT_REPO_VERSION, repository_format_version);
+               warning("Please upgrade Git");
+               *nongit_ok = -1;
+               return -1;
+       }
+       return 0;
+}
+
 /*
  * We cannot decide in this function whether we are in the work tree or
  * not, since the config can only be read _after_ this function was called.
@@ -232,12 +248,13 @@ const char *setup_git_directory_gently(int *nongit_ok)
 
                        if (!work_tree_env) {
                                retval = set_work_tree(gitdirenv);
-                               /* config may override worktree
-                                * see set_work_tree comment */
-                               check_repository_format();
+                               /* config may override worktree */
+                               if (check_repository_format_gently(nongit_ok))
+                                       return NULL;
                                return retval;
                        }
-                       check_repository_format();
+                       if (check_repository_format_gently(nongit_ok))
+                               return NULL;
                        retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
                                        get_git_work_tree());
                        if (!retval || !*retval)
@@ -246,7 +263,6 @@ const char *setup_git_directory_gently(int *nongit_ok)
                        if (chdir(work_tree_env) < 0)
                                die ("Could not chdir to %s", work_tree_env);
                        strcat(buffer, "/");
-                       inside_work_tree = 1;
                        return retval;
                }
                if (nongit_ok) {
@@ -277,7 +293,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
                        if (!work_tree_env)
                                inside_work_tree = 0;
                        setenv(GIT_DIR_ENVIRONMENT, ".", 1);
-                       check_repository_format();
+                       check_repository_format_gently(nongit_ok);
                        return NULL;
                }
                chdir("..");
@@ -298,7 +314,8 @@ const char *setup_git_directory_gently(int *nongit_ok)
        if (!work_tree_env)
                inside_work_tree = 1;
        git_work_tree_cfg = xstrndup(cwd, offset);
-       check_repository_format();
+       if (check_repository_format_gently(nongit_ok))
+               return NULL;
        if (offset == len)
                return NULL;
 
@@ -349,16 +366,13 @@ int check_repository_format_version(const char *var, const char *value)
 
 int check_repository_format(void)
 {
-       git_config(check_repository_format_version);
-       if (GIT_REPO_VERSION < repository_format_version)
-               die ("Expected git repo version <= %d, found %d",
-                    GIT_REPO_VERSION, repository_format_version);
-       return 0;
+       return check_repository_format_gently(NULL);
 }
 
 const char *setup_git_directory(void)
 {
        const char *retval = setup_git_directory_gently(NULL);
+       check_repository_format();
 
        /* If the work tree is not the default one, recompute prefix */
        if (inside_work_tree < 0) {

diff --git a/t/t1302-repo-version.sh b/t/t1302-repo-version.sh
new file mode 100755 (executable)
index 0000000..37fc1c8
--- /dev/null
+++ b/t/t1302-repo-version.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Nguyễn Thái Ngọc Duy
+#
+
+test_description='Test repository version check'
+
+. ./test-lib.sh
+
+cat >test.patch <<EOF
+diff --git a/test.txt b/test.txt
+new file mode 100644
+--- /dev/null
++++ b/test.txt
+@@ -0,0 +1 @@
++123
+EOF
+
+test_create_repo "test"
+test_create_repo "test2"
+
+GIT_CONFIG=test2/.git/config git config core.repositoryformatversion 99 || exit 1
+
+test_expect_success 'gitdir selection on normal repos' '
+       (test "$(git config core.repositoryformatversion)" = 0 &&
+       cd test &&
+       test "$(git config core.repositoryformatversion)" = 0)'
+
+# Make sure it would stop at test2, not trash
+test_expect_success 'gitdir selection on unsupported repo' '
+       (cd test2 &&
+       test "$(git config core.repositoryformatversion)" = 99)'
+
+test_expect_success 'gitdir not required mode' '
+       (git apply --stat test.patch &&
+       cd test && git apply --stat ../test.patch &&
+       cd ../test2 && git apply --stat ../test.patch)'
+
+test_expect_success 'gitdir required mode on normal repos' '
+       (git apply --check --index test.patch &&
+       cd test && git apply --check --index ../test.patch)'
+
+test_expect_failure 'gitdir required mode on unsupported repo' '
+       (cd test2 && git apply --check --index ../test.patch)'
+
+test_done