From: John Cai <johncai86@xxxxxxxxx>
44451a2 (attr: teach "--attr-source=<tree>" global option to "git",
2023-05-06) provided the ability to pass in a treeish as the attr
source. In the context of serving Git repositories as bare repos like we
do at GitLab however, it would be easier to point --attr-source to HEAD
for all commands by setting it once.
Add a new config attr.tree that allows this.
Signed-off-by: John Cai <johncai86@xxxxxxxxx>
---
Documentation/config.txt | 2 +
Documentation/config/attr.txt | 7 ++++
attr.c | 7 ++++
attr.h | 2 +
config.c | 16 ++++++++
t/t0003-attributes.sh | 73 +++++++++++++++++++++++++++++++++++
6 files changed, 107 insertions(+)
create mode 100644 Documentation/config/attr.txt
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 229b63a454c..b1891c2b5af 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -371,6 +371,8 @@ other popular tools, and describe them in your documentation.
include::config/advice.txt[]
+include::config/attr.txt[]
+
include::config/core.txt[]
include::config/add.txt[]
diff --git a/Documentation/config/attr.txt b/Documentation/config/attr.txt
new file mode 100644
index 00000000000..1a482d6af2b
--- /dev/null
+++ b/Documentation/config/attr.txt
@@ -0,0 +1,7 @@
+attr.tree::
+ A reference to a tree in the repository from which to read attributes,
+ instead of the `.gitattributes` file in the working tree. In a bare
+ repository, this defaults to `HEAD:.gitattributes`. If the value does
+ not resolve to a valid tree object, an empty tree is used instead.
+ When the `GIT_ATTR_SOURCE` environment variable or `--attr-source`
+ command line option are used, this configuration variable has no effect.
diff --git a/attr.c b/attr.c
index bf2ea1626a6..e62876dfd3e 100644
--- a/attr.c
+++ b/attr.c
@@ -24,6 +24,8 @@
#include "tree-walk.h"
#include "object-name.h"
+const char *git_attr_tree;
+
const char git_attr__true[] = "(builtin)true";
const char git_attr__false[] = "\0(builtin)false";
static const char git_attr__unknown[] = "(builtin)unknown";
@@ -1206,6 +1208,11 @@ static void compute_default_attr_source(struct object_id *attr_source)
if (!default_attr_source_tree_object_name)
default_attr_source_tree_object_name = getenv(GIT_ATTR_SOURCE_ENVIRONMENT);
+ if (!default_attr_source_tree_object_name && git_attr_tree) {
+ default_attr_source_tree_object_name = git_attr_tree;
+ ignore_bad_attr_tree = 1;
+ }
+
if (!default_attr_source_tree_object_name &&
startup_info->have_repository &&
is_bare_repository()) {
diff --git a/attr.h b/attr.h
index 2b745df4054..127998ae013 100644
--- a/attr.h
+++ b/attr.h
@@ -236,4 +236,6 @@ const char *git_attr_global_file(void);
/* Return whether the system gitattributes file is enabled and should be used. */
int git_attr_system_is_enabled(void);
+extern const char *git_attr_tree;
+
#endif /* ATTR_H */
diff --git a/config.c b/config.c
index 3846a37be97..fb6a2db1d9b 100644
--- a/config.c
+++ b/config.c
@@ -18,6 +18,7 @@
#include "repository.h"
#include "lockfile.h"
#include "mailmap.h"
+#include "attr.h"
#include "exec-cmd.h"
#include "strbuf.h"
#include "quote.h"
@@ -1904,6 +1905,18 @@ static int git_default_mailmap_config(const char *var, const char *value)
return 0;
}
+static int git_default_attr_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "attr.tree"))
+ return git_config_string(&git_attr_tree, var, value);
+
+ /*
+ * Add other attribute related config variables here and to
+ * Documentation/config/attr.txt.
+ */
+ return 0;
+}
+
int git_default_config(const char *var, const char *value,
const struct config_context *ctx, void *cb)
{
@@ -1927,6 +1940,9 @@ int git_default_config(const char *var, const char *value,
if (starts_with(var, "mailmap."))
return git_default_mailmap_config(var, value);
+ if (starts_with(var, "attr."))
+ return git_default_attr_config(var, value);
+
if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
return git_default_advice_config(var, value);
diff --git a/t/t0003-attributes.sh b/t/t0003-attributes.sh
index 5665cdc079f..e9953ce19c5 100755
--- a/t/t0003-attributes.sh
+++ b/t/t0003-attributes.sh
@@ -40,6 +40,10 @@ attr_check_source () {
test_cmp expect actual &&
test_must_be_empty err
+ git $git_opts -c "attr.tree=$source" check-attr test -- "$path" >actual 2>err &&
+ test_cmp expect actual &&
+ test_must_be_empty err
+
GIT_ATTR_SOURCE="$source" git $git_opts check-attr test -- "$path" >actual 2>err &&
test_cmp expect actual &&
test_must_be_empty err
@@ -342,6 +346,55 @@ test_expect_success 'bare repository: check that .gitattribute is ignored' '
)
'
+bad_attr_source_err="fatal: bad --attr-source or GIT_ATTR_SOURCE"
+
+test_expect_success '--attr-source is bad' '
+ test_when_finished rm -rf empty &&
+ git init empty &&
+ (
+ cd empty &&
+ echo "$bad_attr_source_err" >expect_err &&
+ test_must_fail git --attr-source=HEAD check-attr test -- f/path 2>err &&
+ test_cmp expect_err err
+ )
+'
+
+test_expect_success 'attr.tree when HEAD is unborn' '
+ test_when_finished rm -rf empty &&
+ git init empty &&
+ (
+ cd empty &&
+ echo "f/path: test: unspecified" >expect &&
+ git -c attr.tree=HEAD check-attr test -- f/path >actual 2>err &&
+ test_must_be_empty err &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'attr.tree points to non-existing ref' '
+ test_when_finished rm -rf empty &&
+ git init empty &&
+ (
+ cd empty &&
+ echo "f/path: test: unspecified" >expect &&
+ git -c attr.tree=refs/does/not/exist check-attr test -- f/path >actual 2>err &&
+ test_must_be_empty err &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'bad attr source defaults to reading .gitattributes file' '
+ test_when_finished rm -rf empty &&
+ git init empty &&
+ (
+ cd empty &&
+ echo "f/path test=val" >.gitattributes &&
+ echo "f/path: test: val" >expect &&
+ git -c attr.tree=HEAD check-attr test -- f/path >actual 2>err &&
+ test_must_be_empty err &&
+ test_cmp expect actual
+ )
+'
test_expect_success 'bare repo defaults to reading .gitattributes from HEAD' '
test_when_finished rm -rf test bare_with_gitattribute &&
@@ -353,6 +406,26 @@ test_expect_success 'bare repo defaults to reading .gitattributes from HEAD' '
test_cmp expect actual
'
+test_expect_success 'precedence of --attr-source, GIT_ATTR_SOURCE, then attr.tree' '
+ test_when_finished rm -rf empty &&
+ git init empty &&
+ (
+ cd empty &&
+ git checkout -b attr-source &&
+ test_commit "val1" .gitattributes "f/path test=val1" &&
+ git checkout -b attr-tree &&
+ test_commit "val2" .gitattributes "f/path test=val2" &&
+ git checkout attr-source &&
+ echo "f/path: test: val1" >expect &&
+ GIT_ATTR_SOURCE=attr-source git -c attr.tree=attr-tree --attr-source=attr-source \
+ check-attr test -- f/path >actual &&
+ test_cmp expect actual &&
+ GIT_ATTR_SOURCE=attr-source git -c attr.tree=attr-tree \
+ check-attr test -- f/path >actual &&
+ test_cmp expect actual
+ )
+'
+
test_expect_success 'bare repository: with --source' '
(
cd bare.git &&
--
gitgitgadget
