mirror of
https://github.com/git/git.git
synced 2024-11-18 15:04:49 +01:00
530e741c72
Most of them are still stubs, but the procedure to build the HTML documentation, maintaining the index and installing the end product are there. I placed names of people who are likely to know the most about the topic in the stub files, so that volunteers will know whom to ask questions as needed. Signed-off-by: Junio C Hamano <gitster@pobox.com>
111 lines
3 KiB
Text
111 lines
3 KiB
Text
gitattributes API
|
|
=================
|
|
|
|
gitattributes mechanism gives a uniform way to associate various
|
|
attributes to set of paths.
|
|
|
|
|
|
Data Structure
|
|
--------------
|
|
|
|
`struct git_attr`::
|
|
|
|
An attribute is an opaque object that is identified by its name.
|
|
Pass the name and its length to `git_attr()` function to obtain
|
|
the object of this type. The internal representation of this
|
|
structure is of no interest to the calling programs.
|
|
|
|
`struct git_attr_check`::
|
|
|
|
This structure represents a set of attributes to check in a call
|
|
to `git_checkattr()` function, and receives the results.
|
|
|
|
|
|
Calling Sequence
|
|
----------------
|
|
|
|
* Prepare an array of `struct git_attr_check` to define the list of
|
|
attributes you would want to check. To populate this array, you would
|
|
need to define necessary attributes by calling `git_attr()` function.
|
|
|
|
* Call git_checkattr() to check the attributes for the path.
|
|
|
|
* Inspect `git_attr_check` structure to see how each of the attribute in
|
|
the array is defined for the path.
|
|
|
|
|
|
Attribute Values
|
|
----------------
|
|
|
|
An attribute for a path can be in one of four states: Set, Unset,
|
|
Unspecified or set to a string, and `.value` member of `struct
|
|
git_attr_check` records it. There are three macros to check these:
|
|
|
|
`ATTR_TRUE()`::
|
|
|
|
Returns true if the attribute is Set for the path.
|
|
|
|
`ATTR_FALSE()`::
|
|
|
|
Returns true if the attribute is Unset for the path.
|
|
|
|
`ATTR_UNSET()`::
|
|
|
|
Returns true if the attribute is Unspecified for the path.
|
|
|
|
If none of the above returns true, `.value` member points at a string
|
|
value of the attribute for the path.
|
|
|
|
|
|
Example
|
|
-------
|
|
|
|
To see how attributes "crlf" and "indent" are set for different paths.
|
|
|
|
. Prepare an array of `struct git_attr_check` with two elements (because
|
|
we are checking two attributes). Initialize their `attr` member with
|
|
pointers to `struct git_attr` obtained by calling `git_attr()`:
|
|
|
|
------------
|
|
static struct git_attr_check check[2];
|
|
static void setup_check(void)
|
|
{
|
|
if (check[0].attr)
|
|
return; /* already done */
|
|
check[0].attr = git_attr("crlf", 4);
|
|
check[1].attr = git_attr("ident", 5);
|
|
}
|
|
------------
|
|
|
|
. Call `git_checkattr()` with the prepared array of `struct git_attr_check`:
|
|
|
|
------------
|
|
const char *path;
|
|
|
|
setup_check();
|
|
git_checkattr(path, ARRAY_SIZE(check), check);
|
|
------------
|
|
|
|
. Act on `.value` member of the result, left in `check[]`:
|
|
|
|
------------
|
|
const char *value = check[0].value;
|
|
|
|
if (ATTR_TRUE(value)) {
|
|
The attribute is Set, by listing only the name of the
|
|
attribute in the gitattributes file for the path.
|
|
} else if (ATTR_FALSE(value)) {
|
|
The attribute is Unset, by listing the name of the
|
|
attribute prefixed with a dash - for the path.
|
|
} else if (ATTR_UNSET(value)) {
|
|
The attribute is not set nor unset for the path.
|
|
} else if (!strcmp(value, "input")) {
|
|
If none of ATTR_TRUE(), ATTR_FALSE(), or ATTR_UNSET() is
|
|
true, the value is a string set in the gitattributes
|
|
file for the path by saying "attr=value".
|
|
} else if (... other check using value as string ...) {
|
|
...
|
|
}
|
|
------------
|
|
|
|
(JC)
|