On Fri, Mar 7, 2014 at 9:47 PM, Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> wrote:
> We allow the user to relocate certain paths out of $GIT_DIR via
> environment variables, e.g. GIT_OBJECT_DIRECTORY, GIT_INDEX_FILE and
> GIT_GRAFT_FILE. Callers are not supposed to use git_path() or
> git_pathdup() to get those paths. Instead they must use
> get_object_directory(), get_index_file() and get_graft_file()
> respectively. This is inconvenient and could be missed in review (for
> example, there's git_path("objects/info/alternates") somewhere in
> sha1_file.c).
>
> This patch makes git_path() and git_pathdup() understand those
> environment variables. So if you set GIT_OBJECT_DIRECTORY to /foo/bar,
> git_path("objects/abc") should return /foo/bar/abc. The same is done
> for the two remaining env variables.
>
> "git rev-parse --git-path" is the wrapper for script use.
>
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
> ---
> Documentation/git-rev-parse.txt | 7 ++++++
> builtin/rev-parse.c | 7 ++++++
> cache.h | 1 +
> environment.c | 9 ++++++--
> path.c | 49 +++++++++++++++++++++++++++++++++++++++--
> t/t0060-path-utils.sh | 19 ++++++++++++++++
> 6 files changed, 88 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
> index 0d2cdcd..46020d9 100644
> --- a/Documentation/git-rev-parse.txt
> +++ b/Documentation/git-rev-parse.txt
> @@ -232,6 +232,13 @@ print a message to stderr and exit with nonzero status.
> repository. If <path> is a gitfile then the resolved path
> to the real repository is printed.
>
> +--git-path <path>::
> + Resolve "$GIT_DIR/<path>" and takes other path relocation
> + variables such as $GIT_OBJECT_DIRECTORY,
> + $GIT_INDEX_FILE... into account. For example, if
> + $GIT_OBJECT_DIRECTORY is set to /foo/bar then "git rev-parse
> + --git-path objects/abc" returns /tmp/bar/abc.
s/tmp/foo/
> +
> --show-cdup::
> When the command is invoked from a subdirectory, show the
> path of the top-level directory relative to the current
> diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
> index aaeb611..e50bc65 100644
> --- a/builtin/rev-parse.c
> +++ b/builtin/rev-parse.c
> @@ -518,6 +518,13 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
> for (i = 1; i < argc; i++) {
> const char *arg = argv[i];
>
> + if (!strcmp(arg, "--git-path")) {
> + if (!argv[i + 1])
> + die("--git-path requires an argument");
> + puts(git_path("%s", argv[i + 1]));
> + i++;
> + continue;
> + }
> if (as_is) {
> if (show_file(arg, output_prefix) && as_is < 2)
> verify_filename(prefix, arg, 0);
--
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