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remote: move relative_url()

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This method was initially written in 63e95beb0 (submodule: port
resolve_relative_url from shell to C, 2016-05-15). As we will need
similar functionality in the bundle URI feature, extract this to be
available in remote.h.

The code is almost exactly the same, except for the following trivial
differences:

 * Fix whitespace and wrapping issues with the prototype and argument
   lists.

 * Let's call starts_with_dot_{,dot_}slash_native() instead of the
   functionally identical "starts_with_dot_{,dot_}slash()" wrappers
   "builtin/submodule--helper.c".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2022-05-16 20:11:03 +00:00
committed by Junio C Hamano
parent c1d024b843
commit 1d04e719e7
3 changed files with 134 additions and 129 deletions
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31
remote.h
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@ -409,4 +409,35 @@ int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
int is_empty_cas(const struct push_cas_option *);
void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);
/*
* The `url` argument is the URL that navigates to the submodule origin
* repo. When relative, this URL is relative to the superproject origin
* URL repo. The `up_path` argument, if specified, is the relative
* path that navigates from the submodule working tree to the superproject
* working tree. Returns the origin URL of the submodule.
*
* Return either an absolute URL or filesystem path (if the superproject
* origin URL is an absolute URL or filesystem path, respectively) or a
* relative file system path (if the superproject origin URL is a relative
* file system path).
*
* When the output is a relative file system path, the path is either
* relative to the submodule working tree, if up_path is specified, or to
* the superproject working tree otherwise.
*
* NEEDSWORK: This works incorrectly on the domain and protocol part.
* remote_url url outcome expectation
* http://a.com/b ../c http://a.com/c as is
* http://a.com/b/ ../c http://a.com/c same as previous line, but
* ignore trailing slash in url
* http://a.com/b ../../c http://c error out
* http://a.com/b ../../../c http:/c error out
* http://a.com/b ../../../../c http:c error out
* http://a.com/b ../../../../../c .:c error out
* NEEDSWORK: Given how chop_last_dir() works, this function is broken
* when a local part has a colon in its path component, too.
*/
char *relative_url(const char *remote_url, const char *url,
const char *up_path);
#endif