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cache.h: Introduce a generic "xdg_config_home_for(…)" function

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Current implementation of `xdg_config_home(filename)` returns
`$XDG_CONFIG_HOME/git/$filename`, with the `git` subdirectory inserted
between the `XDG_CONFIG_HOME` environment variable and the parameter.

This patch introduces a `xdg_config_home_for(subdir, filename)` function
which is more generic. It only concatenates "$XDG_CONFIG_HOME", or
"$HOME/.config" if the former isn’t defined, with the parameters,
without adding `git` in between.

`xdg_config_home(filename)` is now implemented by calling
`xdg_config_home_for("git", filename)` but this new generic function can
be used to compute the configuration directory of other programs.

Signed-off-by: Lénaïc Huard <lenaic@lhuard.fr>
Acked-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Lénaïc Huard
2021-09-04 22:54:58 +02:00
committed by Junio C Hamano
parent ebf3c04b26
commit cb7db5bbd5
2 changed files with 17 additions and 3 deletions
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7
cache.h
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@ -1286,6 +1286,13 @@ int is_ntfs_dotmailmap(const char *name);
*/
int looks_like_command_line_option(const char *str);
/**
* Return a newly allocated string with the evaluation of
* "$XDG_CONFIG_HOME/$subdir/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
* "$HOME/.config/$subdir/$filename". Return NULL upon error.
*/
char *xdg_config_home_for(const char *subdir, const char *filename);
/**
* Return a newly allocated string with the evaluation of
* "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise