Re: [PATCH] add documentation for writing config files

> Replace TODO introduced in commit 9c3c22 with documentation
> explaining Git config API functions for writing configuration
> files.
>
> Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
> ---
> Documentation/technical/api-config.txt | 31 
> ++++++++++++++++++++++++++++++-
> 1 file changed, 30 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/technical/api-config.txt 
> b/Documentation/technical/api-config.txt
> index 230b3a0..df08385 100644
> --- a/Documentation/technical/api-config.txt
> +++ b/Documentation/technical/api-config.txt
> @@ -137,4 +137,33 @@ int read_file_with_include(const char *file, 
> config_fn_t fn, void *data)
> Writing Config Files
> --------------------
>
> -TODO
> +Git gives multiple entry points in the Config API to write config 
> values to
> +files namely `git_config_set_in_file` and `git_config_set`, which 
> write to
> +a specific config file or to `.git/config` respectively. They both 
> take a
> +key/value pair as parameter.
> +In the end they both all call `git_config_set_multivar_in_file` which 
> takes

> +four parameters:
> +
> +- the name of the file, as a string, to which key/value pairs will be 
> written.
> +
> +- the name of key, as a string. This is in canonical "flat" form: the 
> section,
> +  subsection, and variable segments will be separated by dots, and 
> the section
> +  and variable segments will be all lowercase.
> +  E.g., `core.ignorecase`, `diff.SomeType.textconv`.
> +
> +- the value of the variable, as a string. If value is equal to NULL, 
> it will
> +  remove the matching key from the config file.
> +
> +- the value regex, as a string. It will disregard key/value pairs 
> where value
> +  does not match.
> +
> +- a multi_replace value, as an int. If value is equal to zero, 
> nothing or only
> +  one matching key/value is replaced, else all matching key/values 
> (regardless
> +  how many) are removed, before the new pair is written.
> +
> +It returns 0 on success.
> +
> +Also, there are functions `git_config_rename_section` and
> +`git_config_rename_section_in_file` with parameters `old_name` and 
> `new_name`
> +for renaming or removing sections in the config files. If NULL is 
> passed
> +through `new_name` parameter, the section will be removed from the 
> config file.
> -- 
> 1.9.0.GIT
>
> --