Re: [PATCHv6 1/4] Read (but not write) from $XDG_CONFIG_HOME/git/config file

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> +char *mkpathdup(const char *fmt, ...)
> +{
> +	char path[PATH_MAX];
> +	va_list args;
> +	unsigned len;
> +
> +	va_start(args, fmt);
> +	len = vsnprintf(path, sizeof(path), fmt, args);
> +	va_end(args);
> +	if (len >= sizeof(path))
> +		return xstrdup(bad_path);
> +	return xstrdup(cleanup_path(path));
> +}

Hrmph. If a new helper is introduced anyway, wouldn't it be a better
idea to get rid of the hardcoded PATH_MAX limitation, perhaps using
strbuf_vaddf() or something in the implementation of this function?

> diff --git a/t/t1306-xdg-files.sh b/t/t1306-xdg-files.sh
> new file mode 100755
> index 0000000..5b971d9
> --- /dev/null
> +++ b/t/t1306-xdg-files.sh
> @@ -0,0 +1,70 @@
> ...
> +test_expect_success 'read with --get: xdg file exists and ~/.gitconfig doesn'\''t' '
> +	rm .gitconfig &&

"rm -f .gitconfig"; always consider the possibility that any part of
the previous test could have been omitted or failed.
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