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Resolve paths relative to XDG config. paths

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This should make the programs an awful lot less painful to set up.
This commit is contained in:
Přemysl Eric Janouch
2014-07-14 22:12:04 +02:00
parent b0cf09fb4c
commit 18cb2941f3
3 changed files with 132 additions and 101 deletions
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134
src/common.c
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@@ -1359,6 +1359,58 @@ get_xdg_home_dir (struct str *output, const char *var, const char *def)
}
}
static void
get_xdg_config_dirs (struct str_vector *out)
{
struct str config_home;
str_init (&config_home);
get_xdg_home_dir (&config_home, "XDG_CONFIG_HOME", ".config");
str_vector_add (out, config_home.str);
str_free (&config_home);
const char *xdg_config_dirs;
if ((xdg_config_dirs = getenv ("XDG_CONFIG_DIRS")))
split_str_ignore_empty (xdg_config_dirs, ':', out);
}
static char *
resolve_config_filename (const char *filename)
{
// Absolute path is absolute
if (*filename == '/')
return xstrdup (filename);
struct str_vector paths;
str_vector_init (&paths);
get_xdg_config_dirs (&paths);
struct str file;
str_init (&file);
char *result = NULL;
for (unsigned i = 0; i < paths.len; i++)
{
// As per spec, relative paths are ignored
if (*paths.vector[i] != '/')
continue;
str_reset (&file);
str_append_printf (&file, "%s/" PROGRAM_NAME "/%s",
paths.vector[i], filename);
struct stat st;
if (!stat (file.str, &st))
{
result = str_steal (&file);
break;
}
}
str_vector_free (&paths);
str_free (&file);
return result;
}
static size_t io_error_domain_tag;
#define IO_ERROR (error_resolve_domain (&io_error_domain_tag))
@@ -1729,45 +1781,6 @@ struct config_item
const char *description;
};
static FILE *
get_config_file (void)
{
struct str_vector paths;
struct str config_home, file;
const char *xdg_config_dirs;
unsigned i;
FILE *fp = NULL;
str_vector_init (&paths);
str_init (&config_home);
get_xdg_home_dir (&config_home, "XDG_CONFIG_HOME", ".config");
str_vector_add (&paths, config_home.str);
str_free (&config_home);
if ((xdg_config_dirs = getenv ("XDG_CONFIG_DIRS")))
split_str_ignore_empty (xdg_config_dirs, ':', &paths);
str_init (&file);
for (i = 0; i < paths.len; i++)
{
// As per spec, relative paths are ignored
if (*paths.vector[i] != '/')
continue;
str_reset (&file);
str_append (&file, paths.vector[i]);
str_append (&file, "/" PROGRAM_NAME "/" PROGRAM_NAME ".conf");
if ((fp = fopen (file.str, "r")))
break;
}
str_free (&file);
str_vector_free (&paths);
return fp;
}
static void
load_config_defaults (struct str_map *config, const struct config_item *table)
{
@@ -1781,16 +1794,23 @@ load_config_defaults (struct str_map *config, const struct config_item *table)
static bool
read_config_file (struct str_map *config, struct error **e)
{
struct str line;
FILE *fp = get_config_file ();
unsigned line_no = 0;
bool errors = false;
if (!fp)
char *filename = resolve_config_filename (PROGRAM_NAME ".conf");
if (!filename)
return true;
FILE *fp = fopen (filename, "r");
if (!fp)
{
error_set (e, IO_ERROR, IO_ERROR_FAILED,
"could not open `%s' for reading: %s", filename, strerror (errno));
return false;
}
struct str line;
str_init (&line);
for (line_no = 1; read_line (fp, &line); line_no++)
bool errors = false;
for (unsigned line_no = 1; read_line (fp, &line); line_no++)
{
char *start = line.str;
if (*start == '#')
@@ -1894,3 +1914,25 @@ error:
return NULL;
}
static void
call_write_default_config (const char *hint, const struct config_item *table)
{
static const char *prolog =
"# " PROGRAM_NAME " " PROGRAM_VERSION " configuration file\n"
"#\n"
"# Relative paths are searched for in ${XDG_CONFIG_HOME:-~/.config}\n"
"# /" PROGRAM_NAME " as well as in $XDG_CONFIG_DIRS/" PROGRAM_NAME "\n"
"\n";
struct error *e = NULL;
char *filename = write_default_config (hint, prolog, table, &e);
if (!filename)
{
print_fatal ("%s", e->message);
error_free (e);
exit (EXIT_FAILURE);
}
print_status ("configuration written to `%s'", filename);
free (filename);
}