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path: unify the two config file lookup functions 

Share most of the implementation of config file lookup between
mp_find_all_config_files() and mp_find_config_file().

Also move the check for config path overrides to mp_get_platform_path()
directly. From the point of view of config file lookup, this is a bit
stupid, but on the other hand increases consistency, as user path
resolution exposes the mp_get_platform_path() functionality directly to
the user.
This commit is contained in:
wm4 2015-05-09 13:50:47 +02:00
parent 5631060569
commit 2263f37dfb
1 changed files with 60 additions and 83 deletions
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141
options/path.c
View File

@ -43,16 +43,8 @@
#include "osdep/io.h"
#include "osdep/path.h"
#define MAX_CONFIG_PATHS 32
static const char *mp_get_forced_home(void *talloc_ctx, const char *type)
{
return strcmp(type, "home") == 0 ? getenv("MPV_HOME") : NULL;
}
// In order of increasing priority: the first hiz has highest priority.
// In order of decreasing priority: the first has highest priority.
static const mp_get_platform_path_cb path_resolvers[] = {
mp_get_forced_home,
#if HAVE_COCOA
mp_get_platform_path_osx,
#endif
@ -64,8 +56,33 @@ static const mp_get_platform_path_cb path_resolvers[] = {
#endif
};
static const char *mp_get_platform_path(void *talloc_ctx, const char *type)
// from highest (most preferred) to lowest priority
static const char *const config_dirs[] = {
"home",
"old_home",
"osxbundle",
"global",
};
// Return a platform specific path using a path type as defined in osdep/path.h.
// Keep in mind that the only way to free the return value is freeing talloc_ctx
// (or its children), as this function can return a statically allocated string.
static const char *mp_get_platform_path(void *talloc_ctx,
struct mpv_global *global,
const char *type)
{
assert(talloc_ctx);
const char *force_configdir = getenv("MPV_HOME");
if (global->opts->force_configdir && global->opts->force_configdir[0])
force_configdir = global->opts->force_configdir;
if (force_configdir) {
for (int n = 0; n < MP_ARRAY_SIZE(config_dirs); n++) {
if (strcmp(config_dirs[n], type) == 0)
return n == 0 ? force_configdir : NULL;
}
}
for (int n = 0; n < MP_ARRAY_SIZE(path_resolvers); n++) {
const char *path = path_resolvers[n](talloc_ctx, type);
if (path && path[0])
@ -74,86 +91,29 @@ static const char *mp_get_platform_path(void *talloc_ctx, const char *type)
return NULL;
}
// Return NULL-terminated array of config directories, from highest to lowest
// priority
static char **mp_config_dirs(void *talloc_ctx, struct mpv_global *global)
{
struct MPOpts *opts = global->opts;
char **ret = talloc_zero_array(talloc_ctx, char*, MAX_CONFIG_PATHS + 1);
int num_ret = 0;
if (!opts->load_config)
return ret;
if (opts->force_configdir && opts->force_configdir[0]) {
ret[0] = talloc_strdup(ret, opts->force_configdir);
return ret;
}
// from highest (most preferred) to lowest priority
static const char *const configdirs[] = {
"home",
"old_home",
"osxbundle",
"global",
};
for (int n = 0; n < MP_ARRAY_SIZE(configdirs); n++) {
const char *path = mp_get_platform_path(ret, configdirs[n]);
if (path && path[0] && num_ret < MAX_CONFIG_PATHS)
ret[num_ret++] = (char *)path;
}
MP_VERBOSE(global, "search dirs:");
for (int n = 0; n < num_ret; n++)
MP_VERBOSE(global, " %s", ret[n]);
MP_VERBOSE(global, "\n");
return ret;
}
char *mp_find_config_file(void *talloc_ctx, struct mpv_global *global,
static char **mp_find_all_config_files_limited(void *talloc_ctx,
struct mpv_global *global,
int max_files,
const char *filename)
{
char *res = NULL;
char **dirs = mp_config_dirs(NULL, global);
for (int i = 0; dirs && dirs[i]; i++) {
char *file = talloc_asprintf(talloc_ctx, "%s/%s", dirs[i], filename);
if (mp_path_exists(file)) {
res = file;
break;
}
talloc_free(file);
}
talloc_free(dirs);
MP_VERBOSE(global, "config path: '%s' -> '%s'\n", filename,
res ? res : "(NULL)");
return res;
}
char **mp_find_all_config_files(void *talloc_ctx, struct mpv_global *global,
const char *filename)
{
char **ret = talloc_zero_array(talloc_ctx, char*, MAX_CONFIG_PATHS + 1);
char **ret = talloc_array(talloc_ctx, char*, 2); // 2 preallocated
int num_ret = 0;
char **dirs = mp_config_dirs(NULL, global);
for (int i = 0; dirs && dirs[i]; i++) {
for (int i = 0; i < MP_ARRAY_SIZE(config_dirs); i++) {
const char *dir = mp_get_platform_path(ret, global, config_dirs[i]);
bstr s = bstr0(filename);
while (s.len) {
while (dir && num_ret < max_files && s.len) {
bstr fn;
bstr_split_tok(s, "|", &fn, &s);
char *file = talloc_asprintf(ret, "%s/%.*s", dirs[i], BSTR_P(fn));
if (mp_path_exists(file) && num_ret < MAX_CONFIG_PATHS)
ret[num_ret++] = file;
char *file = talloc_asprintf(ret, "%s/%.*s", dir, BSTR_P(fn));
if (mp_path_exists(file))
MP_TARRAY_APPEND(NULL, ret, num_ret, file);
}
}
talloc_free(dirs);
MP_TARRAY_GROW(NULL, ret, num_ret);
ret[num_ret] = NULL;
for (int n = 0; n < num_ret / 2; n++)
MPSWAP(char*, ret[n], ret[num_ret - n - 1]);
@ -166,6 +126,21 @@ char **mp_find_all_config_files(void *talloc_ctx, struct mpv_global *global,
return ret;
}
char **mp_find_all_config_files(void *talloc_ctx, struct mpv_global *global,
const char *filename)
{
return mp_find_all_config_files_limited(talloc_ctx, global, 64, filename);
}
char *mp_find_config_file(void *talloc_ctx, struct mpv_global *global,
const char *filename)
{
char **l = mp_find_all_config_files_limited(talloc_ctx, global, 1, filename);
char *r = l && l[0] ? talloc_steal(talloc_ctx, l[0]) : NULL;
talloc_free(l);
return r;
}
char *mp_get_user_path(void *talloc_ctx, struct mpv_global *global,
const char *path)
{
@ -183,10 +158,12 @@ char *mp_get_user_path(void *talloc_ctx, struct mpv_global *global,
} else if (bstr_equals0(prefix, "")) {
res = mp_path_join(talloc_ctx, bstr0(getenv("HOME")), rest);
} else if (bstr_eatstart0(&prefix, "~")) {
void *tmp = talloc_new(NULL);
char type[80];
snprintf(type, sizeof(type), "%.*s", BSTR_P(prefix));
const char *p = mp_get_platform_path(talloc_ctx, type);
const char *p = mp_get_platform_path(tmp, global, type);
res = mp_path_join(talloc_ctx, bstr0(p), rest);
talloc_free(tmp);
}
}
}
@ -335,7 +312,7 @@ void mp_mkdirp(const char *dir)
void mp_mk_config_dir(struct mpv_global *global, char *subdir)
{
void *tmp = talloc_new(NULL);
char *dir = mp_config_dirs(tmp, global)[0];
const char *dir = mp_get_platform_path(tmp, global, "home");
if (dir) {
dir = talloc_asprintf(tmp, "%s/%s", dir, subdir);