src: darwin/dirs: Implement fallbacks for posix style installations

For posix-style installations, use the defined directories
for libraries and data.

With that, running vlc from the install dirs works fine in principle.
What is left to do currently is to adapt the RPATH to find the
libvlc libraries.

bin/darwinvlc.m

@@ -132,6 +132,7 @@ int main(int i_argc, const char *ppsz_argv[])
 #ifdef TOP_BUILDDIR
     setenv("VLC_PLUGIN_PATH", TOP_BUILDDIR"/modules", 1);
     setenv("VLC_DATA_PATH", TOP_SRCDIR"/share", 1);
+    setenv("VLC_LIB_PATH", TOP_BUILDDIR"/modules", 1);
 #endif
 
 #ifndef ALLOW_RUN_AS_ROOT

src/darwin/dirs.m

@@ -36,16 +36,21 @@
 
 #include <Foundation/Foundation.h>
 
-static bool isBundle()
+static bool config_isBundle()
 {
     NSBundle *bundle = [NSBundle mainBundle];
     NSString *bundlePath = bundle.bundlePath;
     return [bundlePath hasSuffix:@".app"] || [bundlePath hasSuffix:@".framework"];
 }
 
-char *config_GetLibDir (void)
+static char *config_getLibraryDirReal(const char *fallback)
 {
-    if (isBundle()) {
+    const char *dir = getenv("VLC_LIB_PATH");
+    if (dir) {
+        return strdup(dir);
+    }
+
+    if (config_isBundle()) {
         NSBundle *bundle = [NSBundle mainBundle];
         NSString *path = bundle.privateFrameworksPath;
         if (!path)
@@ -54,28 +59,20 @@ char *config_GetLibDir (void)
         return strdup(path.UTF8String);
     }
 
-    /* we are not part of any Mac-style package but were installed
-     * the UNIX way. let's trick-around a bit */
-    Dl_info info;
-    if (dladdr(system_Init, &info)) {
-        char *incompletepath = strdup(dirname( (char *)info.dli_fname ));
-        char *path = NULL;
-        asprintf(&path, "%s/"PACKAGE, incompletepath);
-        free(incompletepath);
-        return path;
-    }
+    if (fallback)
+        return strdup(fallback);
 
-    /* should never happen */
-    abort ();
+    return NULL;
 }
 
-static char *config_GetDataDir(void)
+static char *config_getDataDirReal(const char *fallback)
 {
-    const char *path = getenv ("VLC_DATA_PATH");
-    if (path)
-        return strdup (path);
+    const char *dir = getenv("VLC_DATA_PATH");
+    if (dir) {
+        return strdup(dir);
+    }
 
-    if (isBundle()) {
+    if (config_isBundle()) {
         NSBundle *bundle = [NSBundle mainBundle];
         NSString *path = bundle.resourcePath;
         if (!path)
@@ -85,34 +82,54 @@ static char *config_GetDataDir(void)
         return strdup(path.UTF8String);
     }
 
-    // Fallback
-    char *vlcpath = config_GetLibDir ();
-    char *datadir;
+    if (fallback)
+        return strdup(fallback);
 
-    if (asprintf (&datadir, "%s/share", vlcpath) == -1)
-        datadir = NULL;
+    return NULL;
+}
 
-    free (vlcpath);
-    return datadir;
+char *config_GetLibDir(void)
+{
+    return config_getLibraryDirReal(LIBDIR);
 }
 
 char *config_GetSysPath(vlc_sysdir_t type, const char *filename)
 {
     char *dir = NULL;
-
     switch (type)
     {
         case VLC_PKG_DATA_DIR:
-            dir = config_GetDataDir();
+            dir = config_getDataDirReal(PKGDATADIR);
             break;
+
         case VLC_PKG_LIB_DIR:
+            dir = config_getLibraryDirReal(PKGLIBDIR);
+            break;
+        case VLC_LIB_DIR:
+            dir = config_getLibraryDirReal(LIBDIR);
+            break;
+
+
         case VLC_PKG_LIBEXEC_DIR:
-            dir = config_GetLibDir();
+            dir = config_getLibraryDirReal(PKGLIBEXECDIR);
             break;
-        case VLC_SYSDATA_DIR:
+        case VLC_LIBEXEC_DIR:
+            dir = config_getLibraryDirReal(LIBEXECDIR);
             break;
+
         case VLC_LOCALE_DIR:
-            dir = config_GetSysPath(VLC_PKG_DATA_DIR, "locale");
+            dir = config_getDataDirReal(NULL);
+            if (dir) {
+                NSString *result = [NSString stringWithFormat:@"%s/locale", dir];
+                free(dir);
+                dir = strdup(result.UTF8String);
+                break;
+            }
+
+            dir = strdup(LOCALEDIR);
+            break;
+
+        case VLC_SYSDATA_DIR:
             break;
         default:
             vlc_assert_unreachable();