Merge pull request #19861 from womfoo/fix/netdata

netdata: allow execution without a config file

pkgs/tools/system/netdata/default.nix

@@ -13,11 +13,22 @@ stdenv.mkDerivation rec{
 
   buildInputs = [ autoreconfHook zlib pkgconfig libuuid ];
 
-  preConfigure = ''
-    export ZLIB_CFLAGS=" "
-    export ZLIB_LIBS="-lz"
-    export UUID_CFLAGS=" "
-    export UUID_LIBS="-luuid"
+  # Allow UI to load when running as non-root
+  patches = [ ./web_access.patch ];
+
+  # Build will fail trying to create /var/{cache,lib,log}/netdata without this
+  postPatch = ''
+   sed -i '/dist_.*_DATA = \.keep/d' src/Makefile.am
+  '';
+
+  configureFlags = [
+    "--localstatedir=/var"
+  ];
+
+  # App fails on runtime if the default config file is not detected
+  # The upstream installer does prepare an empty file too
+  postInstall = ''
+    touch $out/etc/netdata/netdata.conf
   '';
 
   meta = with stdenv.lib; {

pkgs/tools/system/netdata/web_access.patch

@@ -0,0 +1,20 @@
+--- a/src/web_client.c.orig
++++ b/src/web_client.c
+@@ -331,7 +331,7 @@
+         buffer_sprintf(w->response.data, "File '%s' does not exist, or is not accessible.", webfilename);
+         return 404;
+     }
+-
++#if 0
+     // check if the file is owned by expected user
+     if(stat.st_uid != web_files_uid()) {
+         error("%llu: File '%s' is owned by user %u (expected user %u). Access Denied.", w->id, webfilename, stat.st_uid, web_files_uid());
+@@ -345,7 +345,7 @@
+         buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
+         return 403;
+     }
+-
++#endif
+     if((stat.st_mode & S_IFMT) == S_IFDIR) {
+         snprintfz(webfilename, FILENAME_MAX, "%s/index.html", filename);
+         return mysendfile(w, webfilename);