grafanaPlugins: init

This contains the base infrastructure (including a basic update script)
for maintaining Grafana plugins inside Nix, which, in a subsequent
commit, will be used for allowing the NixOS Grafana module to
automatically install plugins.

pkgs/servers/monitoring/grafana/plugins/default.nix

@@ -0,0 +1,7 @@
+{ newScope, pkgs }:
+
+let
+  callPackage = newScope (pkgs // plugins);
+  plugins = import ./plugins.nix { inherit callPackage; };
+in
+  plugins

pkgs/servers/monitoring/grafana/plugins/grafana-plugin.nix

@@ -0,0 +1,28 @@
+{ stdenvNoCC, fetchurl, unzip }:
+
+{ pname, version, zipHash, meta ? {}, passthru ? {}, ... }@args:
+stdenvNoCC.mkDerivation ({
+  inherit pname version;
+
+  src = fetchurl {
+    name = "${pname}-${version}.zip";
+    url = "https://grafana.com/api/plugins/${pname}/versions/${version}/download";
+    hash = zipHash;
+  };
+
+  nativeBuildInputs = [ unzip ];
+
+  installPhase = ''
+    cp -R "." "$out"
+    chmod -R a-w "$out"
+    chmod u+w "$out"
+  '';
+
+  passthru = {
+    updateScript = [ ./update-grafana-plugin.sh pname ];
+  } // passthru;
+
+  meta = {
+    homepage = "https://grafana.com/grafana/plugins/${pname}";
+  } // meta;
+} // (builtins.removeAttrs args [ "pname" "version" "sha256" "meta" ]))

pkgs/servers/monitoring/grafana/plugins/plugins.nix

@@ -0,0 +1,6 @@
+{ callPackage }:
+{
+  inherit callPackage;
+
+  grafanaPlugin = callPackage ./grafana-plugin.nix { };
+}

pkgs/servers/monitoring/grafana/plugins/update-grafana-plugin.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq common-updater-scripts
+
+set -eu -o pipefail
+
+readonly plugin_name="$1"
+readonly latest_version="$(curl "https://grafana.com/api/plugins/${plugin_name}" | jq -r .version)"
+update-source-version "grafanaPlugins.${plugin_name}" "$latest_version"

pkgs/top-level/all-packages.nix

@@ -17164,6 +17164,7 @@ in
   gofish = callPackage ../servers/gopher/gofish { };
 
   grafana = callPackage ../servers/monitoring/grafana { };
+  grafanaPlugins = dontRecurseIntoAttrs (callPackage ../servers/monitoring/grafana/plugins { });
 
   grafana-loki = callPackage ../servers/monitoring/loki { };