grafana-image-renderer: init at 2020-12-01

This package[1] is a replacement for the old phantomjs-integration[2]
which is practically EOL. It is basically used to render PNGs of panels
that triggered an alert in Grafana.

This package internally uses `puppeteer`[3] to control a headless
Chromium instance. Even though puppeteer recommends to use a fixed
revision of `chromium`, I checked that our default `pkgs.chromium` works
fine as well. Also, I don't think it's a good idea to use outdated
browser versions[4].

I used the latest revision from `master` on purpose since compiling the
code with `tsc` from `v2.0` didn't work and I couldn't figure out why.

[1] https://grafana.com/grafana/plugins/grafana-image-renderer
[2] https://grafana.com/blog/2020/05/07/grafana-7.0-preview-new-image-renderer-plugin-to-replace-phantomjs/
[3] https://github.com/puppeteer/puppeteer
[4] currently, puppeteer v2.0.0 is used which recommends revision 706915
    (v79.0.3945.130).

pkgs/servers/monitoring/grafana-image-renderer/default.nix

@@ -0,0 +1,67 @@
+{ lib, mkYarnPackage, fetchFromGitHub, nodejs, runtimeShell }:
+
+# Notes for the upgrade:
+# * Download the tarball of the new version to use.
+# * Remove the `resolutions`-section from upstream `package.json`
+#   as this breaks with `yarn2nix`.
+# * Regenerate `yarn.lock` and `yarn2nix`.
+# * Replace new `package.json`, `yarn.nix`, `yarn.lock` here.
+# * Update `version`+`hash` and rebuild.
+
+mkYarnPackage rec {
+  name = "grafana-image-renderer-unstable";
+  version = "2020-12-01";
+
+  src = fetchFromGitHub {
+    owner = "grafana";
+    repo = "grafana-image-renderer";
+    rev = "ce1f81438e5f69c7fd7c73ce08bab624c4c92e25";
+    sha256 = "sha256-1Ke1KLLNZ1dkLH0BWB60r2c45RBbndd0eepjc0nlHVk=";
+  };
+
+  buildPhase = ''
+    runHook preBuild
+
+    pushd deps/renderer
+    npm run build
+    popd
+
+    runHook postBuild
+  '';
+
+  dontInstall = true;
+
+  packageJSON = ./package.json;
+  yarnNix = ./yarn.nix;
+  yarnLock = ./yarn.lock;
+
+  distPhase = ''
+    runHook preDist
+
+    shopt -s extglob
+
+    pushd deps/renderer
+    install_path="$out/libexec/grafana-image-renderer"
+    mkdir -p $install_path
+    cp -R ../../node_modules $install_path
+    cp -R ./!(node_modules) $install_path
+    popd
+
+    mkdir -p $out/bin
+    cat >$out/bin/grafana-image-renderer <<EOF
+    #! ${runtimeShell}
+    ${nodejs}/bin/node $install_path/build/app.js \$@
+    EOF
+    chmod +x $out/bin/grafana-image-renderer
+
+    runHook postDist
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/grafana/grafana-image-renderer";
+    description = "A Grafana backend plugin that handles rendering of panels & dashboards to PNGs using headless browser (Chromium/Chrome)";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ ma27 ];
+    platforms = platforms.linux;
+  };
+}

pkgs/servers/monitoring/grafana-image-renderer/package.json

@@ -0,0 +1,69 @@
+{
+  "name": "renderer",
+  "version": "1.0.0",
+  "author": "Grafana Labs",
+  "license": "Apache-2.0",
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/grafana/grafana-image-renderer.git"
+  },
+  "scripts": {
+    "tslint": "tslint -c tslint.json --project tsconfig.json",
+    "typecheck": "tsc --noEmit",
+    "prettier:check": "prettier --list-different \"**/*.ts\"",
+    "prettier:write": "prettier --list-different \"**/*.ts\" --write",
+    "precommit": "npm run tslint & npm run typecheck",
+    "watch": "tsc-watch --onSuccess \"node build/app.js server --config=dev.json\"",
+    "build": "tsc",
+    "start": "node build/app.js --config=dev.json"
+  },
+  "dependencies": {
+    "@grpc/grpc-js": "^1.0",
+    "@grpc/proto-loader": "^0.5.4",
+    "@hapi/boom": "^9.1.0",
+    "express": "^4.16.3",
+    "express-prom-bundle": "^5.1.5",
+    "google-protobuf": "3.5.0",
+    "lodash": "^4.17.19",
+    "minimist": "^1.2.0",
+    "morgan": "^1.9.0",
+    "mz": "^2.7.0",
+    "prom-client": "^11.5.3",
+    "puppeteer": "^2.0.0",
+    "puppeteer-cluster": "^0.18.0",
+    "unique-filename": "^1.1.0",
+    "winston": "^3.2.1"
+  },
+  "devDependencies": {
+    "@types/express": "^4.11.1",
+    "@types/node": "^10.0.9",
+    "husky": "^3.1.0",
+    "lint-staged": "^9.5.0",
+    "pkg": "4.4.8",
+    "prettier": "^1.19.1",
+    "tsc-watch": "^4.2.3",
+    "tslint": "^6.1.1",
+    "typescript": "^3.8.3"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged && npm run precommit"
+    }
+  },
+  "lint-staged": {
+    "*.ts": [
+      "prettier --write",
+      "git add"
+    ]
+  },
+  "pkg": {
+    "assets": "proto/*"
+  },
+  "bin": "build/app.js",
+  "engines": {
+    "node": ">=12 <13"
+  },
+  "volta": {
+    "node": "12.19.0"
+  }
+}

pkgs/top-level/all-packages.nix

@@ -17108,6 +17108,8 @@ in
 
   grafana_reporter = callPackage ../servers/monitoring/grafana-reporter { };
 
+  grafana-image-renderer = callPackage ../servers/monitoring/grafana-image-renderer { };
+
   gerbera = callPackage ../servers/gerbera {};
 
   gobetween = callPackage ../servers/gobetween { };