epgstation: add updateScript

nixos/modules/services/video/epgstation/generate

@@ -1,31 +0,0 @@
-#!/usr/bin/env -S nix-build --no-out-link
-
-# Script to generate default streaming configurations for EPGStation. There's
-# no need to run this script directly since generate.sh in the EPGStation
-# package directory would run this script for you.
-#
-# Usage: ./generate | xargs cat > streaming.json
-
-{ pkgs ? (import ../../../../.. {}) }:
-
-let
-  sampleConfigPath = "${pkgs.epgstation.src}/config/config.sample.json";
-  sampleConfig = builtins.fromJSON (builtins.readFile sampleConfigPath);
-  streamingConfig = {
-    inherit (sampleConfig)
-      mpegTsStreaming
-      mpegTsViewer
-      liveHLS
-      liveMP4
-      liveWebM
-      recordedDownloader
-      recordedStreaming
-      recordedViewer
-      recordedHLS;
-  };
-in
-pkgs.runCommand "streaming.json" { nativeBuildInputs = [ pkgs.jq ]; } ''
-  jq . <<<'${builtins.toJSON streamingConfig}' > $out
-''
-
-# vim:set ft=nix:

pkgs/applications/video/epgstation/default.nix

@@ -1,6 +1,27 @@
-{ stdenv, fetchFromGitHub, makeWrapper, bash, nodejs, nodePackages, gzip }:
+{ stdenv
+, fetchFromGitHub
+, common-updater-scripts
+, genericUpdater
+, writers
+, makeWrapper
+, bash
+, nodejs
+, nodePackages
+, gzip
+, jq
+}:
 
 let
+  # NOTE: use updateScript to bump the package version
+  pname = "EPGStation";
+  version = "1.7.4";
+  src = fetchFromGitHub {
+    owner = "l3tnun";
+    repo = "EPGStation";
+    rev = "v${version}";
+    sha256 = "15z1kdbamj97frp3dfnbm0h8krihmv2xdab4id0rxin29ibrw1k2";
+  };
+
   workaround-opencollective-buildfailures = stdenv.mkDerivation {
     # FIXME: This should be removed when a complete fix is available
     # https://github.com/svanderburg/node2nix/issues/145
@@ -12,14 +33,9 @@ let
       chmod +x $out/bin/opencollective-postinstall
     '';
   };
-in
+
-nodePackages.epgstation.override (drv: {
+  pkg = nodePackages.epgstation.override (drv: {
-  src = fetchFromGitHub {
+    inherit src;
-    owner = "l3tnun";
-    repo = "EPGStation";
-    rev = "v${drv.version}"; # version specified in ./generate.sh
-    sha256 = "15z1kdbamj97frp3dfnbm0h8krihmv2xdab4id0rxin29ibrw1k2";
-  };
 
     buildInputs = [ bash ];
     nativeBuildInputs = [
@@ -55,9 +71,9 @@ nodePackages.epgstation.override (drv: {
       rm -rf logs
 
       # Replace the existing configuration and runtime state directories with
-    # symlinks. Without this, they would all be non-writable because they reside
+      # symlinks. Without this, they would all be non-writable because they
-    # in the Nix store. Note that the source path won't be accessible at build
+      # reside in the Nix store. Note that the source path won't be accessible
-    # time.
+      # at build time.
       rm -r config data recorded thumbnail
       ln -sfT /etc/epgstation config
       ln -sfT /var/lib/epgstation data
@@ -71,8 +87,19 @@ nodePackages.epgstation.override (drv: {
       popd
     '';
 
-  meta = with stdenv.lib; drv.meta // {
+    # NOTE: this may take a while since it has to update all packages in
-    maintainers = with maintainers; [ midchildan ];
+    # nixpkgs.nodePackages
+    passthru.updateScript = import ./update.nix {
+      inherit (stdenv) lib;
+      inherit (src.meta) homepage;
+      inherit
+        pname
+        version
+        common-updater-scripts
+        genericUpdater
+        writers
+        jq;
+    };
 
     # nodePackages.epgstation is a stub package to fetch npm dependencies and
     # is marked as broken to prevent users from installing it directly. This
@@ -80,6 +107,16 @@ nodePackages.epgstation.override (drv: {
     # nixpkgs while still allowing us to heavily customize the build. It also
     # allows us to provide devDependencies for the epgstation build process
     # without doing the same for all the other node packages.
-    broken = false;
+    meta = drv.meta // { broken = false; };
+  });
+in
+pkg // {
+  name = "${pname}-${version}";
+
+  meta = with stdenv.lib; pkg.meta // {
+    maintainers = with maintainers; [ midchildan ];
+
+    # NOTE: updateScript relies on this being correct
+    position = toString ./default.nix + ":1";
   };
-})
+}

pkgs/applications/video/epgstation/generate.sh

@@ -1,34 +0,0 @@
-#!/usr/bin/env bash
-
-# Script to generate the Nix package definition for EPGStation. Run this script
-# when bumping the package version.
-
-VERSION="1.7.4"
-URL="https://raw.githubusercontent.com/l3tnun/EPGStation/v$VERSION/package.json"
-JQ_BIN="$(nix-build ../../../.. --no-out-link -A jq)/bin/jq"
-
-set -eu -o pipefail
-cd "$(dirname "${BASH_SOURCE[0]}")"
-
-main() {
-    # update package.json
-    curl -sSfL "$URL" \
-        | jq '. + {"dependencies": (.devDependencies + .dependencies)} | del(.devDependencies)' \
-        > package.json
-
-    # regenerate node packages to update the actual Nix package
-    pushd ../../../development/node-packages \
-        && ./generate.sh
-    popd
-
-    # generate default streaming settings for EPGStation
-    pushd ../../../../nixos/modules/services/video/epgstation \
-        && cat "$(./generate)" > streaming.json
-    popd
-}
-
-jq() {
-    "$JQ_BIN" "$@"
-}
-
-main "@"

pkgs/applications/video/epgstation/update.nix

@@ -0,0 +1,66 @@
+{ pname
+, version
+, homepage
+, lib
+, common-updater-scripts
+, genericUpdater
+, writers
+, jq
+}:
+
+let
+  updater = genericUpdater {
+    inherit pname version;
+    attrPath = lib.toLower pname;
+    rev-prefix = "v";
+    versionLister = "${common-updater-scripts}/bin/list-git-tags ${homepage}";
+  };
+  updateScript = builtins.elemAt updater 0;
+  updateArgs = map (lib.escapeShellArg) (builtins.tail updater);
+in writers.writeBash "update-epgstation" ''
+  set -euxo pipefail
+
+  # bump the version
+  ${updateScript} ${lib.concatStringsSep " " updateArgs}
+
+  cd "${toString ./.}"
+
+  # Get the path to the latest source. Note that we can't just pass the value
+  # of epgstation.src directly because it'd be evaluated before we can run
+  # updateScript.
+  SRC="$(nix-build ../../../.. --no-out-link -A epgstation.src)"
+  if [[ "${version}" == "$(${jq}/bin/jq -r .version "$SRC/package.json")" ]]; then
+    echo "[INFO] Already using the latest version of ${pname}" >&2
+    exit
+  fi
+
+  # Regenerate package.json from the latest source.
+  ${jq}/bin/jq '. + {
+      dependencies: (.dependencies + .devDependencies),
+    } | del(.devDependencies, .main, .scripts)' \
+    "$SRC/package.json" \
+    > package.json
+
+  # Regenerate node packages to update the pre-overriden epgstation derivation.
+  # This must come *after* package.json has been regenerated.
+  pushd ../../../development/node-packages
+  ./generate.sh
+  popd
+
+  # Generate default streaming settings for the nixos module.
+  pushd ../../../../nixos/modules/services/video/epgstation
+  ${jq}/bin/jq '
+    { liveHLS
+    , liveMP4
+    , liveWebM
+    , mpegTsStreaming
+    , mpegTsViewer
+    , recordedDownloader
+    , recordedStreaming
+    , recordedHLS
+    , recordedViewer
+    }' \
+    "$SRC/config/config.sample.json" \
+    > streaming.json
+  popd
+''