wip: report package sizes

Added as a comment to the current pull request

.forgejo/workflows/check.yml

@@ -1,23 +0,0 @@
-on:
-  push:
-jobs:
-  check:
-    runs-on: nixos
-    steps:
-      - uses: "https://code.forgejo.org/actions/checkout@v4"
-      - run: nix --version
-      - run: nix flake check --keep-going --verbose
-  build:
-    runs-on: nixos
-    strategy:
-      matrix:
-        target:
-          - audiomenu
-          - docs
-          - jpassmenu
-          - nixosConfigurations.vm.config.system.build.toplevel
-          - nvim
-    steps:
-      - uses: "https://code.forgejo.org/actions/checkout@v4"
-      - run: nix --version
-      - run: nix build --print-build-logs '.#${{ matrix.target }}'

.forgejo/workflows/size-report.yml

@@ -0,0 +1,10 @@
+on:
+  pull_request:
+jobs:
+  report-size:
+    runs-on: nixos
+    steps:
+      - uses: "https://git.salame.cl/actions/checkout@v4"
+      - run: nix --version
+      - name: Report Size
+        run: ci-scripts/report-size.sh

.gitignore

@@ -1,4 +1,5 @@
 result
+result-*
 .direnv/
 .pre-commit-config.yaml
 # ignore vm images

ci-scripts/report-size.sh

@@ -0,0 +1,47 @@
+#!/bin/sh
+
+package_size_table() {
+	packages=$(nix flake show --json 2>/dev/null | jq --raw-output '.packages."x86_64-linux" | ".#" + keys[]')
+	# we want to split the words as each of them is a different installable
+	# shellcheck disable=SC2086
+	nix build $packages
+	# shellcheck disable=SC2086
+	table=$(nix path-info --size --closure-size --human-readable \
+		$packages |
+		sed 's/^\(\S\+\)\(\s\+\)\(\S\+\)\(\s\+\)\(\S\+\)$/| \1\2| \3 | \4\5 |/')
+
+	cat <<-EOF
+		| Nix Store Path | NAR Size | Closure Size |
+		|----------------|---------:|-------------:|
+		$table
+	EOF
+}
+
+if [ "$CI" = "true" ]; then
+	pr_number=$(curl -X 'GET' \
+		"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls?state=open&sort=recentupdate" \
+		-H 'accept: application/json' |
+		jq --arg head_ref "$GITHUB_HEAD_REF" '.[] | select(.head.ref == $head_ref) | .number')
+	echo "Retrieved index: $pr_number"
+	echo "Expected PR URL: $GITHUB_SERVER_URL/$GITHUB_REPOSITORY/pulls/$pr_number"
+	echo 'Generating comment body'
+	comment=$(
+		cat <<-EOF
+			### NixOS Configurations sizes
+
+			TODO
+
+			### Package sizes
+
+			$(package_size_table)
+		EOF
+	)
+	echo 'Posting comment:'
+	echo "$comment"
+	curl -o - -v -X 'POST' \
+		"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$pr_number/comments?token=$GITHUB_TOKEN" \
+		-H 'accept: application/json' \
+		-d "$(echo '{}' | jq --arg comment "$comment" '.body=$comment')"
+else
+	package_size_table
+fi