CI: Try to add a GitHub workflow

.github/workflows/ci.yaml

@@ -0,0 +1,51 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+    paths:
+      - 'etc/ci/*'
+      - 'src/*.toml'
+  push:
+    branches:
+      - master
+    paths:
+      - 'etc/ci/*'
+      - 'src/*.toml'
+
+jobs:
+  build:
+    name: Build ${{ matrix.fontname }} Font
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        fontname:
+          - Iosevkins
+          - IosevkinsMichi
+
+    steps:
+      - uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+
+      - name: Install Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends ttfautohint
+
+      - uses: actions/checkout@v4
+
+      - name: Fetch Submodules
+        run:  git submodule update --init --recursive --depth 1
+
+      - name: Configure
+        run:  etc/ci/configure
+
+      - name: Build
+        run:  etc/ci/build ${{ matrix.fontname }}
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.fontname }}
+          path: lib/iosevka/dist/*

.gitignore

@@ -5,4 +5,7 @@
 !/LICENSE
 !/README.md
 
+!/.github/workflows/*.yaml
+!/etc/ci/*
+
 !*.toml

etc/ci/build

@@ -0,0 +1,5 @@
+#!/bin/sh -efu
+cd lib/iosevka
+for font in "$@"; do
+	npm run build -- "ttf::$font" "ttf-unhinted::$font"
+done

etc/ci/configure

@@ -0,0 +1,4 @@
+#!/bin/sh -eu
+cat src/*.toml > lib/iosevka/private-build-plans.toml
+cd lib/iosevka
+npm install