From edf4e605e5a4bff79d12028708b78eb7c19529e6 Mon Sep 17 00:00:00 2001
From: Lars Strojny <lars@strojny.net>
Date: Mon, 14 Nov 2022 02:43:27 +0100
Subject: [PATCH] Cache expensive CI steps (#21)

Speed-up pipeline by caching eslint, prettier, TypeScript, node_modules
---
 .github/workflows/build.yml | 53 +++++++++++++++++++++++++++++++++++++
 package.json                |  2 +-
 tsconfig.json               |  4 ++-
 3 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a8d70e1..bbe3252 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,8 +31,61 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
 
+      - name: Cache node modules
+        id: cache-npm
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-node-modules
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json,**/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: Cache eslint
+        id: cache-eslint
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-eslint
+        with:
+          path: .eslintcache
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json,**/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: Cache TypeScript
+        id: cache-typescript
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-typescript
+        with:
+          path: .tsbuildinfo
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json,**/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: Cache prettier
+        id: cache-prettier
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-prettier
+        with:
+          path: node_modules/.cache/prettier/.prettier-cache
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json,**/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
       - name: Install dependencies
         run: npm install
+        if: ${{ steps.cache-npm.outputs.cache-hit != 'true' }}
 
       - name: Lint the project
         run: npm run lint
diff --git a/package.json b/package.json
index 6b83298..61532f2 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     },
     "main": "dist/src/index.js",
     "scripts": {
-        "lint": "ifNotCi() { test \"$CI\" && echo \"$2\" || echo \"$1\"; }; `npm bin`/tsc --noEmit && `npm bin`/prettier --ignore-path=.gitignore `ifNotCi --write --check` '**/**.{ts,js,json}' && `npm bin`/eslint `ifNotCi --fix` --ignore-path=.gitignore '**/**.{ts,js,json}'",
+        "lint": "ifNotCi() { test \"$CI\" && echo \"$2\" || echo \"$1\"; }; `npm bin`/tsc --noEmit && `npm bin`/prettier --ignore-path=.gitignore `ifNotCi --write \"--check --cache --cache-strategy content\"` '**/**.{ts,js,json}' && `npm bin`/eslint `ifNotCi --fix \"--cache --cache-strategy content\"` --ignore-path=.gitignore '**/**.{ts,js,json}'",
         "start": "npm run build && npm run link && nodemon",
         "test": "ifNotCi() { test \"$CI\" && echo \"$2\" || echo \"$1\"; }; npm run code-generation && `npm bin`/jest `ifNotCi --watchAll`",
         "link": "npm install --no-save file:///$PWD/",
diff --git a/tsconfig.json b/tsconfig.json
index 85653a1..e72bbd6 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -12,7 +12,9 @@
         "esModuleInterop": true,
         "importsNotUsedAsValues": "error",
         "noImplicitAny": true,
-        "resolveJsonModule": true
+        "resolveJsonModule": true,
+        "tsBuildInfoFile": ".tsbuildinfo",
+        "incremental": true
     },
     "include": ["src/", "tests/"],
     "exclude": []