Cache npm in CI

.github/workflows/accept-baselines-fix-lints.yaml

@@ -8,14 +8,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
+      with:
+        cache: npm
 
     - name: Configure Git, Run Tests, Update Baselines, Apply Fixes
       run: |
         git config user.email "[email protected]"
         git config user.name "TypeScript Bot"
-        npm install
+        npm ci
         git rm -r --quiet tests/baselines/reference :^tests/baselines/reference/docker :^tests/baselines/reference/user
         gulp runtests-parallel --ci --fix || true
         gulp baseline-accept

.github/workflows/ci.yml

@@ -31,6 +31,20 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         check-latest: true
+    # We use all of this instead of "cache: npm" above to avoid mixing npm 6 caches with npm 8+ caches.
+    # TODO: Remove this once we stop running CI on Node 14.
+    - name: Get npm cache directory
+      id: npm-cache-info
+      run: |
+        echo "::set-output name=dir::$(npm config get cache)"
+        echo "::set-output name=key::$(npm --version | grep -q '^6' && echo "node14" || echo "node")"
+    - uses: actions/cache@v3
+      id: npm-cache
+      with:
+        path: ${{ steps.npm-cache-info.outputs.dir }}
+        key: ${{ runner.os }}-${{ steps.npm-cache-info.outputs.key }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-${{ steps.npm-cache-info.outputs.key }}-
     - run:  npm ci
 
     # Re: https://github.com/actions/setup-node/pull/125

.github/workflows/codeql.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.

.github/workflows/ensure-related-repos-run-crons.yml

@@ -22,7 +22,7 @@ jobs:
         git config --global user.email "[email protected]"
         git config --global user.name "TypeScript Bot"
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with: 
         repository: 'microsoft/TypeScript-Website'
         path: 'ts-site'
@@ -34,7 +34,7 @@ jobs:
         git config --unset-all http.https://github.com/.extraheader
         git push https://${{ secrets.TS_BOT_GITHUB_TOKEN }}@github.com/microsoft/TypeScript-Website.git
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with: 
         repository: 'microsoft/TypeScript-Make-Monaco-Builds'
         path: 'monaco-builds'

.github/workflows/new-release-branch.yaml

@@ -9,10 +9,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/setup-node@v3
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         fetch-depth: 5
+    - uses: actions/setup-node@v3
+      with:
+        cache: npm
     - run: |
         git checkout -b ${{ github.event.client_payload.branch_name }}
         sed -i -e 's/"version": ".*"/"version": "${{ github.event.client_payload.package_version }}"/g' package.json

.github/workflows/nightly.yaml

@@ -14,11 +14,12 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
       with:
         # Use NODE_AUTH_TOKEN environment variable to authenticate to this registry.
         registry-url: https://registry.npmjs.org/
+        cache: npm
     - name: Setup and publish nightly
       run: |
         npm whoami

.github/workflows/release-branch-artifact.yaml

@@ -10,8 +10,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
+      with:
+        cache: npm
     - name: npm install and test
       run: |
         npm ci

.github/workflows/rich-navigation.yml

@@ -15,11 +15,13 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 5
 
       - uses: actions/setup-node@v3
+        with:
+          cache: npm
 
       - name: Install dependencies
         run:  npm ci

.github/workflows/set-version.yaml

@@ -9,8 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/setup-node@v3
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         ref: ${{ github.event.client_payload.branch_name }}
     # notably, this is essentially the same script as `new-release-branch.yaml` (with fewer inputs), but it assumes the branch already exists
@@ -20,6 +19,9 @@ jobs:
     # branch_name - the target branch
     # package_version - the full version string (eg, `3.9.1-rc` or `3.9.2`)
     # core_major_minor - the major.minor pair associated with the desired package_version (eg, `3.9` for `3.9.3`)
+    - uses: actions/setup-node@v3
+      with:
+        cache: npm
     - run: |
         sed -i -e 's/"version": ".*"/"version": "${{ github.event.client_payload.package_version }}"/g' package.json
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' src/compiler/corePublic.ts

.github/workflows/sync-branch.yaml

@@ -14,14 +14,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/setup-node@v3
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         ref: ${{ github.event.inputs.branch_name || github.event.client_payload.branch_name }}
         fetch-depth: 0
     # This does a test post-merge and only pushes the result if the test succeeds
     # required client_payload members:
     # branch_name - the target branch
+    - uses: actions/setup-node@v3
+      with:
+        cache: npm
     - run: |
         git config user.email "[email protected]"
         git config user.name "TypeScript Bot"

.github/workflows/sync-wiki.yml

@@ -9,7 +9,7 @@ jobs:
     - name: Get repo name
       run: R=${GITHUB_REPOSITORY%?wiki}; echo "BASENAME=${R##*/}" >> $GITHUB_ENV
     - name: Checkout ${{ env.BASENAME }}-wiki
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         repository: "${{ GITHUB.repository_owner }}/${{ env.BASENAME }}-wiki"
         token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}

.github/workflows/twoslash-repros.yaml

@@ -24,6 +24,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/setup-node@v3
+      with:
+        cache: npm # TODO(jakebailey): No checkout; remove?
     - uses: microsoft/TypeScript-Twoslash-Repro-Action@master
       with:
         github-token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}
@@ -36,6 +38,8 @@ jobs:
       with:
         fetch-depth: 0
     - uses: actions/setup-node@v3
+      with:
+        cache: npm
     - uses: microsoft/TypeScript-Twoslash-Repro-Action@master
       with:
         github-token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}

.github/workflows/update-lkg.yml

@@ -8,8 +8,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
+      with:
+        cache: npm
 
     - name: Configure Git and Update LKG
       run: |

.github/workflows/update-package-lock.yaml

@@ -13,10 +13,11 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
       with:
         node-version: 16
+        cache: npm
 
     - name: Configure git and update package-lock.json
       run: |