refactor(ci): conditionally run jobs based on file changes (#4242)

* refactor(ci): only run ts jobs on ts changes

This modifies the `style-lint-typescript` and `test-js` jobs to only run
when there are changes in `site`.

* refactor(ci): only run lint-shellcheck on sh changes

* refactor(ci): only run go jobs on go changes

* refactor(ci): only run style-fmt when needed

This adds a new item to `changes` for `**.tf` changes. Now it will only
run `style-fmt` if PR includes changes to `site/**`, `**.tf`, or
`**.ts`.

* refactor(ci): run e2e on go, ts or tf changes

* refactor(ci): run gen on gen changes

* refactor(ci): delete old comments

* fixup: try moving if step inside test-go job

* fixup: try if all steps

* fixup!: refactor(ci): run gen on gen changes

* Revert "refactor(ci): run gen on gen changes"

This reverts commit d0a5ba1c4b.

.github/workflows/coder.yaml

@@ -64,10 +64,12 @@ jobs:
               - '**'
             docs:
               - 'docs/**'
-              # For testing:
-              # - '.github/**'
             sh:
               - "**.sh"
+            go:
+              - "**.go"
+            tf:
+              - "**.tf"
             ts:
               - 'site/**'
             k8s:
@@ -92,6 +94,8 @@ jobs:
     name: style/lint/golangci
     timeout-minutes: 5
     runs-on: ubuntu-latest
+    needs: changes
+    if: needs.changes.outputs.go == 'true'
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v3
@@ -115,6 +119,8 @@ jobs:
     name: style/lint/shellcheck
     timeout-minutes: 5
     runs-on: ubuntu-latest
+    needs: changes
+    if: needs.changes.outputs.sh == 'true'
     steps:
       - uses: actions/checkout@v3
       - name: Run ShellCheck
@@ -128,6 +134,8 @@ jobs:
     name: "style/lint/typescript"
     timeout-minutes: 5
     runs-on: ubuntu-latest
+    needs: changes
+    if: needs.changes.outputs.ts == 'true'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -247,6 +255,8 @@ jobs:
     name: "style/fmt"
     runs-on: ubuntu-latest
     timeout-minutes: 5
+    needs: changes
+    if: needs.changes.outputs.sh == 'true' || needs.changes.outputs.ts == 'true' || needs.changes.outputs.tf == 'true'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -280,6 +290,7 @@ jobs:
     name: "test/go"
     runs-on: ${{ matrix.os }}
     timeout-minutes: 20
+    needs: changes
     strategy:
       matrix:
         os:
@@ -288,30 +299,36 @@ jobs:
           - windows-2022
     steps:
       - uses: actions/checkout@v3
+        if: needs.changes.outputs.go == 'true'
 
       - uses: actions/setup-go@v3
+        if: needs.changes.outputs.go == 'true'
         with:
           go-version: "~1.19"
 
       - name: Echo Go Cache Paths
+        if: needs.changes.outputs.go == 'true'
         id: go-cache-paths
         run: |
           echo "::set-output name=go-build::$(go env GOCACHE)"
           echo "::set-output name=go-mod::$(go env GOMODCACHE)"
 
       - name: Go Build Cache
+        if: needs.changes.outputs.go == 'true'
         uses: actions/cache@v3
         with:
           path: ${{ steps.go-cache-paths.outputs.go-build }}
           key: ${{ runner.os }}-go-build-${{ hashFiles('**/go.**', '**.go') }}
 
       - name: Go Mod Cache
+        if: needs.changes.outputs.go == 'true'
         uses: actions/cache@v3
         with:
           path: ${{ steps.go-cache-paths.outputs.go-mod }}
           key: ${{ runner.os }}-go-mod-${{ hashFiles('**/go.sum') }}
 
       - name: Install gotestsum
+        if: needs.changes.outputs.go == 'true'
         uses: jaxxstorm/action-install-gh-release@v1.7.1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -320,11 +337,13 @@ jobs:
           tag: v1.7.0
 
       - uses: hashicorp/setup-terraform@v2
+        if: needs.changes.outputs.go == 'true'
         with:
           terraform_version: 1.1.9
           terraform_wrapper: false
 
       - name: Test with Mock Database
+        if: needs.changes.outputs.go == 'true'
         id: test
         shell: bash
         run: |
@@ -350,7 +369,7 @@ jobs:
         # that is no guarantee, see:
         # https://github.com/codecov/codecov-action/issues/788
         continue-on-error: true
-        if: steps.test.outputs.cover && github.actor != 'dependabot[bot]' && !github.event.pull_request.head.repo.fork
+        if: steps.test.outputs.cover && github.actor != 'dependabot[bot]' && !github.event.pull_request.head.repo.fork && needs.changes.outputs.go == 'true'
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./gotests.coverage
@@ -364,6 +383,8 @@ jobs:
     # goroutines. Setting this to the timeout +5m should work quite well
     # even if some of the preceding steps are slow.
     timeout-minutes: 25
+    needs: changes
+    if: needs.changes.outputs.go == 'true'
     steps:
       - uses: actions/checkout@v3
 
@@ -518,6 +539,8 @@ jobs:
     name: "test/js"
     runs-on: ubuntu-latest
     timeout-minutes: 20
+    needs: changes
+    if: needs.changes.outputs.ts == 'true'
     steps:
       - uses: actions/checkout@v3
 
@@ -556,9 +579,8 @@ jobs:
 
   test-e2e:
     name: "test/e2e/${{ matrix.os }}"
-    needs:
-      - changes
-    if: needs.changes.outputs.docs-only == 'false'
+    needs: changes
+    if: needs.changes.outputs.go == 'true' || needs.changes.outputs.ts == 'true' || needs.changes.outputs.tf == 'true'
     runs-on: ${{ matrix.os }}
     timeout-minutes: 20
     strategy: