style: update formatting for go code and add CI check

.ci/magician/cmd/scheduled_pr_reminders_test.go

@@ -805,7 +805,7 @@ func TestFormatReminderComment(t *testing.T) {
 					&github.User{Login: github.String("other-reviewer")},
 				},
 			},
-			state: waitingForMerge,
+			state:     waitingForMerge,
 			sinceDays: 5,
 			expectedStrings: []string{
 				"waiting for merge for 1 week",

.ci/magician/cmd/templates_test.go

@@ -24,16 +24,16 @@ func TestColor(t *testing.T) {
 			want:  "🟡 Test text",
 		},
 		{
-			name: "green",
+			name:  "green",
 			color: "green",
-			text: "Test text",
-			want: "🟢 Test text",
+			text:  "Test text",
+			want:  "🟢 Test text",
 		},
 		{
-			name: "unsupported color",
+			name:  "unsupported color",
 			color: "mauve",
-			text: "Test text",
-			want: "Test text",
+			text:  "Test text",
+			want:  "Test text",
 		},
 		{
 			name: "empty color",

.ci/magician/cmd/test_tgc_test.go

@@ -28,7 +28,7 @@ func TestExecTestTGC(t *testing.T) {
 	execTestTGC("sha1", "pr1", gh)
 
 	method := "CreateWorkflowDispatchEvent"
-	expected := [][]any{{"test-tgc.yml", map[string]any{"tpgb-branch": "auto-pr-pr1", "tgc-branch": "auto-pr-pr1", "pr-number":"pr1", "owner": "modular-magician", "repo": "terraform-google-conversion", "sha": "sha1"}}}
+	expected := [][]any{{"test-tgc.yml", map[string]any{"tpgb-branch": "auto-pr-pr1", "tgc-branch": "auto-pr-pr1", "pr-number": "pr1", "owner": "modular-magician", "repo": "terraform-google-conversion", "sha": "sha1"}}}
 	if calls, ok := gh.calledMethods[method]; !ok {
 		t.Fatal("Workflow dispatch event not created")
 	} else if !reflect.DeepEqual(calls, expected) {

.ci/magician/cmd/test_tpg.go

@@ -17,9 +17,9 @@ package cmd
 
 import (
 	"fmt"
+	"github.com/spf13/cobra"
 	"magician/github"
 	"os"
-	"github.com/spf13/cobra"
 )
 
 type ttGithub interface {
@@ -73,7 +73,7 @@ func execTestTPG(version, commit, pr string, gh ttGithub) error {
 
 	commitShaOrBranchUpstream := string(content)
 
-	if commitShaOrBranchUpstream == ""{
+	if commitShaOrBranchUpstream == "" {
 		// fall back to branch if commit SHA can't be found
 		commitShaOrBranchUpstream = "auto-pr-" + pr
 	}

.github/workflows/gofmt.yml

@@ -0,0 +1,41 @@
+name: gofmt
+
+permissions:
+  contents: read
+
+on:
+  pull_request:
+    paths:
+      - "**/*.go"
+
+jobs:
+  run_gofmt:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+        with:
+          fetch-depth: 0
+      - name: Merge base branch
+        id: pull_request
+        run: |
+          git config user.name "modular-magician"
+          git config user.email "magic-modules@google.com"
+          git fetch origin ${{ github.base_ref }} # Fetch the base branch
+          git merge --no-ff origin/${{ github.base_ref }} # Merge with the base branch
+      - name: Set up Go
+        uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
+        with:
+          cache: false
+          go-version: '^1.21'
+      - name: gofmt
+        run: |
+          GOFMT_OUTPUT="$(gofmt -l .)"
+          # Currently no simple way to get a non-0 exit code directly from
+          # gofmt
+          if [ -n "$GOFMT_OUTPUT" ]; then 
+            echo "The following files are not formatted properly:" >&2
+            echo "$GOFMT_OUTPUT" >&2
+            exit 1
+          fi
+          echo "gofmt-output=gofmt success" >> "$GITHUB_OUTPUT"

tools/diff-processor/breaking_changes/resource_config_diff.go

@@ -10,7 +10,7 @@ import (
 // structure for rules regarding resource config changes
 type ResourceConfigDiffRule struct {
 	Identifier string
-	Messages func(resource string, resourceConfigDiff diff.ResourceConfigDiff) []string
+	Messages   func(resource string, resourceConfigDiff diff.ResourceConfigDiff) []string
 }
 
 // ResourceConfigDiffRules is a list of ResourceConfigDiffRule

tools/diff-processor/breaking_changes/resource_config_diff_test.go

@@ -44,4 +44,4 @@ var resourceConfigRemovingAResourceTestCases = []resourceInventoryTestCase{
 		new:            nil,
 		wantViolations: true,
 	},
-}
+}

tools/diff-processor/cmd/breaking_changes.go

@@ -10,8 +10,8 @@ import (
 	"os"
 	"sort"
 
-	"github.com/GoogleCloudPlatform/magic-modules/tools/diff-processor/diff"
 	"github.com/GoogleCloudPlatform/magic-modules/tools/diff-processor/breaking_changes"
+	"github.com/GoogleCloudPlatform/magic-modules/tools/diff-processor/diff"
 	"github.com/spf13/cobra"
 )
 

tools/diff-processor/cmd/breaking_changes_test.go

@@ -5,8 +5,8 @@ import (
 	"encoding/json"
 	"testing"
 
-	"github.com/GoogleCloudPlatform/magic-modules/tools/diff-processor/diff"
 	"github.com/GoogleCloudPlatform/magic-modules/tools/diff-processor/breaking_changes"
+	"github.com/GoogleCloudPlatform/magic-modules/tools/diff-processor/diff"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )

tpgtools/property_helpers.go

@@ -1,11 +1,11 @@
 // Copyright 2021 Google LLC. All Rights Reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
-// 
+//
 //     http://www.apache.org/licenses/LICENSE-2.0
-// 
+//
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

tpgtools/serializable/serializable.go

@@ -1,11 +1,11 @@
 // Copyright 2021 Google LLC. All Rights Reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
-// 
+//
 //     http://www.apache.org/licenses/LICENSE-2.0
-// 
+//
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

tpgtools/serializable/serializable_test.go

@@ -1,11 +1,11 @@
 // Copyright 2021 Google LLC. All Rights Reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
-// 
+//
 //     http://www.apache.org/licenses/LICENSE-2.0
-// 
+//
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -18,7 +18,7 @@ import (
 	"testing"
 )
 
-func TestListOfResources(t *testing.T) {	
+func TestListOfResources(t *testing.T) {
 	services, err := ListOfResources("test_specs")
 	if err != nil {
 		t.Errorf("received error: %v", err)

tpgtools/serialization_helpers.go

@@ -7,8 +7,8 @@ import (
 	"strings"
 
 	cloudresourcemanager "github.com/GoogleCloudPlatform/declarative-resource-client-library/services/google/cloudresourcemanager"
-	cloudresourcemanagerBeta "github.com/GoogleCloudPlatform/declarative-resource-client-library/services/google/cloudresourcemanager/beta"
 	cloudresourcemanagerAlpha "github.com/GoogleCloudPlatform/declarative-resource-client-library/services/google/cloudresourcemanager/alpha"
+	cloudresourcemanagerBeta "github.com/GoogleCloudPlatform/declarative-resource-client-library/services/google/cloudresourcemanager/beta"
 )
 
 func serializeAlphaProjectToHCL(r cloudresourcemanagerAlpha.Project, hasGAEquivalent bool) (string, error) {

tpgtools/type.go

@@ -1,11 +1,11 @@
 // Copyright 2021 Google LLC. All Rights Reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
-// 
+//
 //     http://www.apache.org/licenses/LICENSE-2.0
-// 
+//
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.