Add merge_method option

README.md

@@ -22,6 +22,7 @@ The following provider block variables are available for configuration:
 - `email` Email to use in commits - this must match the email in your GPG key if you are signing commits (read from env var `$GITHUB_EMAIL`)
 - `gpg_secret_key` The private GPG key to use to sign commits (optional) (read from env var `$GPG_SECRET_KEY`)
 - `gpg_passphrase` The passphrase associated with the aforementioned GPG key (optional) (read from env var `$GPG_PASSPHRASE`)
+- `merge_method` Pull request merge method, default to `merge` available (`merge`, `squash`, `rebase`) (read from env var `$GITHUB_MERGE_METHOD`)
 
 ### Authentication
 
@@ -72,6 +73,6 @@ The above would result in the following content being committed to `.github/CODE
 
 ```
 # automatically generated by terraform - please do not edit here
-* @expert 
+* @expert
 *.java @java-expert @my-org/experts
 ```

codeowners/provider.go

@@ -53,6 +53,13 @@ func Provider() *schema.Provider {
 				DefaultFunc: schema.EnvDefaultFunc("GITHUB_USERNAME", nil),
 				Sensitive:   true,
 			},
+			"merge_method": {
+				Type:        schema.TypeString,
+				Required:    true,
+				Description: "PullRequest merge method. Default: merge, available: merge, squash, rebase",
+				DefaultFunc: schema.EnvDefaultFunc("GITHUB_MERGE_METHOD", nil),
+				Sensitive:   true,
+			},
 		},
 		ResourcesMap: map[string]*schema.Resource{
 			"codeowners_file": resourceFile(),
@@ -68,6 +75,19 @@ type providerConfiguration struct {
 	ghEmail             string
 	gpgKey              string
 	gpgPassphrase       string
+	mergeMethod         string
+}
+
+func mergeMethod(mm string) string {
+	mergeMethods := []string{"merge", "squash", "rebase"}
+
+	for _, v := range mergeMethods {
+		if mm == v {
+			return mm
+		}
+	}
+
+	return "merge"
 }
 
 func providerConfigure(d *schema.ResourceData) (interface{}, error) {
@@ -85,5 +105,6 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 		ghUsername:          d.Get("username").(string),
 		gpgKey:              d.Get("gpg_secret_key").(string),
 		gpgPassphrase:       d.Get("gpg_passphrase").(string),
+		mergeMethod:         mergeMethod(d.Get("merge_method").(string)),
 	}, nil
 }

codeowners/provider_test.go

@@ -32,6 +32,12 @@ func testAccPreCheck(t *testing.T) {
 	}
 }
 
+func TestDefaultMergeMethod(t *testing.T) {
+	if mergeMethod("wat?") != "merge" {
+		t.Fatal("Unexpected default value for mergeMethod")
+	}
+}
+
 func init() {
 	testAccProvider = Provider()
 	testAccProviders = map[string]terraform.ResourceProvider{

codeowners/resource_file.go

@@ -3,12 +3,12 @@ package codeowners
 import (
 	"context"
 	"fmt"
-	"github.com/form3tech-oss/go-github-utils/pkg/branch"
 	"net/http"
 	"sort"
 	"strings"
 	"time"
 
+	"github.com/form3tech-oss/go-github-utils/pkg/branch"
 	githubcommitutils "github.com/form3tech-oss/go-github-utils/pkg/commit"
 	githubfileutils "github.com/form3tech-oss/go-github-utils/pkg/file"
 	"github.com/google/go-github/v28/github"
@@ -114,7 +114,7 @@ func resourceFileRead(d *schema.ResourceData, m interface{}) error {
 }
 
 func resourceFileCreate(d *schema.ResourceData, m interface{}) error {
-	return resourceFileCreateOrUpdate("Adding CODEOWNERS file", d, m )
+	return resourceFileCreateOrUpdate("Adding CODEOWNERS file", d, m)
 }
 
 func resourceFileCreateOrUpdate(s string, d *schema.ResourceData, m interface{}) error {
@@ -154,16 +154,16 @@ func resourceFileCreateOrUpdate(s string, d *schema.ResourceData, m interface{})
 		RetryBackoff:                5 * time.Second,
 		PullRequestSourceBranchName: fmt.Sprintf("terraform-provider-codeowners-%d", time.Now().UnixNano()),
 		PullRequestBody:             "",
+		MergeMethod:                 config.mergeMethod,
 	}); err != nil {
 		return err
 	}
 
 	return resourceFileRead(d, m)
 }
 
-
 func resourceFileUpdate(d *schema.ResourceData, m interface{}) error {
-	return resourceFileCreateOrUpdate("Updating CODEOWNERS file", d, m )
+	return resourceFileCreateOrUpdate("Updating CODEOWNERS file", d, m)
 }
 
 func resourceFileDelete(d *schema.ResourceData, m interface{}) error {
@@ -215,6 +215,7 @@ func resourceFileDelete(d *schema.ResourceData, m interface{}) error {
 		RetryBackoff:                5 * time.Second,
 		PullRequestSourceBranchName: fmt.Sprintf("terraform-provider-codeowners-%d", time.Now().UnixNano()),
 		PullRequestBody:             "",
+		MergeMethod:                 config.mergeMethod,
 	}); err != nil {
 		return err
 	}