Add option for using a file as input for the issue body (#140)

* Add option for using a file as input for the issue body

* Revert irrelevant version bumps

action.yaml

@@ -19,6 +19,9 @@ inputs:
   issue-body:
     description: The custom body for the issue
     required: false
+  issue-body-file-path:
+    description: The file path to a custom body for the issue
+    required: false
   exclude-workflow-initiator-as-approver:
     description: Whether or not to filter out the user who initiated the workflow as an approver if they are in the approvers list
     required: false

constants.go

@@ -18,6 +18,7 @@ const (
 	envVarMinimumApprovals                   string = "INPUT_MINIMUM-APPROVALS"
 	envVarIssueTitle                         string = "INPUT_ISSUE-TITLE"
 	envVarIssueBody                          string = "INPUT_ISSUE-BODY"
+	envVarIssueBodyFilePath                  string = "INPUT_ISSUE-BODY-FILE-PATH"
 	envVarExcludeWorkflowInitiatorAsApprover string = "INPUT_EXCLUDE-WORKFLOW-INITIATOR-AS-APPROVER"
 	envVarAdditionalApprovedWords            string = "INPUT_ADDITIONAL-APPROVED-WORDS"
 	envVarAdditionalDeniedWords              string = "INPUT_ADDITIONAL-DENIED-WORDS"

main.go

@@ -199,7 +199,17 @@ func main() {
 	}
 
 	issueTitle := os.Getenv(envVarIssueTitle)
-	issueBody := os.Getenv(envVarIssueBody)
+	var issueBody string
+	if os.Getenv(envVarIssueBodyFilePath) != "" {
+		fileContents, err := os.ReadFile(os.Getenv(envVarIssueBodyFilePath))
+		if err != nil {
+			fmt.Printf("error reading issue body file: %v\n", err)
+			os.Exit(1)
+		}
+		issueBody = string(fileContents)
+	} else {
+		issueBody = os.Getenv(envVarIssueBody)
+	}
 	minimumApprovalsRaw := os.Getenv(envVarMinimumApprovals)
 	minimumApprovals := 0
 	if minimumApprovalsRaw != "" {