Made "to" optional (incase cc or bcc is provided) (#183)

* Added made to optional (incase cc or bcc is provided)

* updated action.yml

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
               <p>Paragraph</p>
               </body>
               </html>
-          - subject: Plain body (Markdown)
+          - subject: file://testdata/subject.txt
             convert_markdown: true
             body: file://README.md
           - subject: HTML body (Markdown)
@@ -42,7 +42,7 @@ jobs:
             html_body: file://README.md
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Send mail
         uses: ./
         with:
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Send mail
         uses: ./
         with:

action.yml

@@ -23,7 +23,7 @@ inputs:
     required: true
   to:
     description: Recipients mail addresses (separated with comma)
-    required: true
+    required: false
   from:
     description: Full name of mail sender (might be with an email address specified in <>)
     required: true

main.js

@@ -5,22 +5,22 @@ const fs = require("fs")
 const showdown = require("showdown")
 const path = require("path")
 
-function getBody(bodyOrFile, convertMarkdown) {
-    let body = bodyOrFile
+function getText(textOrFile, convertMarkdown) {
+    let text = textOrFile
 
-    // Read body from file
-    if (bodyOrFile.startsWith("file://")) {
-        const file = bodyOrFile.replace("file://", "")
-        body = fs.readFileSync(file, "utf8")
+    // Read text from file
+    if (textOrFile.startsWith("file://")) {
+        const file = textOrFile.replace("file://", "")
+        text = fs.readFileSync(file, "utf8")
     }
 
     // Convert Markdown to HTML
     if (convertMarkdown) {
         const converter = new showdown.Converter()
-        body = converter.makeHtml(body)
+        text = converter.makeHtml(text)
     }
 
-    return body
+    return text
 }
 
 function getFrom(from, username) {
@@ -80,7 +80,7 @@ async function main() {
 
         const subject = core.getInput("subject", { required: true })
         const from = core.getInput("from", { required: true })
-        const to = core.getInput("to", { required: true })
+        const to = core.getInput("to", { required: false })
         const body = core.getInput("body", { required: false })
         const htmlBody = core.getInput("html_body", { required: false })
         const cc = core.getInput("cc", { required: false })
@@ -92,14 +92,15 @@ async function main() {
         const ignoreCert = core.getInput("ignore_cert", { required: false })
         const priority = core.getInput("priority", { required: false })
 
+        // if neither to, cc or bcc is provided, throw error
+        if (!to && !cc && !bcc) {
+            throw new Error("At least one of 'to', 'cc' or 'bcc' must be specified")
+        }
+        
         if (!serverAddress) {
             throw new Error("Server address must be specified")
         }
 
-        if (!username || !password) {
-            core.warning("Username and password not specified. You should only do this if you are using a self-hosted runner to access an on-premise mail server.")
-        }
-
         const transport = nodemailer.createTransport({
             host: serverAddress,
             auth: username && password ? {
@@ -116,14 +117,14 @@ async function main() {
         const info = await transport.sendMail({
             from: getFrom(from, username),
             to: to,
-            subject: subject,
+            subject: getText(subject, false),
             cc: cc ? cc : undefined,
             bcc: bcc ? bcc : undefined,
             replyTo: replyTo ? replyTo : undefined,
             inReplyTo: inReplyTo ? inReplyTo : undefined,
             references: inReplyTo ? inReplyTo : undefined,
-            text: body ? getBody(body, false) : undefined,
-            html: htmlBody ? getBody(htmlBody, convertMarkdown) : undefined,
+            text: body ? getText(body, false) : undefined,
+            html: htmlBody ? getText(htmlBody, convertMarkdown) : undefined,
             priority: priority ? priority : undefined,
             attachments: attachments ? (await getAttachments(attachments)) : undefined,
         })

package-lock.json

@@ -7,8 +7,8 @@
       "name": "action-send-mail",
       "dependencies": {
         "@actions/core": "^1.2.7",
-        "@actions/glob": "^0.2.1",
-        "nodemailer": "^6.7.8",
+        "@actions/glob": "^0.4.0",
+        "nodemailer": "^6.9.1",
         "showdown": "^1.9.1"
       }
     },
@@ -22,11 +22,11 @@
       }
     },
     "node_modules/@actions/glob": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/@actions/glob/-/glob-0.2.1.tgz",
-      "integrity": "sha512-OqseGbxR8vVikg6rfdKST21GX3QYGq2Nz7/gX3UxZb2Mw1ujJ2S3U5CsYUvYHwxbYguU+HNhfE3930oo5nprXQ==",
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@actions/glob/-/glob-0.4.0.tgz",
+      "integrity": "sha512-+eKIGFhsFa4EBwaf/GMyzCdWrXWymGXfFmZU3FHQvYS8mPcHtTtZONbkcqqUMzw9mJ/pImEBFET1JNifhqGsAQ==",
       "dependencies": {
-        "@actions/core": "^1.2.6",
+        "@actions/core": "^1.9.1",
         "minimatch": "^3.0.4"
       }
     },
@@ -171,9 +171,9 @@
       }
     },
     "node_modules/nodemailer": {
-      "version": "6.8.0",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.8.0.tgz",
-      "integrity": "sha512-EjYvSmHzekz6VNkNd12aUqAco+bOkRe3Of5jVhltqKhEsjw/y0PYPJfp83+s9Wzh1dspYAkUW/YNQ350NATbSQ==",
+      "version": "6.9.1",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.9.1.tgz",
+      "integrity": "sha512-qHw7dOiU5UKNnQpXktdgQ1d3OFgRAekuvbJLcdG5dnEo/GtcTHRYM7+UfJARdOFU9WUQO8OiIamgWPmiSFHYAA==",
       "engines": {
         "node": ">=6.0.0"
       }
@@ -350,11 +350,11 @@
       }
     },
     "@actions/glob": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/@actions/glob/-/glob-0.2.1.tgz",
-      "integrity": "sha512-OqseGbxR8vVikg6rfdKST21GX3QYGq2Nz7/gX3UxZb2Mw1ujJ2S3U5CsYUvYHwxbYguU+HNhfE3930oo5nprXQ==",
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@actions/glob/-/glob-0.4.0.tgz",
+      "integrity": "sha512-+eKIGFhsFa4EBwaf/GMyzCdWrXWymGXfFmZU3FHQvYS8mPcHtTtZONbkcqqUMzw9mJ/pImEBFET1JNifhqGsAQ==",
       "requires": {
-        "@actions/core": "^1.2.6",
+        "@actions/core": "^1.9.1",
         "minimatch": "^3.0.4"
       }
     },
@@ -472,9 +472,9 @@
       }
     },
     "nodemailer": {
-      "version": "6.8.0",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.8.0.tgz",
-      "integrity": "sha512-EjYvSmHzekz6VNkNd12aUqAco+bOkRe3Of5jVhltqKhEsjw/y0PYPJfp83+s9Wzh1dspYAkUW/YNQ350NATbSQ=="
+      "version": "6.9.1",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.9.1.tgz",
+      "integrity": "sha512-qHw7dOiU5UKNnQpXktdgQ1d3OFgRAekuvbJLcdG5dnEo/GtcTHRYM7+UfJARdOFU9WUQO8OiIamgWPmiSFHYAA=="
     },
     "p-limit": {
       "version": "2.3.0",

package.json

@@ -3,8 +3,8 @@
   "main": "main.js",
   "dependencies": {
     "@actions/core": "^1.2.7",
-    "@actions/glob": "^0.2.1",
-    "nodemailer": "^6.7.8",
+    "@actions/glob": "^0.4.0",
+    "nodemailer": "^6.9.1",
     "showdown": "^1.9.1"
   }
 }

testdata/subject.txt

@@ -0,0 +1 @@
+Plain body (Markdown)