Add Optional skipNpmrc input

.changeset/tricky-impalas-protect.md

@@ -0,0 +1,6 @@
+---
+"@changesets/action": minor
+---
+
+Added option to ignore creation or modification of `.npmrc` file.
+This resolves issues where the correctly configured `.npmrc` file does not match the assumptions made by the action, such as when authenticating to Azure DevOps Artifact Feeds.

README.md

@@ -12,6 +12,7 @@ This action for [Changesets](https://github.com/atlassian/changesets) creates a
 - title - The pull request title. Default to `Version Packages`
 - setupGitUser - Sets up the git user for commits as `"github-actions[bot]"`. Default to `true`
 - cwd - Changes node's `process.cwd()` if the project is not located on the root. Default to `process.cwd()`
+- skipNpmrc - Skips the creation or update of the `.npmrc` file. Only set to `true` if registry authentication is already handled. Defaults to `false`.
 
 ### Outputs
 

action.yml

@@ -28,6 +28,10 @@ inputs:
     description: "A boolean value to indicate whether to create Github releases after `publish` or not"
     required: false
     default: true
+  skipNpmrc:
+    description: "A boolean value to indicate whether to skip the `npmrc` file creation/modification or not"
+    required: false
+    default: false
 outputs:
   published:
     description: A boolean value to indicate whether a publishing is happened or not

src/index.ts

@@ -52,33 +52,8 @@ const getOptionalInput = (name: string) => core.getInput(name) || undefined;
         "No changesets found, attempting to publish any unpublished packages to npm"
       );
 
-      let userNpmrcPath = `${process.env.HOME}/.npmrc`;
-      if (fs.existsSync(userNpmrcPath)) {
-        console.log("Found existing user .npmrc file");
-        const userNpmrcContent = await fs.readFile(userNpmrcPath, "utf8");
-        const authLine = userNpmrcContent.split("\n").find((line) => {
-          // check based on https://github.com/npm/cli/blob/8f8f71e4dd5ee66b3b17888faad5a7bf6c657eed/test/lib/adduser.js#L103-L105
-          return /^\s*\/\/registry\.npmjs\.org\/:[_-]authToken=/i.test(line);
-        });
-        if (authLine) {
-          console.log(
-            "Found existing auth token for the npm registry in the user .npmrc file"
-          );
-        } else {
-          console.log(
-            "Didn't find existing auth token for the npm registry in the user .npmrc file, creating one"
-          );
-          fs.appendFileSync(
-            userNpmrcPath,
-            `\n//registry.npmjs.org/:_authToken=${process.env.NPM_TOKEN}\n`
-          );
-        }
-      } else {
-        console.log("No user .npmrc file found, creating one");
-        fs.writeFileSync(
-          userNpmrcPath,
-          `//registry.npmjs.org/:_authToken=${process.env.NPM_TOKEN}\n`
-        );
+      if (!core.getBooleanInput("skipNpmrc")) {
+        await createOrUpdateNpmrc();
       }
 
       const result = await runPublish({
@@ -113,3 +88,35 @@ const getOptionalInput = (name: string) => core.getInput(name) || undefined;
   console.error(err);
   core.setFailed(err.message);
 });
+
+
+async function createOrUpdateNpmrc() {
+  let userNpmrcPath = `${process.env.HOME}/.npmrc`;
+  if (fs.existsSync(userNpmrcPath)) {
+    console.log("Found existing user .npmrc file");
+    const userNpmrcContent = await fs.readFile(userNpmrcPath, "utf8");
+    const authLine = userNpmrcContent.split("\n").find((line) => {
+      // check based on https://github.com/npm/cli/blob/8f8f71e4dd5ee66b3b17888faad5a7bf6c657eed/test/lib/adduser.js#L103-L105
+      return /^\s*\/\/registry\.npmjs\.org\/:[_-]authToken=/i.test(line);
+    });
+    if (authLine) {
+      console.log(
+        "Found existing auth token for the npm registry in the user .npmrc file"
+      );
+    } else {
+      console.log(
+        "Didn't find existing auth token for the npm registry in the user .npmrc file, creating one"
+      );
+      fs.appendFileSync(
+        userNpmrcPath,
+        `\n//registry.npmjs.org/:_authToken=${process.env.NPM_TOKEN}\n`
+      );
+    }
+  } else {
+    console.log("No user .npmrc file found, creating one");
+    fs.writeFileSync(
+      userNpmrcPath,
+      `//registry.npmjs.org/:_authToken=${process.env.NPM_TOKEN}\n`
+    );
+  }
+}