Make publish config optional

.changeset/breezy-garlics-bathe.md

@@ -0,0 +1,5 @@
+---
+"@changesets/action": minor
+---
+
+Make publish config optional

README.md

@@ -6,13 +6,13 @@ This action for [Changesets](https://github.com/atlassian/changesets) creates a
 
 ### Inputs
 
-- publish - The command to use to build and publish packages
-- version - The command to update version, edit CHANGELOG, read and delete changesets. Default to `changeset version` if not provided
-- commit - The commit message to use. Default to `Version Packages`
-- title - The pull request title. Default to `Version Packages`
-- setupGitUser - Sets up the git user for commits as `"github-actions[bot]"`. Default to `true`
-- createGithubReleases - A boolean value to indicate whether to create Github releases after `publish` or not. Default to `true`
-- cwd - Changes node's `process.cwd()` if the project is not located on the root. Default to `process.cwd()`
+- publish - The command to use to build and publish packages. Defaults to `changeset publish`
+- version - The command to update version, edit CHANGELOG, read and delete changesets. Defaults to `changeset version`
+- commit - The commit message to use. Defaults to `Version Packages`
+- title - The pull request title. Defaults to `Version Packages`
+- setupGitUser - Sets up the git user for commits as `"github-actions[bot]"`. Defaults to `true`
+- createGithubReleases - A boolean value to indicate whether to create Github releases after `publish` or not. Defaults to `true`
+- cwd - Changes node's `process.cwd()` if the project is not located on the root. Defaults to `process.cwd()`
 
 ### Outputs
 
@@ -91,7 +91,7 @@ jobs:
         id: changesets
         uses: changesets/action@v1
         with:
-          # This expects you to have a script called release which does a build for your packages and calls changeset publish
+          # You can optionally specify a script called release which does a build of your packages and calls changeset publish
           publish: yarn release
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

src/index.ts

@@ -35,22 +35,18 @@ const getOptionalInput = (name: string) => core.getInput(name) || undefined;
 
   let { changesets } = await readChangesetState();
 
-  let publishScript = core.getInput("publish");
+  let publishScript = core.getInput("publish") || 'changeset publish';
   let hasChangesets = changesets.length !== 0;
   const hasNonEmptyChangesets = changesets.some(
     (changeset) => changeset.releases.length > 0
   );
-  let hasPublishScript = !!publishScript;
 
   core.setOutput("published", "false");
   core.setOutput("publishedPackages", "[]");
   core.setOutput("hasChangesets", String(hasChangesets));
 
   switch (true) {
-    case !hasChangesets && !hasPublishScript:
-      core.info("No changesets found");
-      return;
-    case !hasChangesets && hasPublishScript: {
+    case !hasChangesets: {
       core.info(
         "No changesets found, attempting to publish any unpublished packages to npm"
       );
@@ -108,7 +104,6 @@ const getOptionalInput = (name: string) => core.getInput(name) || undefined;
         githubToken,
         prTitle: getOptionalInput("title"),
         commitMessage: getOptionalInput("commit"),
-        hasPublishScript,
         branch: getOptionalInput("branch"),
       });
 

src/run.ts

@@ -223,7 +223,6 @@ const requireChangesetsCliPkgJson = (cwd: string) => {
 };
 
 type GetMessageOptions = {
-  hasPublishScript: boolean;
   branch: string;
   changedPackagesInfo: {
     highestLevel: number;
@@ -235,19 +234,13 @@ type GetMessageOptions = {
   preState?: PreState;
 };
 
-export async function getVersionPrBody({
-  hasPublishScript,
+async function getVersionPrBody({
   preState,
   changedPackagesInfo,
   prBodyMaxCharacters,
   branch,
 }: GetMessageOptions) {
-  let messageHeader = `This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and ${
-    hasPublishScript
-      ? `the packages will be published to npm automatically`
-      : `publish to npm yourself or [setup this action to publish automatically](https://github.com/changesets/action#with-publishing)`
-  }. If you're not ready to do a release yet, that's fine, whenever you add more changesets to ${branch}, this PR will be updated.
-`;
+  let messageHeader = `This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to ${branch}, this PR will be updated.`;
   let messagePrestate = !!preState
     ? `⚠️⚠️⚠️⚠️⚠️⚠️