feat: add an input to run at a subdirectory of the repo root

.changeset/dry-spoons-own.md

@@ -0,0 +1,5 @@
+---
+"changesets-gitlab": minor
+---
+
+feat: add an input to run at a subdirectory of the repo root

README.md

@@ -32,6 +32,7 @@ GitLab CI cli for [changesets](https://github.com/atlassian/changesets) like its
 - `INPUT_TARGET_BRANCH` -> The merge request target branch. Defaults to current branch
 - `INPUT_CREATE_GITLAB_RELEASES` - A boolean value to indicate whether to create Gitlab releases after publish or not. Default true.
 - `INPUT_LABELS` - A comma separated string of labels to be added to the version package Gitlab Merge request
+- `INPUT_CWD` - A relative path from the repo root to the directory containing `package.json` and `.changeset/`. Use this when your npm/yarn workspace lives in a subdirectory of the git repo. Defaults to the repo root.
 
 ### Outputs
 

src/comment.ts

@@ -1,3 +1,5 @@
+import path from 'node:path'
+
 import { ValidationError } from '@changesets/errors'
 import type {
   ComprehensiveRelease,
@@ -21,7 +23,12 @@ import * as context from './context.js'
 import { env } from './env.js'
 import { getChangedPackages } from './get-changed-packages.js'
 import type { LooseString } from './types.js'
-import { getUsername, HTTP_STATUS_NOT_FOUND, TRUTHY_VALUES } from './utils.js'
+import {
+  getUsername,
+  HTTP_STATUS_NOT_FOUND,
+  getCwdInput,
+  TRUTHY_VALUES,
+} from './utils.js'
 
 const generatedByBotNote = 'Generated By Changesets GitLab Bot'
 
@@ -220,13 +227,15 @@ async function getNoteInfo(
 
 const hasChangesetBeenAdded = async (
   changedFilesPromise: Promise<CommitDiffSchema[] | MergeRequestDiffSchema[]>,
+  changesetPrefix: string,
 ) => {
   const changedFiles = await changedFilesPromise
   return changedFiles.some(file => {
     return (
       file.new_file &&
-      /^\.changeset\/.+\.md$/.test(file.new_path) &&
-      file.new_path !== '.changeset/README.md'
+      file.new_path.startsWith(changesetPrefix + '/') &&
+      file.new_path.endsWith('.md') &&
+      file.new_path !== changesetPrefix + '/README.md'
     )
   })
 }
@@ -249,6 +258,10 @@ export const comment = async () => {
     return
   }
 
+  const cwdRel = getCwdInput()
+  const changesetPrefix = cwdRel ? `${cwdRel}/.changeset` : '.changeset'
+  const absoluteCwd = path.resolve(process.cwd(), cwdRel || '.')
+
   const api = createApi()
 
   let errFromFetchingChangedFiles = ''
@@ -273,15 +286,25 @@ export const comment = async () => {
       return changes
     })
 
+    const subdirPrefix = cwdRel ? `${cwdRel}/` : ''
+    const packageChangedFiles = changedFilesPromise.then(changedFiles =>
+      changedFiles
+        .filter(
+          ({ new_path }) => !subdirPrefix || new_path.startsWith(subdirPrefix),
+        )
+        .map(({ new_path }) =>
+          subdirPrefix ? new_path.slice(subdirPrefix.length) : new_path,
+        ),
+    )
+
     const [noteInfo, hasChangeset, { changedPackages, releasePlan }] =
       await Promise.all([
         getNoteInfo(api, mrIid, commentType),
-        hasChangesetBeenAdded(changedFilesPromise),
+        hasChangesetBeenAdded(changedFilesPromise, changesetPrefix),
         getChangedPackages({
-          changedFiles: changedFilesPromise.then(changedFiles =>
-            changedFiles.map(({ new_path }) => new_path),
-          ),
+          changedFiles: packageChangedFiles,
           api,
+          cwd: absoluteCwd,
         }).catch((err: unknown) => {
           if (err instanceof ValidationError) {
             errFromFetchingChangedFiles = `<details><summary>💥 An error occurred when fetching the changed packages and changesets in this MR</summary>\n\n\`\`\`\n${err.message}\n\`\`\`\n\n</details>\n`
@@ -295,7 +318,7 @@ export const comment = async () => {
         }),
       ] as const)
 
-    const newChangesetFileName = `.changeset/${humanId({
+    const newChangesetFileName = `${changesetPrefix}/${humanId({
       separator: '-',
       capitalize: false,
     })}.md`

src/get-changed-packages.ts

@@ -23,9 +23,11 @@ function fetchFile(path: string) {
 
 export const getChangedPackages = async ({
   changedFiles: changedFilesPromise,
+  cwd = process.cwd(),
 }: {
   changedFiles: Promise<string[]> | string[]
   api: Gitlab
+  cwd?: string
   // eslint-disable-next-line sonarjs/cognitive-complexity
 }) => {
   let hasErrored = false
@@ -53,7 +55,7 @@ export const getChangedPackages = async ({
 
   async function getPackage(pkgPath: string) {
     const jsonContent = await fetchJsonFile<PackageJSON>(
-      pkgPath + '/package.json',
+      nodePath.join(cwd, pkgPath, 'package.json'),
     )
     return {
       packageJson: jsonContent,
@@ -72,10 +74,12 @@ export const getChangedPackages = async ({
         workspaces?: string[]
       }
     }
-  >('package.json')
-  const configPromise = fetchJsonFile<WrittenConfig>('.changeset/config.json')
+  >(nodePath.join(cwd, 'package.json'))
+  const configPromise = fetchJsonFile<WrittenConfig>(
+    nodePath.join(cwd, '.changeset/config.json'),
+  )
 
-  const tree = await getAllFiles(process.cwd())
+  const tree = await getAllFiles(cwd)
 
   let preStatePromise: Promise<PreState> | undefined
   const changesetPromises: Array<Promise<NewChangeset>> = []
@@ -90,7 +94,7 @@ export const getChangedPackages = async ({
     } else if (item === 'pnpm-workspace.yaml') {
       isPnpm = true
     } else if (item === '.changeset/pre.json') {
-      preStatePromise = fetchJsonFile('.changeset/pre.json')
+      preStatePromise = fetchJsonFile(nodePath.join(cwd, '.changeset/pre.json'))
     } else if (
       item !== '.changeset/README.md' &&
       item.startsWith('.changeset') &&
@@ -103,7 +107,7 @@ export const getChangedPackages = async ({
       }
       const id = res[1]
       changesetPromises.push(
-        fetchTextFile(item).then(text => ({
+        fetchTextFile(nodePath.join(cwd, item)).then(text => ({
           ...parseChangeset(text),
           id,
         })),
@@ -116,7 +120,9 @@ export const getChangedPackages = async ({
     tool = {
       tool: 'pnpm',
       globs: (
-        parse(await fetchTextFile('pnpm-workspace.yaml')) as {
+        parse(
+          await fetchTextFile(nodePath.join(cwd, 'pnpm-workspace.yaml')),
+        ) as {
           packages: string[]
         }
       ).packages,

src/main.ts

@@ -1,4 +1,5 @@
 import fs from 'node:fs'
+import path from 'node:path'
 import { URL } from 'node:url'
 
 import { getInput, setFailed, setOutput, exportVariable } from '@actions/core'
@@ -15,6 +16,7 @@ import {
   FALSY_VALUES,
   getOptionalInput,
   getUsername,
+  getCwdInput,
   TRUTHY_VALUES,
 } from './utils.js'
 
@@ -50,7 +52,9 @@ export const main = async ({
     )
   }
 
-  const { changesets } = await readChangesetState()
+  const cwd = path.resolve(process.cwd(), getCwdInput() || '.')
+
+  const { changesets } = await readChangesetState(cwd)
 
   const publishScript = getInput('publish')
   const hasChangesets = changesets.length > 0
@@ -88,6 +92,7 @@ export const main = async ({
         createGitlabReleases: !FALSY_VALUES.has(
           getInput('create_gitlab_releases'),
         ),
+        cwd,
       })
 
       if (result.published) {
@@ -110,6 +115,7 @@ export const main = async ({
         commitMessage: getOptionalInput('commit'),
         removeSourceBranch: getInput('remove_source_branch') === 'true',
         hasPublishScript,
+        cwd,
       })
       if (onlyChangesets) {
         execSync(onlyChangesets)

src/utils.ts

@@ -161,6 +161,18 @@ export const execSync = (command: string) =>
 
 export const getOptionalInput = (name: string) => getInput(name) || undefined
 
+export const getCwdInput = (): string => {
+  const input = getOptionalInput('cwd')
+  if (!input) {
+    return ''
+  }
+  const normalized = input.replace(/^\.\//, '').replace(/\/$/, '')
+  if (path.isAbsolute(normalized) || normalized.split('/').includes('..')) {
+    throw new Error(`Invalid cwd input: "${input}"`)
+  }
+  return normalized === '.' ? '' : normalized
+}
+
 // eslint-disable-next-line sonarjs/function-return-type
 export const getUsername = (api: Gitlab) => {
   return (