Update @shopify/polaris-migrator to accept a file list via stdin (#…

…10950)

Updates the Polaris migrator CLI to accept a file list via `stdin`.

Example usage with redirects:

```sh
npx @shopify/polaris-migrator styles-replace-custom-property \
  --decl=color \
  --from=--p-text \
  --to=--p-color-text \
  --stdin < file-list.txt
```

Example usage with piping:

```sh
git diff --name-only | npx @shopify/polaris-migrator styles-replace-custom-property \
  --decl=color \
  --from=--p-text \
  --to=--p-color-text \
  --stdin
```

.changeset/poor-llamas-taste.md

@@ -0,0 +1,5 @@
+---
+'@shopify/polaris-migrator': minor
+---
+
+Updated the CLI to accept a file list via `stdin`

polaris-migrator/src/cli.ts

@@ -57,6 +57,11 @@ export const cliConfig = createCLIConfig({
  description: 'Bypass Git safety checks and forcibly run migrations',
  type: 'boolean',
  },
+ stdin: {
+ alias: 's',
+ type: 'boolean',
+ description: 'If true, each line of the standard input is used as a path',
+ },
  },
 });
 
@@ -89,5 +94,23 @@ const {input, flags} = meow({
 });
 
 export async function run() {
- await migrate(input[0], input[1], flags);
+ let files: string | string[];
+
+ if (flags.stdin) {
+ let buffer = '';
+
+ for await (const chunk of process.stdin) {
+ buffer += chunk.toString();
+ }
+
+ files = buffer.split('\n').filter(Boolean);
+
+ if (files.length === 0) {
+ throw new Error('No files provided via stdin');
+ }
+ } else {
+ files = input[1];
+ }
+
+ await migrate(input[0], files, flags);
 }

polaris-migrator/src/migrate.ts

@@ -11,11 +11,12 @@ export interface MigrateOptions {
  dry?: boolean;
  print?: boolean;
  force?: boolean;
+ stdin?: boolean;
 }
 
 export async function migrate(
  migration: string,
- files: string,
+ files: string | string[],
  options: MigrateOptions = {},
 ) {
  const migrationFile = path.join(
@@ -28,7 +29,9 @@ export async function migrate(
  throw new Error(`No migration found for ${migration}`);
  }
 
- if (!files) throw new Error(`No path provided for migration`);
+ if (!options.stdin && !files) {
+ throw new Error(`No path provided for migration`);
+ }
 
  if (!options.dry) {
  checkGitStatus(options.force);