backstage

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/*
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 * Copyright 2020 The Backstage Authors
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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/**
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 * A collection of codemods for Backstage projects
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 *
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 * @packageDocumentation
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 */
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import { program } from 'commander';
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import chalk from 'chalk';
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import { codemods } from './codemods';
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import { exitWithError } from './errors';
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import { createCodemodAction } from './action';
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import { version } from '../package.json';
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async function main(argv: string[]) {
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  program.name('backstage-codemods').version(version);
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  const applyCommand = program
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    .command('apply <codemod> [target-dirs...]')
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    .description(
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      'Apply a codemod to target directories, defaulting to the current directory',
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    );
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  for (const codemod of codemods) {
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    applyCommand
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      .command(`${codemod.name} [target-dirs...]`)
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      .description(codemod.description)
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      .option('-d, --dry', 'Dry run, no changes written to files')
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      .action(createCodemodAction(codemod.name));
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  }
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  program
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    .command('list')
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    .description('List available codemods')
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    .action(() => {
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      const maxNameLength = Math.max(...codemods.map(m => m.name.length));
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      for (const codemod of codemods) {
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        const paddedName = codemod.name.padEnd(maxNameLength, ' ');
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        console.log(`${paddedName} - ${codemod.description}`);
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      }
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    });
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  program.on('command:*', () => {
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    console.log();
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    console.log(chalk.red(`Invalid command: ${program.args.join(' ')}`));
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    console.log();
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    program.outputHelp();
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    process.exit(1);
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  });
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  program.parse(argv);
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}
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process.on('unhandledRejection', (rejection: unknown) => {
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  if (rejection instanceof Error) {
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    exitWithError(rejection);
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  } else {
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    exitWithError(new Error(`Unknown rejection: '${rejection}'`));
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  }
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});
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main(process.argv).catch(exitWithError);
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