feat(cli): allow users to enable all feature flags that do not impact their application (#798)

Allows users to run `cdk flags --safe` to set all unconfigured feature
flags to their recommended states without changing their CloudFormation
template.

---
By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license

---------

Co-authored-by: Rico Huijbers <[email protected]>

Author: vivian12300

.projenrc.ts

@@ -1161,6 +1161,7 @@ const cli = configureProject(
       'glob',
       'minimatch',
       'p-limit@^3',
+      'p-queue@^6',
       'promptly',
       'proxy-agent',
       'semver',

packages/@aws-cdk/cli-lib-alpha/THIRD_PARTY_LICENSES

@@ -22090,6 +22090,32 @@ SOFTWARE.
 
 
 
+----------------
+
+** [email protected] - https://www.npmjs.com/package/eventemitter3/v/4.0.7 | MIT
+The MIT License (MIT)
+
+Copyright (c) 2014 Arnout Kazemier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
 ----------------
 
 ** [email protected] - https://www.npmjs.com/package/fast-deep-equal/v/3.1.3 | MIT
@@ -22846,6 +22872,32 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
+----------------
+
+** [email protected] - https://www.npmjs.com/package/p-finally/v/1.0.0 | MIT
+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <[email protected]> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+
 ----------------
 
 ** [email protected] - https://www.npmjs.com/package/p-limit/v/2.3.0 | MIT
@@ -22888,6 +22940,34 @@ The above copyright notice and this permission notice shall be included in all c
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
+----------------
+
+** [email protected] - https://www.npmjs.com/package/p-queue/v/6.6.2 | MIT
+MIT License
+
+Copyright (c) Sindre Sorhus <[email protected]> (https://sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+----------------
+
+** [email protected] - https://www.npmjs.com/package/p-timeout/v/3.2.0 | MIT
+MIT License
+
+Copyright (c) Sindre Sorhus <[email protected]> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
 ----------------
 
 ** [email protected] - https://www.npmjs.com/package/p-try/v/2.2.0 | MIT

packages/@aws-cdk/toolkit-lib/lib/toolkit/toolkit.ts

@@ -1393,3 +1393,4 @@ export class Toolkit extends CloudAssemblySourceBuilder {
     }
   }
 }
+

packages/aws-cdk/.projen/deps.json

@@ -21883,6 +21883,32 @@ SOFTWARE.
 
 
 
+----------------
+
+** [email protected] - https://www.npmjs.com/package/eventemitter3/v/4.0.7 | MIT
+The MIT License (MIT)
+
+Copyright (c) 2014 Arnout Kazemier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
 ----------------
 
 ** [email protected] - https://www.npmjs.com/package/fast-deep-equal/v/3.1.3 | MIT
@@ -22639,6 +22665,32 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
+----------------
+
+** [email protected] - https://www.npmjs.com/package/p-finally/v/1.0.0 | MIT
+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <[email protected]> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+
 ----------------
 
 ** [email protected] - https://www.npmjs.com/package/p-limit/v/2.3.0 | MIT
@@ -22681,6 +22733,34 @@ The above copyright notice and this permission notice shall be included in all c
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
+----------------
+
+** [email protected] - https://www.npmjs.com/package/p-queue/v/6.6.2 | MIT
+MIT License
+
+Copyright (c) Sindre Sorhus <[email protected]> (https://sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+----------------
+
+** [email protected] - https://www.npmjs.com/package/p-timeout/v/3.2.0 | MIT
+MIT License
+
+Copyright (c) Sindre Sorhus <[email protected]> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
 ----------------
 
 ** [email protected] - https://www.npmjs.com/package/p-try/v/2.2.0 | MIT

packages/aws-cdk/THIRD_PARTY_LICENSES

@@ -129,7 +129,9 @@ export async function makeConfig(): Promise<CliConfig> {
           unconfigured: { type: 'boolean', desc: 'Modify unconfigured feature flags', requiresArg: false },
           recommended: { type: 'boolean', desc: 'Change flags to recommended states', requiresArg: false },
           default: { type: 'boolean', desc: 'Change flags to default state', requiresArg: false },
-          interactive: { type: 'boolean', alias: ['i'], desc: 'Interactive option for the flags command', requiresArg: false },
+          interactive: { type: 'boolean', alias: ['i'], desc: 'Interactive option for the flags command' },
+          safe: { type: 'boolean', desc: 'Enable all feature flags that do not impact the user\'s application', requiresArg: false },
+          concurrency: { type: 'number', alias: ['n'], desc: 'Maximum number of simultaneous synths to execute.', default: 4, requiresArg: true },
         },
       },
       'deploy': {

packages/aws-cdk/lib/cli/cli-config.ts

@@ -383,8 +383,21 @@
           "alias": [
             "i"
           ],
-          "desc": "Interactive option for the flags command",
+          "desc": "Interactive option for the flags command"
+        },
+        "safe": {
+          "type": "boolean",
+          "desc": "Enable all feature flags that do not impact the user's application",
           "requiresArg": false
+        },
+        "concurrency": {
+          "type": "number",
+          "alias": [
+            "n"
+          ],
+          "desc": "Maximum number of simultaneous synths to execute.",
+          "default": 4,
+          "requiresArg": true
         }
       }
     },

packages/aws-cdk/lib/cli/cli-type-registry.json

@@ -26,7 +26,7 @@ import type { Settings } from '../api/settings';
 import { contextHandler as context } from '../commands/context';
 import { docs } from '../commands/docs';
 import { doctor } from '../commands/doctor';
-import { handleFlags } from '../commands/flag-operations';
+import { FlagCommandHandler } from '../commands/flags/flags';
 import { cliInit, printAvailableTemplates } from '../commands/init';
 import { getMigrateScanType } from '../commands/migrate';
 import { execProgram, CloudExecutable } from '../cxapp';
@@ -501,7 +501,8 @@ export async function exec(args: string[], synthesizer?: Synthesizer): Promise<n
           unstableFeatures: configuration.settings.get(['unstable']),
         });
         const flagsData = await toolkit.flags(cloudExecutable);
-        return handleFlags(flagsData, ioHelper, args, toolkit);
+        const handler = new FlagCommandHandler(flagsData, ioHelper, args, toolkit);
+        return handler.processFlagsCommand();
 
       case 'synthesize':
       case 'synth':

packages/aws-cdk/lib/cli/cli.ts

@@ -105,6 +105,8 @@ export function convertYargsToUserInput(args: any): UserInput {
         recommended: args.recommended,
         default: args.default,
         interactive: args.interactive,
+        safe: args.safe,
+        concurrency: args.concurrency,
         FLAGNAME: args.FLAGNAME,
       };
       break;
@@ -391,6 +393,8 @@ export function convertConfigToUserInput(config: any): UserInput {
     recommended: config.flags?.recommended,
     default: config.flags?.default,
     interactive: config.flags?.interactive,
+    safe: config.flags?.safe,
+    concurrency: config.flags?.concurrency,
   };
   const deployOptions = {
     all: config.deploy?.all,

packages/aws-cdk/lib/cli/convert-to-user-input.ts

@@ -409,7 +409,19 @@ export function parseCommandLineArguments(args: Array<string>): any {
           type: 'boolean',
           alias: ['i'],
           desc: 'Interactive option for the flags command',
+        })
+        .option('safe', {
+          default: undefined,
+          type: 'boolean',
+          desc: "Enable all feature flags that do not impact the user's application",
           requiresArg: false,
+        })
+        .option('concurrency', {
+          default: 4,
+          type: 'number',
+          alias: ['n'],
+          desc: 'Maximum number of simultaneous synths to execute.',
+          requiresArg: true,
         }),
     )
     .command('deploy [STACKS..]', 'Deploys the stack(s) named STACKS into your AWS account', (yargs: Argv) =>