MyCrypto/common/freezer.ts

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import { spawn } from 'child_process';
import * as path from 'path';
import * as fs from 'fs';
const PROJECT_BASE = path.resolve('./');
const ORACLE_BRANCH = 'develop';
const GET_PACKAGE_CMD = `git show ${ORACLE_BRANCH}:package.json`;
const GET_DIFF_CMD = `git diff origin/${ORACLE_BRANCH}`;
const newFileRegEx = /^\+\+\+ b\//;
const frozenFolderRegEx = /\/\*$/;
const start = async () => {
try {
const packageStr = await runShCommand(GET_PACKAGE_CMD);
const diff = await runShCommand(GET_DIFF_CMD);
const { frozen } = JSON.parse(packageStr);
if (frozen === undefined) {
console.log(
`Freezer: No config found in package.json on branch ${
ORACLE_BRANCH
}. Exiting.`
);
return;
}
const newFiles = getNewFiles(diff);
const frozenFiles = getFrozenFiles(frozen);
const frozenFolders = getFrozenFolders(frozen);
ensureNewFilesAreNotFrozen(newFiles, frozenFiles, frozenFolders);
} catch (err) {
console.log(err.message);
exit();
}
};
const ensureNewFilesAreNotFrozen = (
newFiles: string[],
frozenFiles: string[],
frozenFolders: string[]
): void => {
const errors = newFiles
.map(file => {
if (frozenFiles.indexOf(file) !== -1) {
return `"${file}" is frozen`;
}
if (isFileInFrozenFolders(file, frozenFolders)) {
return `"${file}" is in a frozen folder`;
}
})
.filter(err => err);
if (errors.length) {
throw new Error(`Frozen files have been modified:\n${errors.join('\n')}`);
} else {
console.log('Freezer: no frozen files modified.');
}
};
const isFileInFrozenFolders = (file: string, folders: string[]): boolean =>
folders.reduce((isFrozen, folder) => {
if (isFrozen) {
return isFrozen;
}
const folderSplit = folder.replace(frozenFolderRegEx, '').split('/');
const fileSplit = file.split('/').slice(0, folderSplit.length);
return JSON.stringify(folderSplit) === JSON.stringify(fileSplit);
}, false);
const getFrozenFiles = (frozen: string[]): string[] =>
frozen.filter(f => !frozenFolderRegEx.test(f));
const getFrozenFolders = (frozen: string[]): string[] =>
frozen.filter(f => frozenFolderRegEx.test(f));
const getNewFiles = (diff: string): string[] =>
diff
.split('\n')
.filter(line => newFileRegEx.test(line))
.map(line => line.replace(newFileRegEx, ''));
const runShCommand = (cmd: string): Promise<string> =>
new Promise((resolve, reject) => {
const sh = spawn('sh', ['-c', cmd]);
const stdout: string[] = [];
const stderr: string[] = [];
sh.stdout.on('data', data => {
stdout.push(data.toString());
});
sh.stderr.on('data', data => {
stderr.push(data.toString());
});
sh.on('close', code => {
if (code !== 0) {
console.error(stderr.join(''));
reject(`Child process closed with code ${code}`);
}
resolve(stdout.join(''));
});
});
const isTravisPushJob = () => {
const prb = process.env.TRAVIS_PULL_REQUEST_BRANCH;
return typeof prb === 'string' && prb.length === 0;
};
const exit = () => setTimeout(() => process.exit(1), 100);
// check to make sure that all of the freezer config in
// the "frozen" property of package.json is valid
const validateConfig = () => {
try {
const packagePath = path.resolve(PROJECT_BASE, 'package.json');
const { frozen } = JSON.parse(fs.readFileSync(packagePath, 'utf8'));
if (frozen === undefined) {
console.log(
`Freezer: No config found in package.json on branch ${
ORACLE_BRANCH
}. Exiting.`
);
return;
}
if (!Array.isArray(frozen)) {
throw new Error(`Property "frozen" is not an array`);
}
const errors = frozen
.map(filePath => {
const isFolder = frozenFolderRegEx.test(filePath);
const fullPath = isFolder
? path.resolve(PROJECT_BASE, filePath.replace(frozenFolderRegEx, ''))
: path.resolve(PROJECT_BASE, filePath);
if (!fs.existsSync(fullPath)) {
return `"${filePath}" does not exist`;
}
const stats = fs.lstatSync(fullPath);
if (isFolder) {
if (!stats.isDirectory()) {
return `"${filePath}" is not a folder`;
}
} else {
if (!stats.isFile()) {
return `"${filePath}" is not a file`;
}
}
})
.filter(err => err);
if (errors.length) {
throw new Error(errors.join('\n'));
} else {
console.log('Freezer: Config is valid.');
}
} catch (err) {
console.log(`Freezer: Invalid config on package.json:\n${err.message}`);
exit();
}
};
if (isTravisPushJob()) {
console.log('Freezer: Travis push job detected. Exiting.');
} else if (process.argv[2] === '--validate') {
validateConfig();
} else {
start();
}