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import _countBy from 'lodash/countBy.js';
import readline from 'node:readline';
function readStdin() {
return new Promise((resolve, reject) => {
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
terminal: false,
});
const lines = [];
rl.on('line', (line) => {
lines.push(line);
});
rl.on('close', () => {
const text = lines.join('\n');
resolve(text);
});
rl.on('error', reject);
});
}
// The JSON input format for variables is:
// an array of objects, each having:
// a "name" property with a string and value
// a "value" property with a string and value
// TODO: This should be moved and unit tested in the clever-client repo
function parseFromJson(rawStdin) {
let variables;
try {
variables = JSON.parse(rawStdin);
} catch (e) {
throw new Error(`Error when parsing JSON input: ${e.message}`);
}
if (!Array.isArray(variables) || variables.some((entry) => typeof entry !== 'object')) {
throw new Error(
'The input was valid JSON but it does not follow the correct format. It must be an array of objects.',
);
}
const someEntriesDontHaveNameAndValueAsString = variables.some(({ name, value }) => {
return typeof name !== 'string' || typeof value !== 'string';
});
if (someEntriesDontHaveNameAndValueAsString) {
throw new Error(
'The input was a valid JSON array of objects but all entries must have properties "name" and "value" of type string. Ex: { "name": "THE_NAME", "value": "the value" }',
);
}
const namesOccurences = _countBy(variables, 'name');
const duplicatedNames = Object.entries(namesOccurences)
.filter(([_name, count]) => count > 1)
.map(([name]) => `"${name}"`)
.join(', ');
if (duplicatedNames.length !== 0) {
throw new Error(`Some variable names defined multiple times: ${duplicatedNames}`);
}
const invalidNames = variables
.filter(({ name }) => !validateName(name))
.map(({ name }) => `"${name}"`)
.join(', ');
if (invalidNames.length !== 0) {
throw new Error(`Some variable names are invalid: ${invalidNames}`);
}
return toNameValueObject(variables);
}
function parseFromNameEqualsValue(rawStdin) {
const { variables, errors } = parseRaw(rawStdin);
if (errors.length !== 0) {
const formattedErrors = errors
.map(({ type, name, pos }) => {
if (type === ERROR_TYPES.INVALID_NAME) {
return `line ${pos.line}: ${name} is not a valid variable name`;
}
if (type === ERROR_TYPES.DUPLICATED_NAME) {
return `line ${pos.line}: be careful, the name ${name} is already defined`;
}
if (type === ERROR_TYPES.INVALID_LINE) {
return `line ${pos.line}: this line is not valid, the correct pattern is: NAME="VALUE"`;
}
if (type === ERROR_TYPES.INVALID_VALUE) {
return `line ${pos.line}: the value is not valid, if you use quotes, you need to escape them like this: \\" or quote the whole value.`;
}
return 'Unknown error in your input';
})
.join('\n');
throw new Error(formattedErrors);
}
return toNameValueObject(variables);
}
export async function readVariablesFromStdin(format) {
const rawStdin = await readStdin();
switch (format) {
case 'name-equals-value':
return parseFromNameEqualsValue(rawStdin);
case 'json':
return parseFromJson(rawStdin);
default:
throw new Error("Unrecognized environment input format. Available formats are 'name-equals-value' and 'json'");
}
}
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