datakit/build/cli/to-csv.js

Simple JavaScript toolkit for data transform across JSON, CSV and YAML.

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.documentation = exports.main = void 0;
var io_1 = require("../lib/io");
var verify_1 = require("../lib/verify");
var help_1 = require("./lib/help");
function main(argv, flags) {
    return __awaiter(this, void 0, void 0, function () {
        var data, columnNames;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0: return [4 /*yield*/, (0, io_1.inputData)(argv)];
                case 1:
                    data = _a.sent();
                    (0, verify_1.verifyInputArray)(data, "to-csv");
                    columnNames = flags.columns ? flags.columns.split(",").map(function (column) { return column.trim(); }) : undefined;
                    return [4 /*yield*/, (0, io_1.outputData)(argv, data, "csv", {
                            columnNames: columnNames,
                        })];
                case 2:
                    _a.sent();
                    return [2 /*return*/];
            }
        });
    });
}
exports.main = main;
exports.documentation = {
    name: "to-csv",
    desc: "Converts data from the JSON data format to the CSV data format.",
    syntax: "to-csv [options] [<input-file>] [<csv-output-file>]",
    inputs: help_1.standardCmdInputs,
    outputs: [
        "CSV file",
        "CSV formatted data on standard output",
    ],
    args: [
        help_1.standardInputFileHelp,
        {
            name: "csv-output-file",
            desc: "The name of a file (must be a CSV file) to output the resulting dataset to. Omitting this causes CSV data to be written to standard output.",
        },
    ],
    options: [
        {
            names: ['columns', 'c'],
            placeholder: '<column-names>',
            example: "ColumnA,ColumnB,ColumnC",
            desc: "Sets the columns (and their order) that will be included in the output CSV"
        },
    ],
    examples: [
        {
            name: "Reads JSON data from standard input and writes CSV data to standard output",
            cmd: 'command-that-produces-json | to-csv -',
        },
        {
            name: "Reads JSON data from standard input and writes a CSV data file",
            cmd: 'command-that-produces-json | to-csv output-file.csv',
        },
        {
            name: "Reads a JSON data file and writes a CSV data file",
            cmd: 'to-csv input-file.json output-file.csv',
        },
        {
            name: "Reads a YAML data file and writes a CSV data file",
            cmd: 'to-csv input-file.yaml output-file.csv',
        },
        {
            name: "Writes a CSV file setting the column names",
            cmd: 'to-csv input-file.json output-file.csv --columns ColumnA,ColumnB,ColumnC',
        },
    ],
};
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