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'use strict';
const path = require('path');
const execa = require('execa');
const create = (columns, rows) => ({
columns: parseInt(columns, 10),
rows: parseInt(rows, 10)
});
module.exports = () => {
const env = process.env;
const stdout = process.stdout;
const stderr = process.stderr;
if (stdout && stdout.columns && stdout.rows) {
return create(stdout.columns, stdout.rows);
}
if (stderr && stderr.columns && stderr.rows) {
return create(stderr.columns, stderr.rows);
}
// These values are static, so not the first choice
if (env.COLUMNS && env.LINES) {
return create(env.COLUMNS, env.LINES);
}
if (process.platform === 'win32') {
try {
// Binary: https://github.com/sindresorhus/win-term-size
const size = execa.sync(path.join(__dirname, 'vendor/windows/term-size.exe')).stdout.split(/\r?\n/);
if (size.length === 2) {
return create(size[0], size[1]);
}
} catch (err) {}
} else {
if (process.platform === 'darwin') {
try {
// Binary: https://github.com/sindresorhus/macos-term-size
const size = execa.shellSync(path.join(__dirname, 'vendor/macos/term-size')).stdout.split(/\r?\n/);
if (size.length === 2) {
return create(size[0], size[1]);
}
} catch (err) {}
}
// `resize` is preferred as it works even when all file descriptors are redirected
// https://linux.die.net/man/1/resize
try {
const size = execa.sync('resize', ['-u']).stdout.match(/\d+/g);
if (size.length === 2) {
return create(size[0], size[1]);
}
} catch (err) {}
try {
const columns = execa.sync('tput', ['cols']).stdout;
const rows = execa.sync('tput', ['lines']).stdout;
if (columns && rows) {
return create(columns, rows);
}
} catch (err) {}
}
return create(80, 24);
};
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