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'use strict';
var platform = require('os').platform();
var spawnSync = require('child_process').spawnSync;
var readdirSync = require('fs').readdirSync;
var GLIBC = 'glibc';
var MUSL = 'musl';
var spawnOptions = {
encoding: 'utf8',
env: process.env
};
if (!spawnSync) {
spawnSync = function () {
return { status: 126, stdout: '', stderr: '' };
};
}
function contains (needle) {
return function (haystack) {
return haystack.indexOf(needle) !== -1;
};
}
function versionFromMuslLdd (out) {
return out.split(/[\r\n]+/)[1].trim().split(/\s/)[1];
}
function safeReaddirSync (path) {
try {
return readdirSync(path);
} catch (e) {}
return [];
}
var family = '';
var version = '';
var method = '';
if (platform === 'linux') {
// Try getconf
var glibc = spawnSync('getconf', ['GNU_LIBC_VERSION'], spawnOptions);
if (glibc.status === 0) {
family = GLIBC;
version = glibc.stdout.trim().split(' ')[1];
method = 'getconf';
} else {
// Try ldd
var ldd = spawnSync('ldd', ['--version'], spawnOptions);
if (ldd.status === 0 && ldd.stdout.indexOf(MUSL) !== -1) {
family = MUSL;
version = versionFromMuslLdd(ldd.stdout);
method = 'ldd';
} else if (ldd.status === 1 && ldd.stderr.indexOf(MUSL) !== -1) {
family = MUSL;
version = versionFromMuslLdd(ldd.stderr);
method = 'ldd';
} else {
// Try filesystem (family only)
var lib = safeReaddirSync('/lib');
if (lib.some(contains('-linux-gnu'))) {
family = GLIBC;
method = 'filesystem';
} else if (lib.some(contains('libc.musl-'))) {
family = MUSL;
method = 'filesystem';
} else if (lib.some(contains('ld-musl-'))) {
family = MUSL;
method = 'filesystem';
} else {
var usrSbin = safeReaddirSync('/usr/sbin');
if (usrSbin.some(contains('glibc'))) {
family = GLIBC;
method = 'filesystem';
}
}
}
}
}
var isNonGlibcLinux = (family !== '' && family !== GLIBC);
module.exports = {
GLIBC: GLIBC,
MUSL: MUSL,
family: family,
version: version,
method: method,
isNonGlibcLinux: isNonGlibcLinux
};