120 lines
2.8 KiB
JavaScript
120 lines
2.8 KiB
JavaScript
const query = process.argv[2]
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const fs = require('fs')
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const childProcess = require('child_process')
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const SYSTEM_PATHS = [
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'/lib',
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'/usr/lib',
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'/usr/lib64',
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'/usr/local/lib',
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'/opt/local/lib',
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'/opt/homebrew/lib',
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'/usr/lib/x86_64-linux-gnu',
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'/usr/lib/i386-linux-gnu',
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'/usr/lib/arm-linux-gnueabihf',
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'/usr/lib/arm-linux-gnueabi',
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'/usr/lib/aarch64-linux-gnu'
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]
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/**
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* Checks for lib using ldconfig if present, or searching SYSTEM_PATHS
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* otherwise.
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* @param {string} lib - library name, e.g. 'jpeg' in 'libjpeg64.so' (see first line)
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* @return {boolean} exists
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*/
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function hasSystemLib (lib) {
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const libName = 'lib' + lib + '.+(so|dylib)'
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const libNameRegex = new RegExp(libName)
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// Try using ldconfig on linux systems
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if (hasLdconfig()) {
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try {
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if (childProcess.execSync('ldconfig -p 2>/dev/null | grep -E "' + libName + '"').length) {
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return true
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}
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} catch (err) {
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// noop -- proceed to other search methods
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}
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}
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// Try checking common library locations
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return SYSTEM_PATHS.some(function (systemPath) {
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try {
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const dirListing = fs.readdirSync(systemPath)
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return dirListing.some(function (file) {
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return libNameRegex.test(file)
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})
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} catch (err) {
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return false
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}
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})
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}
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/**
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* Checks for ldconfig on the path and /sbin
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* @return {boolean} exists
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*/
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function hasLdconfig () {
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try {
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// Add /sbin to path as ldconfig is located there on some systems -- e.g.
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// Debian (and it can still be used by unprivileged users):
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childProcess.execSync('export PATH="$PATH:/sbin"')
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process.env.PATH = '...'
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// execSync throws on nonzero exit
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childProcess.execSync('hash ldconfig 2>/dev/null')
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return true
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} catch (err) {
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return false
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}
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}
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/**
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* Checks for freetype2 with --cflags-only-I
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* @return Boolean exists
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*/
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function hasFreetype () {
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try {
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if (childProcess.execSync('pkg-config cairo --cflags-only-I 2>/dev/null | grep freetype2').length) {
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return true
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}
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} catch (err) {
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// noop
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}
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return false
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}
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/**
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* Checks for lib using pkg-config.
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* @param {string} lib - library name
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* @return {boolean} exists
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*/
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function hasPkgconfigLib (lib) {
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try {
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// execSync throws on nonzero exit
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childProcess.execSync('pkg-config --exists "' + lib + '" 2>/dev/null')
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return true
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} catch (err) {
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return false
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}
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}
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function main (query) {
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switch (query) {
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case 'gif':
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case 'cairo':
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return hasSystemLib(query)
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case 'pango':
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return hasPkgconfigLib(query)
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case 'freetype':
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return hasFreetype()
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case 'jpeg':
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return hasPkgconfigLib('libjpeg')
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case 'rsvg':
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return hasPkgconfigLib('librsvg-2.0')
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default:
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throw new Error('Unknown library: ' + query)
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}
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}
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process.stdout.write(main(query).toString())
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