nonbinary.computer
OR-1 dataflow CPU sketch
1'use strict';
2// Descend into a directory structure and, for each file matching *.node, output
3// based on the imports found in the file whether it's an N-API module or not.
4
5const fs = require('fs');
6const path = require('path');
7
8// Read the output of the command, break it into lines, and use the reducer to
9// decide whether the file is an N-API module or not.
10function checkFile (file, command, argv, reducer) {
11 const child = require('child_process').spawn(command, argv, {
12 stdio: ['inherit', 'pipe', 'inherit']
13 });
14 let leftover = '';
15 let isNapi;
16 child.stdout.on('data', (chunk) => {
17 if (isNapi === undefined) {
18 chunk = (leftover + chunk.toString()).split(/[\r\n]+/);
19 leftover = chunk.pop();
20 isNapi = chunk.reduce(reducer, isNapi);
21 if (isNapi !== undefined) {
22 child.kill();
23 }
24 }
25 });
26 child.on('close', (code, signal) => {
27 if ((code === null && signal !== null) || (code !== 0)) {
28 console.log(
29 command + ' exited with code: ' + code + ' and signal: ' + signal);
30 } else {
31 // Green if it's a N-API module, red otherwise.
32 console.log(
33 '\x1b[' + (isNapi ? '42' : '41') + 'm' +
34 (isNapi ? ' N-API' : 'Not N-API') +
35 '\x1b[0m: ' + file);
36 }
37 });
38}
39
40// Use nm -a to list symbols.
41function checkFileUNIX (file) {
42 checkFile(file, 'nm', ['-a', file], (soFar, line) => {
43 if (soFar === undefined) {
44 line = line.match(/([0-9a-f]*)? ([a-zA-Z]) (.*$)/);
45 if (line[2] === 'U') {
46 if (/^napi/.test(line[3])) {
47 soFar = true;
48 }
49 }
50 }
51 return soFar;
52 });
53}
54
55// Use dumpbin /imports to list symbols.
56function checkFileWin32 (file) {
57 checkFile(file, 'dumpbin', ['/imports', file], (soFar, line) => {
58 if (soFar === undefined) {
59 line = line.match(/([0-9a-f]*)? +([a-zA-Z0-9]) (.*$)/);
60 if (line && /^napi/.test(line[line.length - 1])) {
61 soFar = true;
62 }
63 }
64 return soFar;
65 });
66}
67
68// Descend into a directory structure and pass each file ending in '.node' to
69// one of the above checks, depending on the OS.
70function recurse (top) {
71 fs.readdir(top, (error, items) => {
72 if (error) {
73 throw new Error('error reading directory ' + top + ': ' + error);
74 }
75 items.forEach((item) => {
76 item = path.join(top, item);
77 fs.stat(item, ((item) => (error, stats) => {
78 if (error) {
79 throw new Error('error about ' + item + ': ' + error);
80 }
81 if (stats.isDirectory()) {
82 recurse(item);
83 } else if (/[.]node$/.test(item) &&
84 // Explicitly ignore files called 'nothing.node' because they are
85 // artefacts of node-addon-api having identified a version of
86 // Node.js that ships with a correct implementation of N-API.
87 path.basename(item) !== 'nothing.node') {
88 process.platform === 'win32'
89 ? checkFileWin32(item)
90 : checkFileUNIX(item);
91 }
92 })(item));
93 });
94 });
95}
96
97// Start with the directory given on the command line or the current directory
98// if nothing was given.
99recurse(process.argv.length > 3 ? process.argv[2] : '.');