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-rw-r--r--src/PsModuleMap.js66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/PsModuleMap.js b/src/PsModuleMap.js
new file mode 100644
index 0000000..2193f02
--- /dev/null
+++ b/src/PsModuleMap.js
@@ -0,0 +1,66 @@
1'use strict';
2
3const path = require('path');
4
5const Promise = require('bluebird');
6
7const fs = Promise.promisifyAll(require('fs'));
8
9const globby = require('globby');
10
11const debug = require('debug')('purs-loader')
12
13const srcModuleRegex = /(?:^|\n)module\s+([\w\.]+)/i
14
15function match(str) {
16 const matches = str.match(srcModuleRegex);
17 return matches && matches[1];
18}
19module.exports.match = match;
20
21function makeMapEntry(filePurs) {
22 const dirname = path.dirname(filePurs);
23
24 const basename = path.basename(filePurs, '.purs');
25
26 const fileJs = path.join(dirname, `${basename}.js`);
27
28 const result = Promise.props({
29 filePurs: fs.readFileAsync(filePurs, 'utf8'),
30 fileJs: fs.readFileAsync(fileJs, 'utf8').catch(() => undefined)
31 }).then(fileMap => {
32 const sourcePurs = fileMap.filePurs;
33
34 const sourceJs = fileMap.fileJs;
35
36 const moduleName = match(sourcePurs);
37
38 const map = {};
39
40 map[moduleName] = map[moduleName] || {};
41
42 map[moduleName].src = path.resolve(filePurs);
43
44 if (sourceJs) {
45 map[moduleName].ffi = path.resolve(fileJs);
46 }
47
48 return map;
49 });
50
51 return result;
52}
53module.exports.makeMapEntry = makeMapEntry;
54
55function makeMap(src) {
56 debug('loading PureScript source and FFI files from %o', src);
57
58 const globs = [].concat(src);
59
60 return globby(globs).then(paths =>
61 Promise.all(paths.map(makeMapEntry)).then(result =>
62 result.reduce(Object.assign, {})
63 )
64 );
65}
66module.exports.makeMap = makeMap;