flow like the river

VISUALIZACION/node_modules/sha.js/bin.js

@@ -0,0 +1,41 @@
+#! /usr/bin/env node
+
+var createHash = require('./browserify')
+var argv = process.argv.slice(2)
+
+function pipe (algorithm, s) {
+  var start = Date.now()
+  var hash = createHash(algorithm || 'sha1')
+
+  s.on('data', function (data) {
+    hash.update(data)
+  })
+
+  s.on('end', function () {
+    if (process.env.DEBUG) {
+      return console.log(hash.digest('hex'), Date.now() - start)
+    }
+
+    console.log(hash.digest('hex'))
+  })
+}
+
+function usage () {
+  console.error('sha.js [algorithm=sha1] [filename] # hash filename with algorithm')
+  console.error('input | sha.js [algorithm=sha1]    # hash stdin with algorithm')
+  console.error('sha.js --help                      # display this message')
+}
+
+if (!process.stdin.isTTY) {
+  pipe(argv[0], process.stdin)
+} else if (argv.length) {
+  if (/--help|-h/.test(argv[0])) {
+    usage()
+  } else {
+    var filename = argv.pop()
+    var algorithm = argv.pop()
+    pipe(algorithm, require('fs').createReadStream(filename))
+  }
+} else {
+  usage()
+}