minimal cli

Close #10

Author: MoOx

bin/cssnext

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+
+var colors = require("colors")
+
+var program = require("commander")
+
+var path = require("path")
+
+var cssnext = require("..")
+var pkg = require("../package")
+
+program
+  .version(pkg.version)
+  .usage("[options] [<input> [<output>]]")
+
+program.parse(process.argv)
+
+var input = program.args[0] ? path.resolve(program.args[0]) : null
+var output = program.args[1] ? path.resolve(program.args[1]) : null
+function transform() {
+  require("read-file-stdin")(input, function(err, buffer) {
+    if (err) {
+      throw err
+    }
+
+    try {
+      var css = cssnext(buffer.toString(), {
+        features: program,
+        from: input,
+        sourcemap: Boolean(program.sourcemap)
+      })
+
+      require("write-file-stdout")(output, css)
+    }
+    catch (e) {
+      console.error()
+      console.error()
+      console.error(colors.bold("cssnext encounters an error:"))
+      console.error()
+      console.error(e.message.red)
+      console.error()
+      console.error(e.stack.split("\n").slice(1).join("\n").grey)
+      console.error()
+      console.error("If this error looks like a bug, please report it here:")
+      console.error(colors.grey("❯ ") + pkg.bugs.url.cyan)
+      console.error()
+      process.exit(2)
+    }
+  })
+}
+
+transform()

package.json

@@ -28,14 +28,20 @@
   ],
   "dependencies": {
     "autoprefixer": "^2.2.0",
+    "colors": "^0.6.2",
+    "commander": "^2.3.0",
     "csswring": "^1.0.0",
+    "node-watch": "^0.3.4",
     "postcss": "^2.1.0",
     "postcss-calc": "^2.0.1",
     "postcss-color": "^1.0.0",
     "postcss-custom-media": "^1.0.0",
     "postcss-custom-properties": "^0.1.0",
     "postcss-import": "^1.0.0",
-    "to-slug-case": "^0.1.2"
+    "read-file-stdin": "0.0.4",
+    "to-slug-case": "^0.1.2",
+    "to-space-case": "^0.1.3",
+    "write-file-stdout": "0.0.2"
   },
   "devDependencies": {
     "browserify": "^5.10.0",

test/cli/error.css

@@ -0,0 +1,3 @@
+body {
+  color: var(--red)
+}

test/cli/input.css

@@ -0,0 +1,7 @@
+:root {
+  --red: #e00;
+}
+
+body {
+  color: var(--red);
+}

test/cli/input.expected.css

@@ -0,0 +1,5 @@
+
+
+body {
+  color: #e00;
+}

test/index.js

@@ -81,6 +81,35 @@ test("sourcemap", function(t) {
 })
 
 /**
+ * CLI tests.
+ */
+
+test("cli", function(t) {
+  var exec = require("child_process").exec
+
+  var output = read("cli/input.expected")
+
+  var planned = 0
+
+  exec("bin/cssnext test/cli/input.css test/cli/output.css", function(err) {
+    if (err) { throw err }
+    var res = read("cli/output")
+    t.equal(res, output, "should read from a file and write to a file")
+    remove("cli/output")
+  })
+  planned+=1
+
+  exec("bin/cssnext test/cli/error.css", function(err, stdout, stderr) {
+    t.ok(err && err.code === 2, "should throw an error")
+    t.ok(contains(stderr, "encounters an error"), "should output a readable error")
+    t.ok(contains(stderr, "If this error looks like a bug, please report it here"), "should show the url where to report bugs")
+  })
+  planned+=3
+
+  t.plan(planned)
+})
+
+/*
  * Resolve a fixture by `filename`.
  *
  * @param {String} filename
@@ -107,13 +136,23 @@ function read(filename) {
  *
  * @param {String} filename
  */
+function remove(filename) {
+  var fs = require("fs")
+
+  var file = resolve(filename)
+  if (!fs.existsSync(file)) {
+    return
+  }
+  fs.unlinkSync(file)
+}
 
-// function remove(filename) {
-//   var fs = require("fs")
-//
-//   var file = resolve(filename)
-//   if (!fs.existsSync(file)) {
-//     return
-//   }
-//   fs.unlinkSync(file)
-// }
+/**
+ * Check if a string is contained into another
+ *
+ * @param  {String}  string string to look into
+ * @param  {String}  piece  string to find
+ * @return {Boolean}        returns true if piece is contained in string
+ */
+function contains(string, piece) {
+  return Boolean(string.indexOf(piece) + 1)
+}