From 50c84a2f7df5169f7384c19465b88ff9b03702f8 Mon Sep 17 00:00:00 2001
From: Fredric Silberberg <fredric@fsilberberg.com>
Date: Wed, 24 Sep 2014 22:24:46 -0400
Subject: [PATCH] Initial cat that parses file names from the command line

---
 cat.go      |  6 ++++++
 cat/main.go | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 cat.go
 create mode 100644 cat/main.go

diff --git a/cat.go b/cat.go
new file mode 100644
index 0000000..2d14bf1
--- /dev/null
+++ b/cat.go
@@ -0,0 +1,6 @@
+package jsh
+
+type CatOutput struct {
+	Output string
+	Files []string
+}
diff --git a/cat/main.go b/cat/main.go
new file mode 100644
index 0000000..6959ea6
--- /dev/null
+++ b/cat/main.go
@@ -0,0 +1,54 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"jsh"
+	"io/ioutil"
+)
+
+func catFiles(queue chan *jsh.JshFrame) {
+	// Get all of the non-flags. The rest were processed by the main function
+	fileNames := flag.Args()
+	for _,fileName := range fileNames {
+		file, err := ioutil.ReadFile(fileName)
+
+		var jshFrame jsh.JshFrame
+
+		if err != nil {
+			errText := make(map[string]string)
+			errText[fileName] = fmt.Sprintf("%s",err.Error())
+			jshFrame = jsh.JshFrame{"", errText}
+			queue <- &jshFrame
+			continue
+		}
+
+		output := jsh.CatOutput{}
+		output.Files = []string{fileName}
+		output.Output = string(file)
+		jshFrame = jsh.JshFrame{output, ""}
+		queue <- &jshFrame
+	}
+}
+
+func runJsonMode() {
+	queue := make(chan *jsh.JshFrame)
+	done := make(chan bool)
+	go jsh.OutputFrames(queue, done)
+	catFiles(queue)
+	close(queue)
+	<-done
+}
+
+func main() {
+	// TODO: Support more flags
+	jsonModePtr := flag.Bool("json", false, "whether to use json mode for input and output")
+	flag.Parse()
+
+	if !*jsonModePtr {
+		fmt.Printf("%s", jsh.FallbackWithArgs("/usr/bin/cat", flag.Args()))
+	} else {
+		runJsonMode()
+	}
+}
+