Start making env

common.go

@@ -0,0 +1,18 @@
+package coreutils
+
+import (
+	"fmt"
+	"os"
+)
+
+// PrintStrings prints each string in strings on a new line
+func PrintStrings(strings []string) {
+	for _, str := range strings {
+		fmt.Println(str)
+	}
+}
+
+// PrintEnv prints all environment variables
+func PrintEnv() {
+	PrintStrings(os.Environ())
+}

env/env.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"flag"
+	"os"
+	common "source.heropunch.io/tomo/go-coreutils"
+)
+
+var ignoreEnv = flag.Bool(
+	"i",
+	false,
+	"Completely ignore the existing environment and execute cmd only with each (var, value) tuple specified.",
+)
+
+func main() {
+	flag.Parse()
+	if *ignoreEnv {
+		os.Clearenv()
+	}
+	common.PrintEnv()
+}

printenv/printenv.go

@@ -1,19 +1,13 @@
 package main
 
 import (
-	"fmt"
 	"os"
+	common "source.heropunch.io/tomo/go-coreutils"
 )
 
-func printStrings(strings []string) {
-	for _, str := range strings {
-		fmt.Println(str)
-	}
-}
-
 func main() {
 	if len(os.Args) == 1 {
-		printStrings(os.Environ())
+		common.PrintEnv()
 		os.Exit(0)
 	}
 
@@ -27,6 +21,6 @@ func main() {
 			exitCode = 1
 		}
 	}
-	printStrings(envVars)
+	common.PrintStrings(envVars)
 	os.Exit(exitCode)
 }