Add touch utility

cat.nim

@@ -4,7 +4,7 @@ import common
 proc catFile(file:string) =
     if not existsFile(file):
         echo "cat: " & file & ": No such file or directory"
-        return
+        system.quit 1
     var s = newFileStream(file, fmRead)
     while not s.atEnd:
         write(stdout, s.readChar)

nimbase.nimble

@@ -8,6 +8,6 @@ requires      "nim >= 0.19.0"
 requires      "cligen >= 0.9.19"
 requires      "stint >= 0.0.1"
 
-bin           = @["add", "cat", "cp", "div", "echo", "factor", "false", "head", "mkdir", "mul", "rm", "seq", "sleep", "sub", "tee", "true", "yes"]
+bin           = @["add", "cat", "cp", "div", "echo", "factor", "false", "head", "mkdir", "mul", "rm", "seq", "sleep", "sub", "tee", "touch", "true", "yes"]
 
 binDir        = "bin"

rm.nim

@@ -1,6 +1,9 @@
-import cligen, os
+import cligen, os, system
 import common
 
+const
+    errorMsg = "rm: cannot remove '"
+
 proc main(files:seq[string], force=false, recursive=false) =
     for file in files:
         if existsFile(file):
@@ -9,8 +12,10 @@ proc main(files:seq[string], force=false, recursive=false) =
             if recursive:
                 removeDir(file)
             else:
-                echo "rm: cannot remove '" & file & "': Is a directory"
+                echo errorMsg & file & "': Is a directory"
+                programResult = 1
         else:
-            echo "rm: cannot remove '" & file & "': No such file or directory"
+            echo errorMsg & file & "': No such file or directory"
+            programResult = 1
 
 dispatch(main, version=("version", nimbaseVersion))

touch.nim

@@ -0,0 +1,10 @@
+import cligen, os, times, streams
+import common
+
+proc main(files:seq[string]) =
+    for file in files:
+        if not existsFile(file):
+            discard newFileStream(file, fmWrite)
+        setLastModificationTime(file, getTime())
+
+dispatch(main, version=("version", nimbaseVersion))