add print helper

src/latest.nim

@@ -1,4 +1,5 @@
 import std/[os, posix, posix_utils]
+import lib/prnt
 
 proc `<`(t1, t2: Time): bool {.borrow.}
 
@@ -19,5 +20,4 @@ for dir in params:
     if latest[1] < tim:
       latest = (file.path, tim)
 
-stdout.write latest[0]
-stdout.flushFile
+prnt latest[0]

src/lib/prnt.nim

@@ -0,0 +1,11 @@
+import std/terminal
+
+let isTty = stdout.isatty
+
+proc prnt*(what: string) =
+  ## Writes to stdout.
+  ## If the stdout is a tty, appends a newline.
+  ## Otherwise, no newline is inserted.
+  stdout.write what
+  if isTty: stdout.write "\n"
+  stdout.flushFile

src/randchars.nim

@@ -1,4 +1,5 @@
-import std/[os, random, strutils]
+import std/[os, random, strutils, sugar]
+import lib/prnt
 
 const selection = Digits + Letters
 
@@ -10,8 +11,8 @@ let
 
 randomize()
 
-# todo: write helper proc that only writes newline if it's a tty
-for _ in 0 ..< length:
-  stdout.write selection.sample
+let res = collect:
+  for _ in 0 ..< length:
+    selection.sample
 
-stdout.flushFile
+prnt cast[string](res)