Remove multi-threaded, interactive input functionality.

It didn't really work when reading from /dev/tty anyways, as the program
upstream from slfmt is probably also reading from /dev/tty and has
priority.

src/slfmt.nim

@@ -1,5 +1,5 @@
 import std/[atomics, json, options, os, posix, sequtils, setutils, strutils,
-            terminal, termios, times, unicode]
+            terminal, times, unicode]
 import cliutils, docopt, timeutils, zero_functional
 
 from std/logging import Level
@@ -128,63 +128,12 @@ const EXPECTATION_STYLES = [
   (ansiEscSeq(fg = cBrightWhite) & ansiEscSeq(bg = (r: 41, g: 84, b:98)))   # cyan
 ]
 
-var
-  controlChannel: Channel[CtrlCmd]
-  stopFlag: Atomic[bool]
+var stopFlag: Atomic[bool]
 
 
 proc handleSignal(sig: cint) {.noconv.} = stopFlag.store(true)
 
 
-proc stripAnsi*(text: string): string =
-  text.replace(FORMATTING_REGEX, "")
-
-
-proc initializeTTY(tty: File): Termios =
-  let ttyFd = tty.getFileHandle.cint
-
-  var mode: Termios = default(Termios)
-  if ttyFd.tcGetAttr(addr mode) != 0:
-    raise newException(Exception, "couldn't read TTY attributes")
-
-  result = mode
-
-  mode.c_iflag = mode.c_iflag and not Cflag(BRKINT or ICRNL or INPCK or
-      ISTRIP or IXON)
-  mode.c_cflag = (mode.c_cflag and not Cflag(CSIZE or PARENB)) or CS8
-  mode.c_lflag = (mode.c_lflag and not Cflag(ECHO or ICANON or IEXTEN)) or ISIG
-  mode.c_cc[VMIN] = 1.char
-  mode.c_cc[VTIME] = 0.char
-
-  if ttyFd.tcSetAttr(TCSANOW, addr mode) != 0:
-    raise newException(Exception, "couldn't set TTY attributes")
-
-
-proc restoreTTY(tty: File, ttyMode: var Termios) =
-  discard tcSetAttr(tty.getFileHandle.cint, TCSADRAIN, addr ttyMode)
-
-
-proc readTTYLoop() {.thread.} =
-  var tty: File
-  var ttyMode: Termios = default(Termios)
-  if not open(tty, "/dev/tty", fmRead) or not isatty(tty):
-    return # bail and don't worry about reading control characters
-
-  try:
-    ttyMode = initializeTTY(tty)
-    while not stopFlag.load():
-      let ch = tty.readChar()
-
-      case ch
-      of '\x12', 'r': controlChannel.send(ccReset) # Ctrl-R
-      of '\x04'     : controlChannel.send(ccQuit) # Ctrl-D
-      else: discard
-
-  finally:
-    restoreTTY(tty, ttyMode)
-    close(tty)
-
-
 func getOrFail(n: JsonNode, key: string): JsonNode =
   if not n.contains(key):
     raise newException(ValueError, "missing " & key &
@@ -447,8 +396,6 @@ proc eraseAndWriteLine(f: File, s: string) =
 
 when isMainModule:
 
-  var readerThread: Thread[void]
-
   try:
     let args = docopt(USAGE, version = VERSION)
 
@@ -467,13 +414,7 @@ when isMainModule:
     signal(SIGINT, handleSignal)
     signal(SIGTERM, handleSignal)
 
-    #[
-    open(controlChannel)
-    createThread(readerThread, readTTYLoop)
-    ]#
-
-    #stdout.hideCursor
-    #
+    stdout.hideCursor
     stdout.writeLine("") # burn a line
     var line: string = ""
     while stdin.readLine(line) and not stopFlag.load():
@@ -515,9 +456,6 @@ when isMainModule:
     quit(QuitFailure)
 
   finally:
-    stopFlag.store(true)
-    #close(controlChannel)
-    #joinThreads(readerThread)
     stdout.writeLine(RESET_FORMATTING)
     stdout.write(eraseLine(emAll))
     stdout.showCursor