Fixing awk problem in OSX el capitan

command.sh

brew unlink gawk
brew reinstall awk
awk

history

─[email protected] ~/Projects/playground/swoole-src  ‹master*›
╰─➤  awk                                                                                         1 ↵
dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib
  Referenced from: /usr/local/bin/awk
  Reason: image not found
[1]    74534 trace trap  awk
─[email protected] ~/Projects/playground/swoole-src  ‹master*›
╰─➤  brew reinstall awk                                                                        133 ↵
==> Reinstalling homebrew/dupes/awk
Error: Cannot install homebrew/dupes/awk because conflicting formulae are installed.

  gawk: because both install awk executables.

Please `brew unlink gawk` before continuing.

Unlinking removes a formula's symlinks from /usr/local. You can
link the formula again after the install finishes. You can --force this
install, but the build may fail or cause obscure side-effects in the
resulting software.
╭─[email protected] ~/Projects/playground/swoole-src  ‹master*›
╰─➤  brew unlink gawk                                                                            1 ↵
Unlinking /usr/local/Cellar/gawk/4.1.4... 22 symlinks removed
╭─[email protected] ~/Projects/playground/swoole-src  ‹master*›
╰─➤  brew reinstall awk
==> Reinstalling homebrew/dupes/awk
==> Using the sandbox
==> Downloading https://www.cs.princeton.edu/~bwk/btl.mirror/awk.tar.gz
######################################################################## 100.0%
==> make CC=clang CFLAGS= YACC=yacc -d
🍺  /usr/local/Cellar/awk/20121220: 5 files, 159.4K, built in 8 seconds
╭─[email protected] ~/Projects/playground/swoole-src  ‹master*›
╰─➤  awk
usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]