Add clipcopy() and clippaste() generic cross-platform CLI clipboard functions.

Change copydir, copyfile, and coffee plugins to use them, instead of the Mac-only `pbcopy` command.

lib/clipboard.zsh

+# System clipboard integration
+#
+# This file has support for doing system clipboard copy and paste operations
+# from the command line in a generic cross-platform fashion.
+#
+# On OS X and Windows, the main system clipboard or "pasteboard" is used. On other
+# Unix-like OSes, this considers the X Windows CLIPBOARD selection to be the
+# "system clipboard", and the X Windows `xclip` command must be installed.
+
+# clipcopy - Copy data to clipboard
+#
+# Usage:
+#
+#  <command> | clipcopy    - copies stdin to clipboard
+#
+#  clipcopy <file>         - copies a file's contents to clipboard
+#
+function clipcopy() {
+  emulate -L zsh
+  local file=$1
+  if [[ $OSTYPE == darwin* ]]; then
+    if [[ -z $file ]]; then
+      pbcopy
+    else
+      cat $file | pbcopy
+    fi
+  elif [[ $OSTYPE == cygwin* ]]; then
+    if [[ -z $file ]]; then
+      cat > /dev/clipboard
+    else
+      cat $file > /dev/clipboard
+    fi
+  else
+    which xclip &>/dev/null
+    if [[ $? != 0 ]]; then
+      print "clipcopy: Platform $OSTYPE not supported or xclip not installed" >&2
+      return 1
+    fi
+    if [[ -z $file ]]; then
+      xclip -in -selection clipboard
+    else
+      xclip -in -selection clipboard $file
+    fi
+  fi
+}
+
+# clippaste - "Paste" data from clipboard to stdout
+#
+# Usage:
+#
+#   clippaste   - writes clipboard's contents to stdout
+#
+function clippaste() {
+  emulate -L zsh
+  if [[ $OSTYPE == darwin* ]]; then
+    pbpaste
+  elif [[ $OSTYPE == cygwin* ]]; then
+    cat /dev/clipboard
+  else
+    which xclip &>/dev/null 
+    if [[ $? != 0 ]]; then
+      print "clipcopy: Platform $OSTYPE not supported or xclip not installed" >&2
+      return 1
+    fi
+    xclip -out -selection clipboard
+  fi
+}
\ No newline at end of file

plugins/coffee/coffee.plugin.zsh

@@ -6,11 +6,11 @@ cf () {
 }
 # compile & copy to clipboard
 cfc () {
-  cf $1 | pbcopy
+  cf $1 | clipcopy
 }
 
-# compile from pasteboard & print
-alias cfp='coffeeMe "$(pbpaste)"'
+# compile from clipboard & print
+alias cfp='coffeeMe "$(clippaste)"'
 
-# compile from pasteboard and copy to clipboard
-alias cfpc='cfp | pbcopy'
+# compile from clipboard and copy to clipboard
+alias cfpc='cfp | clipcopy'

plugins/copydir/copydir.plugin.zsh

+# Copies the pathname of the current directory to the system or X Windows clipboard
 function copydir {
-  pwd | tr -d "\r\n" | pbcopy
+  emulate -L zsh
+  print -n $PWD | clipcopy
 }
\ No newline at end of file

plugins/copyfile/copyfile.plugin.zsh

+# Copies the contents of a given file to the system or X Windows clipboard
+#
+# copyfile <file>
 function copyfile {
-  [[ "$#" != 1 ]] && return 1
-  local file_to_copy=$1
-  cat $file_to_copy | pbcopy
+  emulate -L zsh
+  clipcopy $1
 }