add iterm2 shell integration

.iterm2/imgls

@@ -0,0 +1,68 @@
+#!/bin/bash
+# tmux requires unrecognized OSC sequences to be wrapped with DCS tmux;
+# <sequence> ST, and for all ESCs in <sequence> to be replaced with ESC ESC. It
+# only accepts ESC backslash for ST.
+function print_osc() {
+    if [ x"$TERM" = "xscreen" ] ; then
+        printf "\033Ptmux;\033\033]"
+    else
+        printf "\033]"
+    fi
+}
+
+# More of the tmux workaround described above.
+function print_st() {
+    if [ x"$TERM" = "xscreen" ] ; then
+        printf "\a\033\\"
+    else
+        printf "\a"
+    fi
+}
+
+function list_file() {
+  fn=$1
+  dims=$(php -r 'if (!is_file($argv[1])) exit(1); $a = getimagesize($argv[1]); if ($a==FALSE) exit(1); else { echo $a[0] . "x" .$a[1]; exit(0); }' "$fn")
+  rc=$?
+  if [[ $rc == 0 ]] ; then
+    print_osc
+    printf '1337;File=name='`echo -n "$fn" | base64`";"
+    wc -c "$fn" | awk '{printf "size=%d",$1}'
+    printf ";inline=1;height=3;width=3;preserveAspectRatio=true"
+    printf ":"
+    base64 < "$fn"
+    print_st
+    if [ x"$TERM" == "xscreen" ] ; then
+      # This works in plain-old tmux but does the wrong thing in iTerm2's tmux
+      # integration mode. tmux doesn't know that the cursor moves when the
+      # image code is sent, while iTerm2 does. I had to pick one, since
+      # integration mode is undetectable, so I picked the failure mode that at
+      # least produces useful output (there is just too much whitespace in
+      # integration mode). This could be fixed by not moving the cursor while
+      # in integration mode. A better fix would be for tmux to interpret the
+      # image sequence, though.
+      #
+      # tl;dr: If you use tmux in integration mode, replace this with the printf
+      # from the else clause.
+      printf '\033[4C\033[Bx'
+    else
+      printf '\033[A'
+    fi
+    echo -n "$dims "
+    ls -ld "$fn"
+  else
+    ls -ld "$fn"
+  fi
+}
+
+if [ $# -eq 0 ]; then
+  for fn in *
+  do
+     list_file "$fn"
+  done < <(ls -ls)
+else
+  for fn in "$@"
+  do
+     list_file "$fn"
+  done
+fi
+