Start Emacs.app from CLI

Emacs_starter.pl

#!/usr/bin/perl

# Emacs starter for Emacs mac port

# Thanks to Aquamacs Project and David Reitter

my $args = "";
my $tmpfiles = "";

for my $f (@ARGV) {
  $args .= '"'.$f.'" ';
  $tmpfiles .= '"'.$f.'" ' if (! -e $f);
}

system("touch $args") if ($tmpfiles);
 
system("open -a /Applications/Emacs.app $args");

# delay deletion because AE drag&drop doesn't work with non-existing documents
system("(sleep 3; rm $tmpfiles) &") if ($tmpfiles);
 
exit;

I rewrote this as a shell script and added the capability to accommodate filenames with spaces:

#!/bin/sh

if [ -e '/Applications/Emacs.app' ]; then
  t=()

  if [ ${#@} -ne 0 ]; then
    while IFS= read -r file; do
      [ ! -f "$file" ] && t+=("$file") && /usr/bin/touch "$file"
      file=$(echo $(cd $(dirname "$file") && pwd -P)/$(basename "$file"))
      $(/usr/bin/osascript <<-END
        if application "Emacs.app" is running then
          tell application id (id of application "Emacs.app") to open POSIX file "$file"
        else
          tell application ((path to applications folder as text) & "Emacs.app")
            activate
            open POSIX file "$file"
          end tell
        end if
END
      ) &  # Note: END on the previous line may be indented with tabs but not spaces
    done <<<"$(printf '%s\n' "$@")"
  fi

  if [ ! -z "$t" ]; then
    $(/bin/sleep 10; for file in "${t[@]}"; do
      [ ! -s "$file" ] && /bin/rm "$file";
    done) &
  fi
else
  vim -No "$@"
fi

Since I switched from vi, I can't help but to type vi filename every time, so I saved this script as /usr/local/bin/vi. In the off chance I haven't yet installed Emacs.app, it uses the built in system vim instead.

Thanks @ptb :)

Sorry to ask guys, how can I install this?

@lmartins Paste into a file named emacs (or whatever you want the command to be) in a directory in your path (ahead of the location of the existing emacs command). Then chmod +x /path/to/emacs.