vipe

   1 #!/usr/bin/perl
   2
   3 =head1 NAME
   4
   5 vipe - edit pipe
   6
   7 =head1 SYNOPSIS
   8
   9 command1 | vipe | command2
  10
  11 =head1 DESCRIPTION
  12
  13 vipe allows you to run your editor in the middle of a unix pipeline and
  14 edit the data that is being piped between programs. Your editor will
  15 have the full data being piped from command1 loaded into it, and when you
  16 close it, that data will be piped into command2.
  17
  18 =head1 ENVIRONMENT VARIABLES
  19
  20 =over 4
  21
  22 =item EDITOR
  23
  24 Editor to use.
  25
  26 =item VISUAL
  27
  28 Also supported to determine what editor to use.
  29
  30 =back
  31
  32 =head1 AUTHOR
  33
  34 Copyright 2006 by Joey Hess <id@joeyh.name>
  35
  36 Licensed under the GNU GPL.
  37
  38 =cut
  39
  40 use warnings;
  41 use strict;
  42 use File::Temp q{tempfile};
  43
  44 $/=undef;
  45
  46 my ($fh, $tmp)=tempfile(UNLINK => 1);
  47 die "cannot create tempfile" unless $fh;
  48 print ($fh <STDIN>) || die "write temp: $!";
  49 close $fh;
  50 close STDIN;
  51 open(STDIN, "</dev/tty") || die "reopen stdin: $!";
  52 open(OUT, ">&STDOUT") || die "save stdout: $!";
  53 close STDOUT;
  54 open(STDOUT, ">/dev/tty") || die "reopen stdout: $!";
  55
  56 my @editor="vi";
  57 if (-x "/usr/bin/editor") {
  58         @editor="/usr/bin/editor";
  59 }
  60 if (exists $ENV{EDITOR}) {
  61         @editor=split(' ', $ENV{EDITOR});
  62 }
  63 if (exists $ENV{VISUAL}) {
  64         @editor=split(' ', $ENV{VISUAL});
  65 }
  66 my $ret=system(@editor, $tmp);
  67 if ($ret != 0) {
  68         die "@editor exited nonzero, aborting\n";
  69 }
  70
  71 open (IN, $tmp) || die "$0: cannot read $tmp: $!\n";
  72 print (OUT <IN>) || die "write failure: $!";
  73 close IN;