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#!/usr/bin/perl
# dwim (do what i mean) is my own plan9-like plumber
use v5.24;
use warnings;
use strict;
use subs qw/arguments dir env fail handle path run/;
my ($DEBUG, $handler, $phrase);
while ($_ = shift @ARGV) {
if (/^-d$/) {
$DEBUG = 1;
} elsif (/^-/) {
die "usage: $0 [-d] [phrase]\n";
} else {
$phrase = $_;
}
}
$phrase = `xsel -o` if not defined $phrase;
my @OPENER = ('xtopen');
my @EDITOR = (@OPENER, 'vi');
my @PDF_VIEWER = ('xpdf');
my @MAN_VIEWER = (@OPENER, 'man');
my @MAILER = (@OPENER, 'mutt');
my @BROWSER = (@OPENER, 'w3m -title');
my @FILE_BROWSER = ('rox');
my @MAILDIR_VIEWER = (@OPENER, 'mutt -f');
my $MAILROOT = env MAILROOT => '/home/john/mail/';
for ($phrase) {
if (/^(https?:\/?\/?\S+)$/) {
handle 'web address';
run @BROWSER, $1
}
if (/^(mailto:\S+)$/ or /^(\S+@.+\.\w+)$/) {
handle 'e-mail address';
run @MAILER, $1
}
if (/^(.+?):(\d+).*?$/) {
handle 'file:line (like grep -n)';
my $p = path $1;
run @EDITOR, "+$2", $p
}
if (/^(.+) line (\d+)\.?$/) {
handle 'FILE line LINE (like perl)';
my $p = path $1;
run @EDITOR, "+$2", $p
}
if (/^(.+):(.+)$/) {
handle 'file:query (like grep)';
my $p = path $1;
run @EDITOR, "+/$2", $p if -e $p;
fail 'file not found' if $DEBUG;
# otherwise fall through
}
if (/^([-_A-Za-z]+)\((\d+)\)[):,.]*$/) {
handle 'manual(section)';
run @MAN_VIEWER, $2, $1;
}
if (/^([-_A-Za-z]+)\.([1-9])$/) {
handle 'manual.section';
my $p = path "$1.$2";
run @MAN_VIEWER, $p if -e $p;
run @MAN_VIEWER, $2, $1;
}
if (/^([A-Za-z_][A-Za-z0-9_]*)\(/) {
handle 'function(call';
my $dir = dir;
s/\(.*//;
for (`grep -n '^$_' "$dir"/*.c "$dir"/*.h`) {
run @EDITOR, "+$2", $1 if /([^:]+):(\d+):/;
}
}
if (/^<(\S+)>$/) {
handle '<header.h>';
open my $h, 'find / -maxdepth 3 -type d -name include 2>&-|'
or fail 'could not search include directories';
while (<$h>) {
chomp;
if (-e "$_/$1") {
close $h;
run @EDITOR, "$_/$1";
}
}
close $h;
fail 'header file not found';
}
if (/^(\S+)$/) {
handle 'maildir / directory / file';
my $p = path $1;
run @MAILDIR_VIEWER, $p if $p =~ /^$MAILROOT/; # maildir
run @FILE_BROWSER, $p if -d $p; # directory
run @PDF_VIEWER, $p if -e $p and $p =~ /\.pdf$/; # pdf
run @EDITOR, $p if -e $p; # file
fail 'file not found' if $DEBUG;
# otherwise fall through
}
# otherwise
die "no handler matched by: $phrase\n"
}
sub dir {
for (`xtitle`) {
chomp;
s/.*\(([^(]+)\)$/$1/;
s,^~([^/]+),/home/$1,;
s,^~,/home/$ENV{USER},;
die "couldn't retrieve current directory\n"
if ! -d $_ and ! -d ($_ = dirname($_));
return $_;
}
die "couldn't retrieve current directory: xtitle not installed\n";
}
sub path {
my $n = shift;
$n =~ s,^~([^/]+),/home/$1,;
$n =~ s,^~,/home/$ENV{USER},;
return $n if $n =~ /^\// or $n =~ /^~/;
return dir . "/$n";
}
# take K => V and return environment variable K if defined, otherwise V
sub env {
my %h = @_;
my $k = (keys %h)[0];
return $ENV{$k} if defined ${ENV}{$k};
return $h{$k};
}
sub handle {
$handler = shift;
print STDERR "$handler MATCHED\n" if $DEBUG;
}
sub fail {
my $msg = shift;
print STDERR "$handler FAILED: $msg\n";
}
sub run {
if ($DEBUG) {
my @argv = @_;
s/(\s)/\\$1/g for @argv; # escape whitespace
print STDERR "@argv\n";
}
system "@_ &";
exit;
}
sub dirname {
my $path = shift;
$path =~ s,/[^/]+,,;
return $path;
}
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