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-rwxr-xr-xwpdf52
1 files changed, 32 insertions, 20 deletions
diff --git a/wpdf b/wpdf
index df9c71a..3a362ca 100755
--- a/wpdf
+++ b/wpdf
@@ -1,25 +1,37 @@
-#!/bin/sh
+#!/usr/bin/perl
-# wpdf -- view, watch and remake pdf
+# wpdf -- view, watch and remake pdf based on Makefile
-IFS='
-'
+use strict;
+use warnings;
-[ -z "$*" ] && { echo usage: $0 source-file ... 1>&2; exit 1; }
+my %deps;
-success=
-for source in "$@"; do
- case $source in
- *.pdf) echo skipping $source: already a pdf 1>&2 ;;
- *) success=1
- xpdf -remote wpdf-$source ${source%.*}.pdf & ;;
- esac
-done
+# collect dependencies for given pdf files
+for (@ARGV) {
+ if (/\.pdf$/) {
+ (my $name = $_) =~ s/\.pdf$//;
+ open my $f, '<', 'Makefile'
+ or die "could not open Makefile: $!\n";
+ while (<$f>) {
+ if (/^\Q$name.pdf\E:\s*(.*)/) {
+ $deps{$_} = $name for split /\s/, $1;
+ last;
+ }
+ }
+ close $f;
+ exec('xpdf', '-remote', "wpdf-$name", "$name.pdf") if fork == 0;
+ } else {
+ warn "skipping $_: not a pdf\n";
+ }
+}
-[ -z "$success" ] && exit 1
-xdotool search --sync --onlyvisible --class xpdf 1>&-
-sleep 0.2 || sleep 1
-
-watch -i "$@" | while read source; do
- make ${source%.*}.pdf && xpdf -remote wpdf-$source -reload
-done
+# make pdf on demand
+open my $p, '-|', 'watch', keys %deps
+ or die "could not start watch: $!\n";
+while (<$p>) {
+ chomp;
+ system('make', "$deps{$_}.pdf") == 0
+ && system('xpdf', '-remote', "wpdf-$deps{$_}", '-reload');
+}
+close $p;