scripts: add zsh.pl for generating zsh completion

1 files changed, 77 insertions, 0 deletions

diff --git a/scripts/zsh.pl b/scripts/zsh.pl
new file mode 100755
index 000000000..7520a15a6
--- /dev/null
+++ b/scripts/zsh.pl
@@ -0,0 +1,77 @@
+#!/usr/bin/perl
+
+# Generate ZSH completion
+
+use strict;
+use warnings;
+
+my $curl = $ARGV[0] || 'curl';
+
+my $regex = '\s+(?:(-[^\s]+),\s)?(--[^\s]+)\s([^\s.]+)?\s+(.*)';
+my @opts = parse_main_opts('--help', $regex);
+
+my $opts_str;
+
+$opts_str .= qq{  $_ \\\n} foreach (@opts);
+chomp $opts_str;
+
+my $tmpl = <<"EOS";
+#compdef curl
+
+# curl zsh completion
+
+local curcontext="\$curcontext" state state_descr line
+typeset -A opt_args
+
+local rc=1
+
+_arguments -C -S \\
+$opts_str
+  '*:URL:_urls' && rc=0
+
+return rc
+EOS
+
+print $tmpl;
+
+sub parse_main_opts {
+    my ($cmd, $regex) = @_;
+
+    my @list;
+    my @lines = split /\n/, `"$curl" $cmd`;
+
+    foreach my $line (@lines) {
+        my ($short, $long, $arg, $desc) = ($line =~ /^$regex/) or next;
+
+        my $option = '';
+
+        $desc =~ s/'/''/g if defined $desc;
+        $desc =~ s/\[/\\\[/g if defined $desc;
+        $desc =~ s/\]/\\\]/g if defined $desc;
+
+        $option .= '{' . trim($short) . ',' if defined $short;
+        $option .= trim($long)  if defined $long;
+        $option .= '}' if defined $short;
+        $option .= '\'[' . trim($desc) . ']\'' if defined $desc;
+
+        $option .= ":$arg" if defined $arg;
+
+        $option .= ':_files'
+            if defined $arg and ($arg eq 'FILE' || $arg eq 'DIR');
+
+        push @list, $option;
+    }
+
+    # Sort longest first, because zsh won't complete an option listed
+    # after one that's a prefix of it.
+    @list = sort {
+        $a =~ /([^=]*)/; my $ma = $1;
+        $b =~ /([^=]*)/; my $mb = $1;
+
+        length($mb) <=> length($ma)
+    } @list;
+
+    return @list;
+}
+
+sub  trim { my $s = shift; $s =~ s/^\s+|\s+$//g; return $s };