mirror of
git://git.code.sf.net/p/zsh/code
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341 lines
10 KiB
Perl
Executable File
341 lines
10 KiB
Perl
Executable File
#!/usr/local/bin/perl -w
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#
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# ``Wee have also Shelles, thee Lyke of whych you knowe not, wherein
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# thee User may with thee merest Presse of thee Tabbe-Keye expande
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# or compleat al Maner of Wordes and such-like Diversities.''
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# - Francis Bacon, `New Atlantis' (or not).
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#
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# Convert tcsh "complete" statements to zsh "compctl" statements.
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# Runs as a filter. Should ignore anything which isn't a "complete".
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# It expects each "complete" statement to be the first thing on a line.
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# All the examples in the tcsh manual give sensible results.
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# Author: Peter Stephenson <pws@ibmth.df.unipi.it>
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#
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# Option:
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# -x (exact): only applies in the case of command disambiguation (is
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# that really a word?) If you have lines like
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# complete '-co*' 'p/0/(compress)'
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# (which makes co<TAB> always complete to `compress') then the
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# resulting "compctl" statements will produce one of two behaviours:
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# (1) By default (like tcsh), com<TAB> etc. will also complete to
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# "compress" and nothing else.
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# (2) With -x, com<TAB> does ordinary command completion: this is
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# more flexible.
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# I don't understand what the hyphen in complete does and I've ignored it.
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#
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# Notes:
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# (1) The -s option is the way to do backquote expansion. In zsh,
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# "compctl -s '`users`' talk" works (duplicates are removed).
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# (2) Complicated backquote completions should definitely be rewritten as
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# shell functions (compctl's "-K func" option). Although most of
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# these will be translated correctly, differences in shell syntax
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# are not handled.
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# (3) Replacement of $:n with the n'th word on the current line with
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# backquote expansion now works; it is not necessarily the most
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# efficient way of doing it in any given case, however.
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# (4) I have made use of zsh's more sophisticated globbing to change
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# things like ^foo.{a,b,c,d} to ^foo.(a|b|c|d), which works better.
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# It's just possible in some cases you may want to change it back.
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# (5) Make sure all command names with wildcards are processed together --
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# they need to be lumped into one "compctl -C" or "compctl -D"
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# statement for zsh.
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# (6) Group completion (complete's g flag) is not built into zsh, so
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# you need perl to be available to generate the groups. If this
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# script is useful, I assume that's not a problem.
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# (7) I don't know what `completing completions' means, so the X
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# flag to complete is not handled.
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# Handle options
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if (@ARGV) {
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($ARGV[0] eq '-x') && shift && ($opt_x = 1);
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($ARGV[0] =~ /^-+$/) && shift;
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}
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# Function names used (via magic autoincrement) when cmdline words are needed
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$funcnam = 'compfn001';
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# Read next word on command line
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sub getword {
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local($word, $word2, $ret);
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($_) = /^\s*(.*)$/;
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while ($_ =~ /^\S/) {
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if (/^[\']/) {
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($word, $_) = /^\'([^\']*).(.*)$/;
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} elsif (/^[\"]/) {
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($word, $_) = /^\"([^\"]*).(.*)$/;
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while ($word =~ /\\$/) {
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chop($word);
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($word2, $_) = /^([^\"]*).(.*)$/;
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$word .= '"' . $word2;
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}
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} elsif (/\S/) {
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($word, $_) = /^([^\s\\\'\"\#;]*)(.*)$/;
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# Backslash: literal next character
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/^\\(.)/ && (($word .= substr($_,1,1)),
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($_ = substr($_,2)));
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# Rest of line quoted or end of command
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/^[\#;]/ && ($_ = '');
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} else {
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return undef;
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}
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length($word) && ($ret = defined($ret) ? $ret . $word : $word);
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}
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$ret;
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}
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# Interpret the x and arg in 'x/arg/type/'
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sub getpat {
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local($pat,$arg) = @_;
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local($ret,$i);
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if ($pat eq 'p') {
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$ret = "p[$arg]";
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} elsif ($pat eq 'n' || $pat eq 'N') {
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$let = ($arg =~ /[*?|]/) ? 'C' : 'c';
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$num = ($pat eq 'N') ? 2 : 1;
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$ret = "${let}[-${num},$arg]";
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} elsif ($pat eq 'c' || $pat eq 'C') {
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# A few tricks to get zsh to ignore up to the end of
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# any matched pattern.
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if (($pat eq 'c' && $arg =~ /^\*([^*?]*)$/)) {
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$ret = "n[-1,$1]";
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} elsif ($arg =~ /[*?]([^*?]*)$/) {
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length($1) && ($ret = " n[-1,$1]");
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$ret = "C[0,$arg] $ret";
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} else {
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$let = ($pat eq 'c') ? 's' : 'S';
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$ret = "${let}[$arg]";
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}
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}
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$ret =~ s/'/'\\''/g;
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$ret;
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}
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# Interpret the type in 'x/arg/type/'
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sub gettype {
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local ($_) = @_;
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local($qual,$c,$glob,$ret,$b,$m,$e,@m);
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$c = substr($_,0,1);
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($c =~ /\w/) && (substr($_,1,1) eq ':') && ($glob = substr($_,2));
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# Nothing (n) can be handled by returning nothing. (C.f. King Lear, I.i.)
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if ($c =~ /[abcjuv]/) {
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$ret = "-$c";
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} elsif ($c eq 'C') {
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if (defined($glob)) {
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$ret = "-W $glob -/g '*(.*)'";
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undef($glob);
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} else {
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$ret = '-c';
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}
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} elsif ($c eq 'S') {
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$ret = '-k signals';
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} elsif ($c eq 'd') {
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if (defined($glob)) {
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$qual = '-/';
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} else {
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$ret = '-/';
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}
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} elsif ($c eq 'D') {
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if (defined($glob)) {
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$ret = "-W $glob -/";
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undef($glob);
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} else {
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$ret = '-/';
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}
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} elsif ($c eq 'e') {
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$ret = '-E';
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} elsif ($c eq 'f' && !$glob) {
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$ret = '-f';
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} elsif ($c eq 'F') {
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if (defined($glob)) {
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$ret = "-W $glob -f";
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undef($glob);
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} else {
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$ret = '-f';
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}
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} elsif ($c eq 'g') {
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$ret = "-s '\$(perl -e '\\''while ((\$name) = getgrent)\n" .
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"{ print \$name, \"\\n\"; }'\\'')'";
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} elsif ($c eq 'l') {
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$ret = q!-k "(`limit | awk '{print $1}'`)"!;
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} elsif ($c eq 'p') {
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$ret = "-W $glob -f", undef($glob) if defined($glob);
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} elsif ($c eq 's') {
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$ret = '-p';
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} elsif ($c eq 't') {
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$qual = '.';
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} elsif ($c eq 'T') {
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if (defined($glob)) {
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$ret = "-W $glob -g '*(.)'";
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undef($glob);
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} else {
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$ret = "-g '*(.)'";
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}
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} elsif ($c eq 'x') {
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$glob =~ s/'/'\\''/g;
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$ret = "-X '$glob'";
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undef($glob);
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} elsif ($c eq '$') { # '){
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$ret = "-k " . substr($_,1);
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} elsif ($c eq '(') {
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s/'/'\\''/g;
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$ret = "-k '$_'";
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} elsif ($c eq '`') {
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# this took some working out...
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if (s/\$:(\d+)/$foo=$1+1,"\${word[$foo]}"/ge) {
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$ret = "-K $funcnam";
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$genfunc .= <<"HERE";
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function $funcnam {
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local word
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read -cA word
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reply=($_)
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}
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HERE
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$funcnam++;
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} else {
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s/'/'\\''/g;
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$ret = "-s '$_'";
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}
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}
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# foo{bar,ba,blak,sheap} -> foo(bar|ba|blak|sheap).
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# This saves a lot of mess, since in zsh brace expansion occurs
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# before globbing. I'm sorry, but I don't trust $` and $'.
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while (defined($glob) && (($b,$m,$e) = ($glob =~ /^(.*)\{(.*)\}(.*)$/))
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&& $m =~ /,/) {
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@m = split(/,/, $m);
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for ($i = 0; $i < @m; $i++) {
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while ($m[$i] =~ /\\$/) {
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substr($m[$i],-1,1) = "";
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splice(@m,$i,2,"$m[$i]\\,$m[$i+1]");
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}
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}
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$glob = $b . "(" . join('|',@m) . ")" . $e;
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}
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if ($qual) {
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$glob || ($glob = '*');
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$glob .= "($qual)";
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}
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$glob && (($glob =~ s/'/'\\''/g),($glob = "-g '$glob'"));
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defined($ret) && defined($glob) && ($ret .= " $glob");
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defined($ret) ? $ret : $glob;
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}
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# Quoted array separator for extended completions
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$" = " - ";
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while (<>) {
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if (/^\s*complete\s/) {
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undef(@stuff);
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$default = '';
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$_ = $';
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while (/\\$/) {
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# Remove backslashed newlines: in principle these should become
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# real newlines inside quotes, but what the hell.
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($_) = /^(.*)\\$/;
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$_ .= <>;
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}
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$command = &getword;
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if ($command =~ /^-/ || $command =~ /[*?]/) {
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# E.g. complete -co* ...
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$defmatch = $command;
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($defmatch =~ /^-/) && ($defmatch = substr($defmatch,1));
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} else {
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undef($defmatch);
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}
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while (defined($word = &getword)) {
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# Loop over remaining arguments to "complete".
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$sep = substr($word,1,1);
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$sep =~ s/(\W)/\\$1/g;
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@split = split(/$sep/,$word,4);
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for ($i = 0; $i < 3; $i++) {
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while ($split[$i] =~ /\\$/) {
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substr($split[$i],-1,1) = "";
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splice(@split,$i,2,"$split[$i]\\$sep$split[$i+1]");
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}
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}
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($pat,$arg,$type,$suffix) = @split;
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defined($suffix) && ($suffix =~ /^\s*$/) && undef($suffix);
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if (($word =~ /^n$sep\*$sep/) &&
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(!defined($defmatch))) {
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# The "complete" catch-all: treat this as compctl\'s
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# default (requiring no pattern matching).
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$default .= &gettype($type) . ' ';
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defined($suffix) &&
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(defined($defsuf) ? ($defsuf .= $suffix)
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: ($defsuf = $suffix));
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} else {
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$pat = &getpat($pat,$arg);
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$type = &gettype($type);
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if (defined($defmatch)) {
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# The command is a pattern: use either -C or -D option.
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if ($pat eq 'p[0]') {
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# Command word (-C): 'p[0]' is redundant.
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if ($defmatch eq '*') {
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$defcommand = $type;
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} else {
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($defmatch =~ /\*$/) && chop($defmatch);
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if ($opt_x) {
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$c = ($defmatch =~ /[*?]/) ? 'C' : 'c';
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$pat = $c . "[0,${defmatch}]";
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} else {
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$pat = ($defmatch =~ /[*?]/) ?
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"C[0,${defmatch}]" : "S[${defmatch}]";
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}
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push(@commandword,defined($suffix) ?
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"'$pat' $type -S '$suffix'" : "'$pat' $type");
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}
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} elsif ($pat eq "C[-1,*]") {
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# Not command word completion, but match
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# command word (only)
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if ($defmatch eq "*") {
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# any word of any command
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$defaultdefault .= " $type";
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} else {
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$pat = "W[0,$defmatch]";
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push(@defaultword,defined($suffix) ?
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"'$pat' $type -S '$suffix'" : "'$pat' $type");
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}
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} else {
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# Not command word completion, but still command
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# word with pattern
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($defmatch eq '*') || ($pat = "W[0,$defmatch] $pat");
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push(@defaultword,defined($suffix) ?
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"'$pat' $type -S '$suffix'" : "'$pat' $type");
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}
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} else {
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# Ordinary command
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push(@stuff,defined($suffix) ?
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"'$pat' $type -S '$suffix'" : "'$pat' $type");
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}
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}
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}
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if (!defined($defmatch)) {
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# Ordinary commands with no pattern
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print("compctl $default");
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defined($defsuf) && print("-S '$defsuf' ") && undef($defsuf);
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defined(@stuff) && print("-x @stuff -- ");
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print("$command\n");
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}
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if (defined($genfunc)) {
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print $genfunc;
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undef($genfunc);
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}
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}
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}
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(defined(@commandword) || defined($defcommand)) &&
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print("compctl -C ",
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defined($defcommand) ? $defcommand : '-c',
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defined(@commandword) ? " -x @commandword\n" : "\n");
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if (defined($defaultdefault) || defined(@defaultword)) {
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defined($defaultdefault) || ($defaultdefault = "-f");
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print "compctl -D $defaultdefault";
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defined(@defaultword) && print(" -x @defaultword");
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print "\n";
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}
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__END__
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