3 # commitid.scad.pl - a program for annotating solid models with commit info
4 # Copyright (C)2016 Ian Jackson. See below. There is NO WARRANTY.
10 # .../commitid.scad.pl [OPTION...] [STRING...] >commitid.scad.new \
11 # && mv -f commitid.scad.new commitid.scad
13 # Run without arguments, commitid.scad.pl will output an openscad file
14 # which contains 2D and 3D models of the current git commit count and
15 # commit object id (commit hash), useful for identifying printed
18 # See below for details. You probably want these two sections, as a
19 # quick starting point:
20 # General form of provided openscad modules
23 # We can also generate models of short mainly-numeric strings
24 # specified on the command line.
29 # --git Generate git commit indications, as shown below
30 # (this is the default if no strings are requested with -t).
31 # Ie, produce the `Autoscaling modules' and `Specific layouts'.
34 # Generate git commit indication based on commit object only
35 # (ie avoid counting commits). Ie, do not generate `Small'
36 # and `Full' layouts (and never select them for `Best').
38 # -i Do not generate `+' dirty indication if git-untracked files
39 # are present (ie, missing .gitignore entries). The `*'
40 # dirty tree indication (for modified files) cannot be disabled.
43 # Generate a layout LAYOUT containing TEXT. TEXT can
44 # contain newlines (a final newline usually undesirable, as
45 # it will generate a blank line). If LAYOUT is not specified,
46 # generates Arg0, Arg1, Arg2, etc., for successive such
47 # TEXTs. The permissible character set in is TEXT is:
54 # Dynamic variables for configuration
55 # -----------------------------------
57 # We honour the following variables to control various scaling factors:
60 # $Commitid_pixelsz 0.8 \ multiplied together
61 # $Commitid_scale 1.0 /
62 # $Commitid_depth pixelsz/2 \ multiplied together
63 # $Commitid_depth_scale 1.0 /
64 # $Commitid_max_best_scale 2.0 limits XY scaling in *Best*
66 # FYI the font is nominally 3x5 pixels, with 1-pixel inter-line and
67 # inter-character gaps. (It's not strictly speaking a 3x5 bitmap
68 # font, size it contains partial pixels and diagonals.)
71 # Non-`module'-specific functions
72 # -------------------------------
74 # We provide the following functions (which depend on the config
75 # variables, but not on anything else) and compute useful values:
77 # function Commitid_pixelsz() Actual size of each nominal pixel
78 # function Commitid_depth() Depth to use (the amount characters
79 # should be raised or sunken)
81 # General form of provided openscad modules
82 # -----------------------------------------
84 # module Commitid_MODULE_2D(...) A collection of polygons forming characters
85 # module Commitid_MODULE(...) The above, extruded up and down in Z
86 # function Commitid_MODULE_sz() A 2-vector giving the X,Y size
88 # Except for *Best* modules, the XY origin is in the bottom left
89 # corner without any margin. Likewise Commitid_MODULE_sz does not
92 # For 3D versions, the model is 2*depth deep and the XY plane bisects
93 # the model. This means it's convenient to either add or subtract from
94 # a workpiece whose face is in the XY plane.
100 # These modules take a specification of the available XY space, and
101 # select and generate a suitable specific identification layout:
103 # module Commitid_BestCount_2D(max_sz, margin=Commitid_pixelsz())
104 # module Commitid_BestCount (max_sz, margin=Commitid_pixelsz())
105 # module Commitid_BestObjid_2D(max_sz, margin=Commitid_pixelsz())
106 # module Commitid_BestObjid (max_sz, margin=Commitid_pixelsz())
108 # max_sz should be [x,y].
110 # BestCount includes (as much as it can of) the git commit count,
112 # git rev-list --first-parent --count HEAD
113 # (and it may include some of the git revision ID too).
115 # BestObjid includes as much as it can of the git commit object hash,
116 # and never includes any of the count.
118 # All of these will autoscale and autorotate the selected model, and
119 # will include an internal margin of the specified size (by default,
120 # one pixel around each edge). If no margin is needed, pass margin=0.
122 # There are no `function Commitid_Best*_sz'. If they existed they
123 # would simply return max_sz.
129 # In general the output, although it may be over multiple lines,
130 # is always in this order
131 # git commit object id (hash)
135 # Not all layouts have all these parts. The commit object id may
136 # sometimes be split over multiple lines, but the count will not be.
137 # If both commit id and commit count appear they will be separated
138 # by (at least) a newline, or a dirty indicator, or a space.
140 # The commit id is truncated to fit, from the right.
142 # The commit count is truncated from the _left_, leaving the least
143 # significant decimal digits.
145 # The dirty indicator can be
147 # * meaning the working tree contains differences from HEAD
149 # + meaning the working tree contains untracked files
150 # (ie files you have failed to `git add' and also failed
151 # to add to gitignore). (But see the -i option.)
157 # If you want to control the exact layout (and make space for it in
158 # your design), you can use these:
160 # module Commitid_LAYOUT_2D()
161 # module Commitid_LAYOUT()
162 # function Commitid_LAYOUT_sz()
164 # Here LAYOUT is one of the following (giving for example, `module
165 # Commitid_Full8_2D'). In the examples, we will assume that the tree
166 # is dirty, the commit count is 123456, and the commit object id
167 # starts abcdeffedbcaabcdef... In the examples `_' shows where a
168 # space would be printed.
170 # Small2 Small3 ... Small10
171 # A single line containing as much of the count will fit, eg:
174 # The objectid is included if more than one character of of it
175 # will fit without makign the output ambiguous:
178 # Small2S Small4S ... Small10S
180 # Same as Small but split into two lines (S)
181 # or three lines (T). Eg:
182 # Small4S *4 Small6T _*
185 # Git2 Git3 ... Git10
186 # Git4S Git6S ... Git10S
188 # Just the commit object hash, in one, two (S) or three (T)
192 # Full4 Full6 ... Full20:
193 # The commit object hash plus the commit count, on
194 # separate lines, eg:
195 # Full6 abcdef Full8 abcdeffe
198 # Full6T Full9T ... Full30T
199 # As Full but the commit object id is split over two lines
200 # producing a 3-line layout, eg:
201 # Full9T abc Full21T abcdeff
210 # A demonstration of the built-in 18-character font
214 # Strings passed on command line (without -t, or bare -t,
215 # rather than with -tLAYOUT).
219 # Generated by passing -tLAYOUT on the command line.
225 $SIG{__WARN__} = sub { die @_; };
227 sub p { print @_ or die $!; }
230 // *** AUTOGENERATED - DO NOT EDIT *** //
231 function Commitid_pixelsz() =
232 ($Commitid_pixelsz ? $Commitid_pixelsz : 0.8) *
233 ($Commitid_scale ? $Commitid_scale : 1.0);
234 function Commitid_depth() =
235 ($Commitid_depth ? $Commitid_depth : Commitid_pixelsz()/2) *
236 ($Commitid_depth_scale ? $Commitid_depth_scale : 1.0);
237 function Commitid__scale() =
238 Commitid_pixelsz() / 0.2;
243 my $chrx = sprintf '%#x', ord $chr;
244 return "Commitid__chr_$chrx";
247 our $gtm_demo_i = -1;
251 sub gentextmodule_demo_start_batch () {
256 sub gen3dmodule ($@) {
257 my ($modb,@argl) = (@_);
258 p "module ${modb}(".(join ', ', @argl)."){\n";
259 p " d=Commitid_depth();\n";
260 p " translate([0,0,-d]) linear_extrude(height=d*2)\n";
261 p " ${modb}_2D(".(join ',', map { m/=/ ? $` : $_ } @argl).");\n";
265 sub gentextmodule ($@) {
266 my ($form, @lines) = @_;
267 my $modb = "Commitid_$form";
268 p "module ${modb}_2D(){\n";
269 p " // |$_|\n" foreach @lines;
270 p " scale(Commitid__scale()){\n";
273 foreach my $line (@lines) {
276 foreach my $chr (split //, $line) {
277 p sprintf " translate([%d * 0.8, %d * 1.2]) %s();\n",
278 $x, $y, chrmodname $chr
282 $cols = $x if $x > $cols;
288 p sprintf "function %s_sz() = Commitid__scale() * 0.1 * [ %d, %d ];\n",
289 $modb, 2 * ($cols * 4 - 1), 2 * (@lines * 6 - 1);
291 push @gtm_demo_o, <<END;
292 translate([$gtm_demo_i * st[0], $gtm_demo_j * st[1]]) {
294 color("blue") translate([-e,-e]) square(${modb}_sz() + 2*[e,e]);
295 square(${modb}_sz());
309 last if %cellmap && !m/\S/;
319 my @chrs = split / /, $_;
320 <DATA> !~ m/\S/ or die;
321 foreach my $row (reverse 0..4) {
332 foreach my $chr (@chrs) {
333 s{^ }{} or die "$chr $_ ?";
334 foreach my $col (0..2) {
338 my $f = $cellmap{$&};
340 $f =~ s/\b\d/ sprintf '%05d', $col*2000 + $&*1025 /ge;
341 $f =~ s/\d\b/ sprintf '%05d', $row*2000 + $&*1025 /ge;
342 push @{ $chrpolys{$chr} }, [ split / /, $f ];
354 foreach my $chr (sort keys %chrpolys) {
355 my $mod = chrmodname $chr;
356 p "module $mod () {\n";
357 foreach my $poly (@{ $chrpolys{$chr} }) {
360 foreach my $pt (@$poly) {
362 $pt =~ s{\d{5}}{$&,};
363 $pt =~ s{\b\d}{$&.}g;
372 @demo = reverse $demo =~ m{.{1,$democols}}go;
377 our $do_git; # contains may chars 'c' (count) and/or 'o' (object)
378 our $do_git_untracked = 1;
383 sub rjustt ($$;$) { # right justify and truncate (ie, pad and truncate at left)
384 # always includes prefix
385 my ($sz, $whole, $prefix) = @_;
387 my $lw = length $whole;
388 my $spare = $sz - $lw - (length $prefix);
390 ($spare > 0 ? (' ' x $spare) : '').
392 substr($whole, ($spare < 0 ? -$spare : 0));
396 my ($sz, $whole, $suffix) = @_;
398 $sz -= length $suffix;
399 return sprintf "%-${sz}.${sz}s%s", $whole, $suffix;
403 my ($form, @lines) = @_;
404 gentextmodule($form, @lines);
407 Chars => (length join '', @lines),
408 Lines => (scalar @lines),
409 Ambiguous => ($form =~ m/Full/ && !grep { m/\W/ } @lines),
414 sub genform_q ($$$) {
415 my ($form, $s, $lines) = @_;
418 return if $l % $lines;
422 genform($form, $s =~ m/.{$e}/g);
425 sub genform_plusq ($$) {
428 genform_q("${form}S", $s, 2);
429 genform_q("${form}T", $s, 3);
434 sub gitrun_start () {
435 open F, "-|", @gcmd or die "$gcmd[0]: start: $!";
438 sub gitrun_done (;$) {
444 die "@gcmd failed ($?)\n";
448 (@gcmd) = (qw(git), @_);
452 defined or die "@gcmd produced no output";
453 chomp or die "@gcmd produced no final newline";
458 return unless $do_git;
460 @gcmd = qw(git status --porcelain);
461 push @gcmd, qw(--untracked=no) unless $do_git_untracked;
466 if (m/^\?\?/ && $do_git_untracked) {
473 gitrun_done($git_dirty eq '*');
478 if ($do_git =~ m/c/) {
479 $git_count = gitoutput qw(rev-list --first-parent --count HEAD);
481 if ($do_git =~ m/o/) {
482 $git_object = gitoutput qw(rev-parse HEAD);
485 foreach my $sz (2..10) {
486 gentextmodule_demo_start_batch();
488 if (defined($git_count)) {
489 my $smallstr = rjustt($sz, $git_count, $git_dirty);
490 if (defined($git_object) && $sz >= length($git_count) + 3) {
491 $smallstr = $git_object;
492 $smallstr .= ($git_dirty || ' ');
493 $smallstr .= $git_count;
494 $smallstr = rjustt($sz, $smallstr);
496 genform_plusq("Small$sz", $smallstr);
499 genform_plusq("Git$sz", ljustt($sz, $git_object, $git_dirty))
500 if defined $git_object;
502 if (defined $git_count && defined $git_object) {
503 genform("Full".($sz*2),
504 ljustt($sz, $git_object),
505 rjustt($sz, $git_count, $git_dirty));
508 genform("Full".($e*3)."T",
509 ljustt($e*2, $git_object, $git_dirty)
511 rjustt($e, $git_count));
516 sub do_some_best ($$) {
517 my ($modname, $formre) = @_;
518 my $fullmodname = "Commitid_${modname}_2D";
519 my @argl = qw(max_sz margin=Commitid_pixelsz());
520 p "module $fullmodname(".(join ', ', @argl).") {\n";
521 my $mbs = '$Commitid_max_best_scale';
522 p " sc_max = $mbs ? $mbs : 2;\n";
523 p " sz = max_sz - 2*[margin,margin];\n";
527 $b->{Chars} <=> $a->{Chars} or
528 $a->{Lines} <=> $b->{Chars}
531 $_->{Form} =~ m/$formre/ &&
536 my $form = $f->{Form};
537 p " sz_$form = Commitid_${form}_sz();\n";
538 foreach my $rot (qw(0 1)) {
539 my $id = "${form}_r${rot}";
540 p " sc_$id = min(sc_max";
541 foreach my $xy (qw(0 1)) {
542 p ",sz[$xy]/sz_$form","[",(($xy xor $rot)+0),"]";
545 push @do, " if (sc_$id >= 1.0";
546 push @do, " && sc_$id >= sc_${form}_r1" if !$rot;
548 push @do, " translate([margin,margin]) scale(sc_$id)\n";
549 push @do, " rotate(90) translate([0,-sz_$form"."[1]])\n" if $rot;
550 push @do, " Commitid_${form}_2D();\n";
556 echo("$fullmodname could not fit anything in", max_sz);
562 gen3dmodule "Commitid_$modname", @argl;
566 return unless $do_git;
568 # Auto-computer for `best fit'
570 # We have two best fit approaches: with count, and git-object-id-only
572 # For `with count', we only ever include the git object id if the
573 # result would be unambigous. That means that at least one space
574 # or punctuation was generated.
576 # We sort the options by firstly number of characters
577 # (decreasing), and then by number of lines (increasing) and
578 # try each one both ways round.
580 do_some_best('BestCount', 'Small|Full') if $do_git =~ m/c/;
581 do_some_best('BestObjid', 'Git|Full') if $do_git =~ m/o/;
586 if (m/^--(no)?-git$/) {
587 $do_git = $1 ? '' : 'co';
588 } elsif (m/^---git=objid$/i) {
591 $do_git_untracked = 0;
592 } elsif (m/^-t(.*)$/) {
594 die "bad usage: -t needs string argument\n";
596 gentextmodule($form, split /\n/, $_);
599 gentextmodule("Arg$argcounter", $_);
602 die "bad usage: unknown option \`$_'\n";
606 $do_git //= defined($argcounter) ? '' : 'co';
608 gentextmodule_demo_start_batch();
609 gentextmodule('FontDemo', @demo);
614 p "module Commitid_2DDemo(){\n";
615 p " st = Commitid__scale() * [ 10, 5 ];\n";
616 p " e = Commitid_pixelsz();\n";
617 p $_ foreach @gtm_demo_o;
620 flush STDOUT or die $!;
621 close STDOUT or die $!;
635 /#\ r /#\ ##\ # # ### // ### /#\ /#\
636 # # /# # # # # # # # # # # #
637 # # # /#/ ##< \## ##\ ##\ // >#< \##
638 # # # # # # # # # # # # #
639 \#/ /#\ ### ##/ # ##/ \#/ # \#/ ##/
645 /## ##\ # /## #r# ###
647 \## ##/ \## \## \#/ #