X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=commitid.scad.pl;h=e51318aaf26ba755d3be754fd6a867f64770898f;hb=f8a450af5183bd37b15ebb2cd85047c45066f474;hp=ee9be882723147703c2054fff2e1151a51ea7c44;hpb=2720ea01f6fc120edd63d942a334ef5b29751306;p=reprap-play.git

diff --git a/commitid.scad.pl b/commitid.scad.pl
index ee9be88..e51318a 100755
--- a/commitid.scad.pl
+++ b/commitid.scad.pl
@@ -4,19 +4,46 @@ use strict;
 $SIG{__WARN__} = sub { die @_; };
 
 #  xxx much of the comment below is TODO
-
+#
+# Usage:
+#
+#   .../commitid.scad.pl [OPTION...] [STRING...] >commitid.scad.new \
+#     && mv -f commitid.scad.new commitid.scad
+#
+# Options:
+#
+#   --git    generate git commit indications, as shown below
+#            (this is the default if no strings are requested with -t)
+#
+#   --git=object
+#            generate git commit indication based on commit object only
+#            (ie avoid counting commits)
+#
+#   -i       do not generate `+' if git-untracked files are present
+#
+#   [-t[FORM]] TEXT
+#            generate a form FORM containing TEXT
+#            TEXT can contain newlines (final newline usually undesirable)
+#            if FORM not specified, generates Arg0 Arg1 Arg2 in sequence
+#            character set is SPC 0-9 a-f + *
+#
 # We generate a physical indication of which commit was used.
 #
 # We provide for scaling factors with dynamic variables:
-#    $Commitid_pixelsz        if not set, we use 0.4 } multiplied
+#    $Commitid_pixelsz        if not set, we use 0.8 } multiplied
 #    $Commitid_scale          if not set, we use 1.0 }  together
-#    $Commitid_depth          if not set, we use xy pixel size from above
+#    $Commitid_depth          if not set, we use xy pixel size from above / 2
 #    $Commitid_depth_scale    if not set, we use 1.0 (multiplies depth above)
 #
 # For each form we have
 #
-#    module Commitid_Form_2D(.4)
-#    module Commitid_Form()
+#    module Commitid_Form_2D() { ... }
+#    module Commitid_Form() { ... }
+#    function Commitid_Form_sz()     => [ x, y ]
+#
+#  These have their origin in the bottom left corner.  The 3D model
+#  is a positive, has its origin halfway through, and is twice the
+#  depth in height, so it can be added or subtracted.
 #
 # And we provide
 #
@@ -25,51 +52,66 @@ $SIG{__WARN__} = sub { die @_; };
 #
 # We can generate these forms:
 #
-#   Tiny3:
-#   Tiny4:
-#   Tiny5:
-#   Tiny6:
-#   Tiny7:
-#   Tiny8:
+#  In each case:
+#    if tree is dirty, * is suffixed or prefixed to count or commitid
+#    if tree has untracked files, + is added
+#    (where it is added depends on the Form; in any case it does not
+#    change the size, but steals space from digits)
+#
+#   Small2 Small3 ... Small10:
 #       git rev-list --first-parent --count HEAD
 #       typically 3-4 characters but we allow for up to 6
-#       eg
-#            Tiny4    1070
-#
-#   Tiny4Q:
-#   Tiny6Q:
-#   Tiny9Q:
-#       same but in two lines eg
-#            Tiny4Q   10
-#                     70
-#
-#   Git4
-#   Git6
-#   Git8
-#       git-rev-parse HEAD
-#       eg
-#            Git6    82f2a2
+#       padded with zeroes; if too long we reduce mod 10^n
+#       eg if the count is 123456
+#            Small5    3456*
+#            Small8    __123456    (where _ are spaces)
+#
+#   Small2S Small4S ... Small10S:
+#   Small3T Small9T:
+#       same but split into two lines (S) or three lines (T) eg
+#            Small4S  45     Small6T   _3
+#                     6*               45
+#                                      6*
+#
+#   Git2 Git3 ... Git10:
+#   Git4S Git6S ... Git10S:
+#   Git6T Git9T:
+#       git-rev-parse HEAD   (prefix of requested length)
+#       eg if the commitid is abcdef0123...
+#            Git5    abcd*
 
-#   Small4
-#   Small6
-#   Small8
+#   Full4 Full6 ... Full20:
 #       git-rev-list --first-parent --count HEAD
 #       git-rev-parse HEAD
+#       (all on two lines)
 #       eg
-#            Small6     1070
-#                     82f2a2
+#            Full6    abcdef       Full8     abcdef01
+#                     23456*                 _123456*
+#
+#   Full6T Full9T ... Full30T
+#       as Full but commit is split over two lines
+#       for a 3-line message; eg
+#             Full9T    abc
+#                       de*
+#                       456
+#
+#   FontDemo
+#
+#   Arg0, Arg1, ...
+#       Strings passed on command line
 
 sub p { print @_ or die $!; }
 
 p <<'END';
+// *** AUTOGENERATED - DO NOT EDIT *** //
 function Commitid_pixelsz() =
-  ($Commitid_pixelsz       ? $Commitid_pixelsz       : 0.4) *
+  ($Commitid_pixelsz       ? $Commitid_pixelsz       : 0.8) *
   ($Commitid_scale         ? $Commitid_scale         : 1.0);
 function Commitid_depth() =
-  ($Commitid_depth         ? $Commitid_depth         : Commitid_pixelsz()) *
+  ($Commitid_depth         ? $Commitid_depth         : Commitid_pixelsz()/2) *
   ($Commitid_depth_scale   ? $Commitid_depth_scale   : 1.0);
 function Commitid__scale() =
-  Commitid_pixelsz() / 0.1;
+  Commitid_pixelsz() / 0.2;
 END
 
 sub chrmodname ($) {
@@ -78,6 +120,58 @@ sub chrmodname ($) {
     return "Commitid__chr_$chrx";
 }
 
+our $gtm_demo_i = -1;
+our $gtm_demo_j;
+our @gtm_demo_o;
+
+sub gentextmodule_demo_start_batch () {
+    $gtm_demo_j = 0;
+    $gtm_demo_i++;
+}
+
+sub gentextmodule ($@) {
+    my ($form, @lines) = @_;
+    my $modb = "Commitid_$form";
+    p "module ${modb}_2D(){\n";
+    p " // |$_|\n" foreach @lines;
+    p " scale(Commitid__scale()){\n";
+    my $y = @lines;
+    my $cols = 1;
+    foreach my $line (@lines) {
+	$y--;
+	my $x = 0;
+	foreach my $chr (split //, $line) {
+	    p sprintf "  translate([%d * 0.8, %d * 1.2]) %s();\n",
+		$x, $y, chrmodname $chr
+		if $chr =~ m/\S/;
+	    $x++;
+	}
+	$cols = $x if $x > $cols;
+    }
+    p " }\n";
+    p "}\n";
+    p "module ${modb}(){\n";
+    p " d=Commitid_depth();\n";
+    p " translate([0,0,-d]) linear_extrude(height=d*2) ${modb}_2D();\n";
+    p "}\n";
+
+    p sprintf "function %s_sz() = Commitid__scale() * 0.1 * [ %d, %d ];\n",
+	$modb, 2 * ($cols * 4 - 1), 2 * (@lines * 6 - 1);
+
+    push @gtm_demo_o, <<END;
+ translate([$gtm_demo_i * st[0], $gtm_demo_j * st[1]]) {
+  difference(){
+   color("blue") translate([-e,-e]) square(${modb}_sz() + 2*[e,e]);
+   square(${modb}_sz());
+  }
+  ${modb}_2D();
+}
+END
+    $gtm_demo_j++;
+}
+
+our @demo;
+
 sub parsefont () {
     my %cellmap;
     for (;;) {
@@ -91,6 +185,7 @@ sub parsefont () {
     my %chrpolys;
     while (<DATA>) {
 	next unless m/\S/;
+	chomp;
 	my @chrs = split / /, $_;
 	<DATA> !~ m/\S/ or die;
 	foreach my $row (reverse 0..4) {
@@ -124,7 +219,7 @@ sub parsefont () {
 	}    
     }
 
-    my @demo;
+    my $demo = '';
     my $democols = 6;
     foreach my $chr (sort keys %chrpolys) {
 	my $mod = chrmodname $chr;
@@ -142,22 +237,220 @@ sub parsefont () {
 	    p "]);\n";
 	}
 	p "}\n";
-	my $px = @demo % $democols;
-	my $py = int(@demo / $democols);
-	push @demo, " scale( Commitid__scale() ) translate([$px * 0.800, $py * 1.200]) 
- $mod ();\n";
+	$demo .= $chr;
+    }
+    @demo = reverse $demo =~ m{.{1,$democols}}go;
+}
+
+parsefont();
+
+our $do_git; # contains may chars 'c' (count) and/or 'o' (object)
+our $do_git_untracked = 1;
+our $argcounter;
+
+our @forms;
+
+sub rjustt ($$;$) { # right justify and truncate (ie, pad and truncate at left)
+                    # always includes prefix
+    my ($sz, $whole, $prefix) = @_;
+    $prefix //= '';
+    my $lw = length $whole;
+    my $spare = $sz - $lw - (length $prefix);
+    return
+	($spare > 0 ? (' ' x $spare) : '').
+	$prefix.
+	substr($whole, ($spare < 0 ? -$spare : 0));
+}
+
+sub ljustt ($$;$) {
+    my ($sz, $whole, $suffix) = @_;
+    $suffix //= '';
+    $sz -= length $suffix;
+    return sprintf "%-${sz}.${sz}s%s", $whole, $suffix;
+}
+
+sub genform ($@) {
+    my ($form, @lines) = @_;
+    gentextmodule($form, @lines);
+    my $f = {
+	Form => $form,
+	Chars => (length join '', @lines),
+	Lines => (scalar @lines),
+	Ambiguous => ($form =~ m/Full/ && !grep { m/\W/ } @lines),
+    };
+    push @forms, $f;
+}
+
+sub genform_q ($$$) {
+    my ($form, $s, $lines) = @_;
+    $gtm_demo_j++;
+    my $l = length $s;
+    return if $l % $lines;
+    my $e = $l/$lines;
+    return if $e < 2;
+    $gtm_demo_j--;
+    genform($form, $s =~ m/.{$e}/g);
+}
+
+sub genform_plusq ($$) {
+    my ($form, $s) = @_;
+    genform($form, $s);
+    genform_q("${form}S", $s, 2);
+    genform_q("${form}T", $s, 3);
+}
+
+our @gcmd;
+
+sub gitrun_start () {
+    open F, "-|", @gcmd or die "$gcmd[0]: start: $!";
+}
+
+sub gitrun_done (;$) {
+    my ($errok) = @_;
+    $?=0; $!=0;
+    return if close F;
+    return if $errok;
+    die $! if $!;
+    die "@gcmd failed ($?)\n";
+}
+
+sub gitoutput (@) {
+    (@gcmd) = (qw(git), @_);
+    gitrun_start;
+    $_ = <F>;
+    gitrun_done;
+    defined or die "@gcmd produced no output";
+    chomp or die "@gcmd produced no final newline";
+    $_;
+}
+
+sub do_git () {
+    return unless $do_git;
+
+    @gcmd = qw(git status --porcelain);
+    push @gcmd, qw(--untracked=no) unless $do_git_untracked;
+
+    my $git_dirty = '';
+    gitrun_start;
+    while (<F>) {
+	if (m/^\?\?/ && $do_git_untracked) {
+	    $git_dirty = '+';
+	    next;
+	}
+	$git_dirty = '*';
+	last;
+    }
+    gitrun_done($git_dirty eq '*');
+
+    my $git_count;
+    my $git_object;
+
+    if ($do_git =~ m/c/) {
+	$git_count = gitoutput qw(rev-list --first-parent --count HEAD);
+    }
+    if ($do_git =~ m/o/) {
+	$git_object = gitoutput qw(rev-parse HEAD);
+    }
+
+    foreach my $sz (2..10) {
+	gentextmodule_demo_start_batch();
+
+	genform_plusq("Small$sz", rjustt($sz, $git_count, $git_dirty))
+	    if defined $git_count;
+
+	genform_plusq("Git$sz", ljustt($sz, $git_object, $git_dirty))
+	    if defined $git_object;
+
+	if (defined $git_count && defined $git_object) {
+	    genform("Full".($sz*2),
+		    ljustt($sz, $git_object),
+		    rjustt($sz, $git_count, $git_dirty));
+
+	    my $e = $sz;
+	    genform("Full".($e*3)."T",
+		    ljustt($e*2, $git_object, $git_dirty)
+		    =~ m/.{$e}/g,
+		    rjustt($e, $git_count));
+	}
+    }
+}
+
+sub do_some_best ($$) {
+    my ($modname, $formre) = @_;
+    p "module Commitid_$modname(max_sz) {\n";
+    foreach my $f (
+        sort {
+	    $b->{Chars} <=> $a->{Chars} or
+	    $a->{Lines} <=> $b->{Chars}
+        }
+        grep {
+	    $_->{Form} =~ m/$formre/ &&
+	    !$_->{Ambiguous}
+	}
+        @forms
+    ) {
+        p "// $f->{Form}\n";
     }
-    p "module Commitid_FontDemo(){\n";
-    p $_ foreach @demo;
     p "}\n";
+}
 
-#    use Data::Dumper;
-#    print Dumper(\%chrpolys);
+sub do_git_best () {
+    return unless $do_git;
+
+    # Auto-computer for `best fit'
+    #
+    # We have two best fit approaches: with count, and git-object-id-only
+    #
+    # For `with count', we only ever include the git object id if the
+    # result would be unambigous.  That means that at least one space
+    # or punctuation was generated.
+    #
+    # We sort the options by firstly number of characters
+    # (decreasing), and then by number of lines (increasing) and
+    # try each one both ways round.
+
+    do_some_best('BestCount', 'Small|Full') if $do_git =~ m/c/;
+    do_some_best('BestObjid', 'Git|Full') if $do_git =~ m/o/;
 }
 
-parsefont();
+while (@ARGV) {
+    $_ = shift;
+    if (m/^--(no)?-git$/) {
+	$do_git = $1 ? '' : 'co';
+    } elsif (m/^---git=object$/) {
+	$do_git = 'o';
+    } elsif (m/^-i$/) {
+	$do_git_untracked = 0;
+    } elsif (m/^-t(.*)$/) {
+	my $form = $1;
+	die "bad usage: -t needs string argument\n";
+	$_ = shift;
+	gentextmodule($form, split /\n/, $_);
+	$argcounter //= 0;
+    } elsif (m/^[^-]/) {
+	gentextmodule("Arg$argcounter", $_);
+	$argcounter++;
+    } else {
+	die "bad usage: unknown option \`$_'\n";
+    }
+}
 
-#p "Commitid_FontDemo();\n";
+$do_git //= defined($argcounter) ? '' : 'co';
+
+gentextmodule_demo_start_batch();
+gentextmodule('FontDemo', @demo);
+
+do_git();
+do_git_best();
+
+p "module Commitid_2DDemo(){\n";
+p " st = Commitid__scale() * [ 10, 5 ];\n";
+p " e  = Commitid_pixelsz();\n";
+p $_ foreach @gtm_demo_o;
+p "}\n";
+
+flush STDOUT or die $!;
+close STDOUT or die $!;
 
 __DATA__
 
@@ -185,3 +478,10 @@ a b c d e f
 # # # # #   # # #/  #
 \## ##/ \## \## \#/ #
 
++ *
+
+    # #
+ #  \#/
+### ###
+ #  /#\
+    # #