Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 394 insertions, 0 deletions

diff --git a/contrib/buildsystems/engine.pl b/contrib/buildsystems/engine.pl
new file mode 100755
index 000000000000..fba8a3f056a0
--- /dev/null
+++ b/contrib/buildsystems/engine.pl
@@ -0,0 +1,394 @@
+#!/usr/bin/perl -w
+######################################################################
+# Do not call this script directly!
+#
+# The generate script ensures that @INC is correct before the engine
+# is executed.
+#
+# Copyright (C) 2009 Marius Storm-Olsen <mstormo@gmail.com>
+######################################################################
+use strict;
+use File::Basename;
+use File::Spec;
+use Cwd;
+use Generators;
+use Text::ParseWords;
+
+my (%build_structure, %compile_options, @makedry);
+my $out_dir = getcwd();
+my $git_dir = $out_dir;
+$git_dir =~ s=\\=/=g;
+$git_dir = dirname($git_dir) while (!-e "$git_dir/git.c" && "$git_dir" ne "");
+die "Couldn't find Git repo" if ("$git_dir" eq "");
+
+my @gens = Generators::available();
+my $gen = "Vcproj";
+
+sub showUsage
+{
+    my $genlist = join(', ', @gens);
+    print << "EOM";
+generate usage:
+  -g <GENERATOR>  --gen <GENERATOR> Specify the buildsystem generator    (default: $gen)
+                                    Available: $genlist
+  -o <PATH>       --out <PATH>      Specify output directory generation  (default: .)
+                  --make-out <PATH> Write the output of GNU Make into a file
+  -i <FILE>       --in <FILE>       Specify input file, instead of running GNU Make
+  -h,-?           --help            This help
+EOM
+    exit 0;
+}
+
+# Parse command-line options
+my $make_out;
+while (@ARGV) {
+    my $arg = shift @ARGV;
+    if ("$arg" eq "-h" || "$arg" eq "--help" || "$arg" eq "-?") {
+	showUsage();
+	exit(0);
+    } elsif("$arg" eq "--out" || "$arg" eq "-o") {
+	$out_dir = shift @ARGV;
+    } elsif("$arg" eq "--make-out") {
+	$make_out = shift @ARGV;
+    } elsif("$arg" eq "--gen" || "$arg" eq "-g") {
+	$gen = shift @ARGV;
+    } elsif("$arg" eq "--in" || "$arg" eq "-i") {
+	my $infile = shift @ARGV;
+        open(F, "<$infile") || die "Couldn't open file $infile";
+        @makedry = <F>;
+        close(F);
+    } else {
+        die "Unknown option: " . $arg;
+    }
+}
+
+# NOT using File::Spec->rel2abs($path, $base) here, as
+# it fails badly for me in the msysgit environment
+$git_dir = File::Spec->rel2abs($git_dir);
+$out_dir = File::Spec->rel2abs($out_dir);
+my $rel_dir = makeOutRel2Git($git_dir, $out_dir);
+
+# Print some information so the user feels informed
+print << "EOM";
+-----
+Generator: $gen
+Git dir:   $git_dir
+Out dir:   $out_dir
+-----
+Running GNU Make to figure out build structure...
+EOM
+
+# Pipe a make --dry-run into a variable, if not already loaded from file
+# Capture the make dry stderr to file for review (will be empty for a release build).
+
+my $ErrsFile = "msvc-build-makedryerrors.txt";
+@makedry = `make -C $git_dir -n MSVC=1 SKIP_VCPKG=1 V=1 2>$ErrsFile`
+if !@makedry;
+# test for an empty Errors file and remove it
+unlink $ErrsFile if -f -z $ErrsFile;
+
+if (defined $make_out) {
+    open OUT, ">" . $make_out;
+    print OUT @makedry;
+    close OUT;
+}
+
+# Parse the make output into usable info
+parseMakeOutput();
+
+# Finally, ask the generator to start generating..
+Generators::generate($gen, $git_dir, $out_dir, $rel_dir, %build_structure);
+
+# main flow ends here
+# -------------------------------------------------------------------------------------------------
+
+
+# 1) path: /foo/bar/baz        2) path: /foo/bar/baz   3) path: /foo/bar/baz
+#    base: /foo/bar/baz/temp      base: /foo/bar          base: /tmp
+#    rel:  ..                     rel:  baz               rel:  ../foo/bar/baz
+sub makeOutRel2Git
+{
+    my ($path, $base) = @_;
+    my $rel;
+    if ("$path" eq "$base") {
+        return ".";
+    } elsif ($base =~ /^$path/) {
+        # case 1
+        my $tmp = $base;
+        $tmp =~ s/^$path//;
+        foreach (split('/', $tmp)) {
+            $rel .= "../" if ("$_" ne "");
+        }
+    } elsif ($path =~ /^$base/) {
+        # case 2
+        $rel = $path;
+        $rel =~ s/^$base//;
+        $rel = "./$rel";
+    } else {
+        my $tmp = $base;
+        foreach (split('/', $tmp)) {
+            $rel .= "../" if ("$_" ne "");
+        }
+        $rel .= $path;
+    }
+    $rel =~ s/\/\//\//g; # simplify
+    $rel =~ s/\/$//;     # don't end with /
+    return $rel;
+}
+
+sub parseMakeOutput
+{
+    print "Parsing GNU Make output to figure out build structure...\n";
+    my $line = 0;
+    while (my $text = shift @makedry) {
+        my $ate_next;
+        do {
+            $ate_next = 0;
+            $line++;
+            chomp $text;
+            chop $text if ($text =~ /\r$/);
+            if ($text =~ /\\$/) {
+                $text =~ s/\\$//;
+                $text .= shift @makedry;
+                $ate_next = 1;
+            }
+        } while($ate_next);
+
+        if ($text =~ /^test /) {
+            # options to test (eg -o) may be mistaken for linker options
+            next;
+        }
+
+        if ($text =~ /^(mkdir|msgfmt) /) {
+            # options to the Portable Object translations
+            # the line "mkdir ... && msgfmt ..." contains no linker options
+            next;
+        }
+
+        if($text =~ / -c /) {
+            # compilation
+            handleCompileLine($text, $line);
+
+        } elsif ($text =~ / -o /) {
+            # linking executable
+            handleLinkLine($text, $line);
+
+        } elsif ($text =~ /\.o / && $text =~ /\.a /) {
+            # libifying
+            handleLibLine($text, $line);
+#
+#        } elsif ($text =~ /^cp /) {
+#            # copy file around
+#
+#        } elsif ($text =~ /^rm -f /) {
+#            # shell command
+#
+#        } elsif ($text =~ /^make[ \[]/) {
+#            # make output
+#
+#        } elsif ($text =~ /^echo /) {
+#            # echo to file
+#
+#        } elsif ($text =~ /^if /) {
+#            # shell conditional
+#
+#        } elsif ($text =~ /^tclsh /) {
+#            # translation stuff
+#
+#        } elsif ($text =~ /^umask /) {
+#            # handling boilerplates
+#
+#        } elsif ($text =~ /\$\(\:\)/) {
+#            # ignore
+#
+#        } elsif ($text =~ /^FLAGS=/) {
+#            # flags check for dependencies
+#
+#        } elsif ($text =~ /^'\/usr\/bin\/perl' -MError -e/) {
+#            # perl commands for copying files
+#
+#        } elsif ($text =~ /generate-cmdlist\.sh/) {
+#            # command for generating list of commands
+#
+#        } elsif ($text =~ /new locations or Tcl/) {
+#            # command for detecting Tcl/Tk changes
+#
+#        } elsif ($text =~ /mkdir -p/) {
+#            # command creating path
+#
+#        } elsif ($text =~ /: no custom templates yet/) {
+#            # whatever
+#
+#        } else {
+#            print "Unhandled (line: $line): $text\n";
+        }
+    }
+
+#    use Data::Dumper;
+#    print "Parsed build structure:\n";
+#    print Dumper(%build_structure);
+}
+
+# variables for the compilation part of each step
+my (@defines, @incpaths, @cflags, @sources);
+
+sub clearCompileStep
+{
+    @defines = ();
+    @incpaths = ();
+    @cflags = ();
+    @sources = ();
+}
+
+sub removeDuplicates
+{
+    my (%dupHash, $entry);
+    %dupHash = map { $_, 1 } @defines;
+    @defines = keys %dupHash;
+
+    %dupHash = map { $_, 1 } @incpaths;
+    @incpaths = keys %dupHash;
+
+    %dupHash = map { $_, 1 } @cflags;
+    @cflags = keys %dupHash;
+}
+
+sub handleCompileLine
+{
+    my ($line, $lineno) = @_;
+    my @parts = shellwords($line);
+    my $sourcefile;
+    shift(@parts); # ignore cmd
+    while (my $part = shift @parts) {
+        if ("$part" eq "-o") {
+            # ignore object file
+            shift @parts;
+        } elsif ("$part" eq "-c") {
+            # ignore compile flag
+        } elsif ("$part" eq "-c") {
+        } elsif ($part =~ /^.?-I/) {
+            push(@incpaths, $part);
+        } elsif ($part =~ /^.?-D/) {
+            push(@defines, $part);
+        } elsif ($part =~ /^-/) {
+            push(@cflags, $part);
+        } elsif ($part =~ /\.(c|cc|cpp)$/) {
+            $sourcefile = $part;
+        } else {
+            die "Unhandled compiler option @ line $lineno: $part";
+        }
+    }
+    @{$compile_options{"${sourcefile}_CFLAGS"}} = @cflags;
+    @{$compile_options{"${sourcefile}_DEFINES"}} = @defines;
+    @{$compile_options{"${sourcefile}_INCPATHS"}} = @incpaths;
+    clearCompileStep();
+}
+
+sub handleLibLine
+{
+    my ($line, $lineno) = @_;
+    my (@objfiles, @lflags, $libout, $part);
+    # kill cmd and rm 'prefix'
+    $line =~ s/^rm -f .* && .* rcs //;
+    my @parts = shellwords($line);
+    while ($part = shift @parts) {
+        if ($part =~ /^-/) {
+            push(@lflags, $part);
+        } elsif ($part =~ /\.(o|obj)$/) {
+            push(@objfiles, $part);
+        } elsif ($part =~ /\.(a|lib)$/) {
+            $libout = $part;
+            $libout =~ s/\.a$//;
+        } else {
+            die "Unhandled lib option @ line $lineno: $part";
+        }
+    }
+#    print "LibOut: '$libout'\nLFlags: @lflags\nOfiles: @objfiles\n";
+#    exit(1);
+    foreach (@objfiles) {
+        my $sourcefile = $_;
+        $sourcefile =~ s/\.o$/.c/;
+        push(@sources, $sourcefile);
+        push(@cflags, @{$compile_options{"${sourcefile}_CFLAGS"}});
+        push(@defines, @{$compile_options{"${sourcefile}_DEFINES"}});
+        push(@incpaths, @{$compile_options{"${sourcefile}_INCPATHS"}});
+    }
+    removeDuplicates();
+
+    push(@{$build_structure{"LIBS"}}, $libout);
+    @{$build_structure{"LIBS_${libout}"}} = ("_DEFINES", "_INCLUDES", "_CFLAGS", "_SOURCES",
+                                             "_OBJECTS");
+    @{$build_structure{"LIBS_${libout}_DEFINES"}} = @defines;
+    @{$build_structure{"LIBS_${libout}_INCLUDES"}} = @incpaths;
+    @{$build_structure{"LIBS_${libout}_CFLAGS"}} = @cflags;
+    @{$build_structure{"LIBS_${libout}_LFLAGS"}} = @lflags;
+    @{$build_structure{"LIBS_${libout}_SOURCES"}} = @sources;
+    @{$build_structure{"LIBS_${libout}_OBJECTS"}} = @objfiles;
+    clearCompileStep();
+}
+
+sub handleLinkLine
+{
+    my ($line, $lineno) = @_;
+    my (@objfiles, @lflags, @libs, $appout, $part);
+    my @parts = shellwords($line);
+    shift(@parts); # ignore cmd
+    while ($part = shift @parts) {
+        if ($part =~ /^-IGNORE/) {
+            push(@lflags, $part);
+        } elsif ($part =~ /^-[GRIMDO]/) {
+            # eat compiler flags
+        } elsif ("$part" eq "-o") {
+            $appout = shift @parts;
+        } elsif ("$part" eq "-lz") {
+            push(@libs, "zlib.lib");
+        } elsif ("$part" eq "-lcrypto") {
+            push(@libs, "libeay32.lib");
+        } elsif ("$part" eq "-lssl") {
+            push(@libs, "ssleay32.lib");
+        } elsif ("$part" eq "-lcurl") {
+            push(@libs, "libcurl.lib");
+        } elsif ("$part" eq "-lexpat") {
+            push(@libs, "expat.lib");
+        } elsif ("$part" eq "-liconv") {
+            push(@libs, "libiconv.lib");
+        } elsif ($part =~ /^[-\/]/) {
+            push(@lflags, $part);
+        } elsif ($part =~ /\.(a|lib)$/) {
+            $part =~ s/\.a$/.lib/;
+            push(@libs, $part);
+        } elsif ($part eq 'invalidcontinue.obj') {
+            # ignore - known to MSVC
+        } elsif ($part =~ /\.o$/) {
+            push(@objfiles, $part);
+        } elsif ($part =~ /\.obj$/) {
+            # do nothing, 'make' should not be producing .obj, only .o files
+        } else {
+            die "Unhandled link option @ line $lineno: $part";
+        }
+    }
+#    print "AppOut: '$appout'\nLFlags: @lflags\nLibs  : @libs\nOfiles: @objfiles\n";
+#    exit(1);
+    foreach (@objfiles) {
+        my $sourcefile = $_;
+        $sourcefile =~ s/\.o$/.c/;
+        push(@sources, $sourcefile);
+        push(@cflags, @{$compile_options{"${sourcefile}_CFLAGS"}});
+        push(@defines, @{$compile_options{"${sourcefile}_DEFINES"}});
+        push(@incpaths, @{$compile_options{"${sourcefile}_INCPATHS"}});
+    }
+    removeDuplicates();
+
+    removeDuplicates();
+    push(@{$build_structure{"APPS"}}, $appout);
+    @{$build_structure{"APPS_${appout}"}} = ("_DEFINES", "_INCLUDES", "_CFLAGS", "_LFLAGS",
+                                             "_SOURCES", "_OBJECTS", "_LIBS");
+    @{$build_structure{"APPS_${appout}_DEFINES"}} = @defines;
+    @{$build_structure{"APPS_${appout}_INCLUDES"}} = @incpaths;
+    @{$build_structure{"APPS_${appout}_CFLAGS"}} = @cflags;
+    @{$build_structure{"APPS_${appout}_LFLAGS"}} = @lflags;
+    @{$build_structure{"APPS_${appout}_SOURCES"}} = @sources;
+    @{$build_structure{"APPS_${appout}_OBJECTS"}} = @objfiles;
+    @{$build_structure{"APPS_${appout}_LIBS"}} = @libs;
+    clearCompileStep();
+}