From b704b8292abecd52df48c9c0b38b6deb52e1e9a4 Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Mon, 29 Jul 2019 13:08:01 -0700
Subject: [PATCH] Vcproj.pm: auto-generate GUIDs

We ran out GUIDs. Again. But there is no need to: we can generate them
semi-randomly from the target file name of the project.

Note: the Vcproj generator is probably only interesting for historical
reasons; nevertheless, the upcoming Vcxproj generator (to support modern
Visual Studio versions) is based on the Vcproj generator and it is
better to fix this here first.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 contrib/buildsystems/Generators/Vcproj.pm | 66 +++++--------------------------
 1 file changed, 9 insertions(+), 57 deletions(-)

diff --git a/contrib/buildsystems/Generators/Vcproj.pm b/contrib/buildsystems/Generators/Vcproj.pm
index cfa74adcc2..c79b706bc8 100644
--- a/contrib/buildsystems/Generators/Vcproj.pm
+++ b/contrib/buildsystems/Generators/Vcproj.pm
@@ -3,6 +3,7 @@ require Exporter;
 
 use strict;
 use vars qw($VERSION);
+use Digest::SHA qw(sha256_hex);
 
 our $VERSION = '1.00';
 our(@ISA, @EXPORT, @EXPORT_OK, @AVAILABLE);
@@ -12,59 +13,12 @@ BEGIN {
     push @EXPORT_OK, qw(generate);
 }
 
-my $guid_index = 0;
-my @GUIDS = (
-    "{E07B9989-2BF7-4F21-8918-BE22BA467AC3}",
-    "{278FFB51-0296-4A44-A81A-22B87B7C3592}",
-    "{7346A2C4-F0FD-444F-9EBE-1AF23B2B5650}",
-    "{67F421AC-EB34-4D49-820B-3196807B423F}",
-    "{385DCFE1-CC8C-4211-A451-80FCFC31CA51}",
-    "{97CC46C5-D2CC-4D26-B634-E75792B79916}",
-    "{C7CE21FE-6EF8-4012-A5C7-A22BCEDFBA11}",
-    "{51575134-3FDF-42D1-BABD-3FB12669C6C9}",
-    "{0AE195E4-9823-4B87-8E6F-20C5614AF2FF}",
-    "{4B918255-67CA-43BB-A46C-26704B666E6B}",
-    "{18CCFEEF-C8EE-4CC1-A265-26F95C9F4649}",
-    "{5D5D90FA-01B7-4973-AFE5-CA88C53AC197}",
-    "{1F054320-036D-49E1-B384-FB5DF0BC8AC0}",
-    "{7CED65EE-F2D9-4171-825B-C7D561FE5786}",
-    "{8D341679-0F07-4664-9A56-3BA0DE88B9BC}",
-    "{C189FEDC-2957-4BD7-9FA4-7622241EA145}",
-    "{66844203-1B9F-4C53-9274-164FFF95B847}",
-    "{E4FEA145-DECC-440D-AEEA-598CF381FD43}",
-    "{73300A8E-C8AC-41B0-B555-4F596B681BA7}",
-    "{873FDEB1-D01D-40BF-A1BF-8BBC58EC0F51}",
-    "{7922C8BE-76C5-4AC6-8BF7-885C0F93B782}",
-    "{E245D370-308B-4A49-BFC1-1E527827975F}",
-    "{F6FA957B-66FC-4ED7-B260-E59BBE4FE813}",
-    "{E6055070-0198-431A-BC49-8DB6CEE770AE}",
-    "{54159234-C3EB-43DA-906B-CE5DA5C74654}",
-    "{594CFC35-0B60-46F6-B8EF-9983ACC1187D}",
-    "{D93FCAB7-1F01-48D2-B832-F761B83231A5}",
-    "{DBA5E6AC-E7BE-42D3-8703-4E787141526E}",
-    "{6171953F-DD26-44C7-A3BE-CC45F86FC11F}",
-    "{9E19DDBE-F5E4-4A26-A2FE-0616E04879B8}",
-    "{AE81A615-99E3-4885-9CE0-D9CAA193E867}",
-    "{FBF4067E-1855-4F6C-8BCD-4D62E801A04D}",
-    "{17007948-6593-4AEB-8106-F7884B4F2C19}",
-    "{199D4C8D-8639-4DA6-82EF-08668C35DEE0}",
-    "{E085E50E-C140-4CF3-BE4B-094B14F0DDD6}",
-    "{00785268-A9CC-4E40-AC29-BAC0019159CE}",
-    "{4C06F56A-DCDB-46A6-B67C-02339935CF12}",
-    "{3A62D3FD-519E-4EC9-8171-D2C1BFEA022F}",
-    "{3A62D3FD-519E-4EC9-8171-D2C1BFEA022F}",
-    "{9392EB58-D7BA-410B-B1F0-B2FAA6BC89A7}",
-    "{2ACAB2D5-E0CE-4027-BCA0-D78B2D7A6C66}",
-    "{86E216C3-43CE-481A-BCB2-BE5E62850635}",
-    "{FB631291-7923-4B91-9A57-7B18FDBB7A42}",
-    "{0A176EC9-E934-45B8-B87F-16C7F4C80039}",
-    "{DF55CA80-46E8-4C53-B65B-4990A23DD444}",
-    "{3A0F9895-55D2-4710-BE5E-AD7498B5BF44}",
-    "{294BDC5A-F448-48B6-8110-DD0A81820F8C}",
-    "{4B9F66E9-FAC9-47AB-B1EF-C16756FBFD06}",
-    "{72EA49C6-2806-48BD-B81B-D4905102E19C}",
-    "{5728EB7E-8929-486C-8CD5-3238D060E768}"
-);
+sub generate_guid ($) {
+    my $hex = sha256_hex($_[0]);
+    $hex =~ s/^(.{8})(.{4})(.{4})(.{4})(.{12}).*/{$1-$2-$3-$4-$5}/;
+    $hex =~ tr/a-z/A-Z/;
+    return $hex;
+}
 
 sub generate {
     my ($git_dir, $out_dir, $rel_dir, %build_structure) = @_;
@@ -92,9 +46,8 @@ sub createLibProject {
     $target =~ s/\//_/g;
     $target =~ s/\.a//;
 
-    my $uuid = $GUIDS[$guid_index];
+    my $uuid = generate_guid($libname);
     $$build_structure{"LIBS_${target}_GUID"} = $uuid;
-    $guid_index += 1;
 
     my @srcs = sort(map("$rel_dir\\$_", @{$$build_structure{"LIBS_${libname}_SOURCES"}}));
     my @sources;
@@ -311,9 +264,8 @@ sub createAppProject {
     $target =~ s/\//_/g;
     $target =~ s/\.exe//;
 
-    my $uuid = $GUIDS[$guid_index];
+    my $uuid = generate_guid($appname);
     $$build_structure{"APPS_${target}_GUID"} = $uuid;
-    $guid_index += 1;
 
     my @srcs = sort(map("$rel_dir\\$_", @{$$build_structure{"APPS_${appname}_SOURCES"}}));
     my @sources;
-- 
2.11.4.GIT