[libgit2-glib/wip/albfan/stage-windows] Invalid path resolving relative path on windows

[Alberto Fanjul <albfan src gnome org>]

commit 26d52aff31fa94ff8cdead1cbd5a98c3b4d6c241
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Tue May 18 08:56:03 2021 +0200

    Invalid path resolving relative path on windows

 libgit2-glib/ggit-index.c | 6 ++++++
 meson.build               | 4 ++++
 meson_options.txt         | 1 +
 3 files changed, 11 insertions(+)
---
diff --git a/libgit2-glib/ggit-index.c b/libgit2-glib/ggit-index.c
index 20cb8cd..d330119 100644
--- a/libgit2-glib/ggit-index.c
+++ b/libgit2-glib/ggit-index.c
@@ -341,6 +341,9 @@ ggit_index_remove (GgitIndex  *idx,
        g_object_unref (repo);
 
        path = g_file_get_relative_path (wd, file);
+#ifdef TRANSLATE_WINDOWS_PATHS
+       g_string_replace (path, "\\", "/", 0);
+#endif
        g_object_unref (wd);
 
        g_return_val_if_fail (path != NULL, FALSE);
@@ -456,6 +459,9 @@ ggit_index_add_file (GgitIndex  *idx,
 
        wd = ggit_repository_get_workdir (repo);
        path = g_file_get_relative_path (wd, file);
+#ifdef TRANSLATE_WINDOWS_PATHS
+       g_string_replace (path, "\\", "/", 0);
+#endif
 
        g_object_unref (wd);
        g_object_unref (repo);
diff --git a/meson.build b/meson.build
index a36b606..e65d95b 100644
--- a/meson.build
+++ b/meson.build
@@ -105,6 +105,10 @@ if get_option('b_ndebug') == 'true'
   common_flags += ['-DG_DISABLE_ASSERT']
 endif
 
+if get_option('translate-windows-paths')
+  common_flags += ['-DTRANSLATE_WINDOWS_PATHS']
+endif
+
 add_project_arguments(common_flags, language: 'c')
 
 if cc.has_link_argument('-Wl,-Bsymbolic-functions')
diff --git a/meson_options.txt b/meson_options.txt
index 90b3188..86f85d5 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -3,3 +3,4 @@ option('introspection', type: 'boolean', value: true, description: 'Enable GObje
 option('python', type: 'boolean', value: true, description: 'Build with python support')
 option('ssh', type: 'boolean', value: true, description: 'Build with libgit2 ssh support')
 option('vapi', type: 'boolean', value: true, description: 'Build Vala bindings')
+option('translate-windows-paths', type: 'boolean', value: true, description: 'Turn windows path into Unix')