Split evince-thumbnailer into its own package

This allows us to have thumbnails without having to install Evince.
This is useful in Silverblue, where we install Evince through
Flatpak. See https://github.com/fedora-silverblue/issue-tracker/issues/98

evince.spec

@@ -6,7 +6,7 @@
 
 Name:           evince
 Version:        3.38.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Document viewer
 
 License:        GPLv2+ and GPLv3+ and LGPLv2+ and MIT and Afmparse
@@ -51,6 +51,7 @@ BuildRequires:  djvulibre-devel
 BuildRequires:  pkgconfig(libgxps) >= %{gxps_version}
 
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
+Requires: %{name}-thumbnailer%{?_isa} = %{version}-%{release}
 Requires: glib2%{?_isa} >= %{glib2_version}
 Requires: gtk3%{?_isa} >= %{gtk3_version}
 
@@ -116,6 +117,13 @@ This package contains the evince extension for the nautilus file manager.
 It adds an additional tab called "Document" to the file properties dialog.
 %endif
 
+%package thumbnailer
+Summary: Evince thumbnailer
+Requires: %{name}-libs%{?_isa} = %{version}-%{release}
+
+%description thumbnailer
+This package brings the Evince thumbnailer independently from Evince.
+
 %prep
 %autosetup -p1
 
@@ -158,7 +166,8 @@ desktop-file-validate $RPM_BUILD_ROOT%{_datadir}/applications/org.gnome.Evince-p
 %ldconfig_scriptlets libs
 
 %files -f evince.lang
-%{_bindir}/*
+%{_bindir}/evince
+%{_bindir}/evince-previewer
 %{_datadir}/%{name}/
 %{_datadir}/applications/org.gnome.Evince.desktop
 %{_datadir}/applications/org.gnome.Evince-previewer.desktop
@@ -170,7 +179,6 @@ desktop-file-validate $RPM_BUILD_ROOT%{_datadir}/applications/org.gnome.Evince-p
 %{_datadir}/glib-2.0/schemas/org.gnome.Evince.gschema.xml
 %{_datadir}/GConf/gsettings/evince.convert
 %{_datadir}/metainfo/org.gnome.Evince.appdata.xml
-%{_datadir}/thumbnailers/evince.thumbnailer
 %if ! 0%{?flatpak}
 %{_userunitdir}/org.gnome.Evince.service
 %endif
@@ -240,7 +248,15 @@ desktop-file-validate $RPM_BUILD_ROOT%{_datadir}/applications/org.gnome.Evince-p
 %{_libdir}/nautilus/extensions-3.0/libevince-properties-page.so
 %endif
 
+%files thumbnailer
+%{_bindir}/evince-thumbnailer
+%{_datadir}/thumbnailers/evince.thumbnailer
+
 %changelog
+* Tue Nov 10 2020 Felipe Borges <feborges@redhat.com> - 3.38.0-2
+- Split evince-thumbnailer into its own package
+- See https://github.com/fedora-silverblue/issue-tracker/issues/98
+
 * Sat Sep 12 2020 Kalev Lember <klember@redhat.com> - 3.38.0-1
 - Update to 3.38.0