* release.pl: verify upfront that non-rc splash is available on 1. point

release and ltr splash on .4 point release of a ltr branch
* fix splash (rc->non-rc)

scripts/release.pl

@@ -136,7 +136,13 @@ ($$)
 
 my $splashwidth;
 unless( defined $dopoint ) {
-	pod2usage("Splash images/splash/splash-$newmajor.$newminor.png not found") unless -r "images/splash/splash-$newmajor.$newminor.png";
+	pod2usage("Splash images/splash/splash-${newmajor}.${newminor}rc.png not found") unless -r "images/splash/splash-${newmajor}.${newminor}rc.png";
+} elsif($newpatch == 1) {
+	pod2usage("Splash images/splash/splash-${newmajor}.${newminor}.png not found") unless -r "images/splash/splash-${newmajor}.${newminor}.png";
+} elsif($newpatch == 4) {	# TODO handle EPRs
+	if( system("git tag -l | grep -q '^ltr-${newmajor}_${newminor}$'") == 0) {
+		pod2usage("Splash images/splash/splash-${newmajor}.${newminor}ltr.png not found") unless -r "images/splash/splash-${newmajor}.${newminor}ltr.png";
+	}
 }
 
 print "Last pull rebase...\n";
@@ -180,11 +186,18 @@ ($$)
 unless( defined $dopoint ) {
 	run( "perl -i -pe 's/qgis-dev-deps/qgis-ltr-deps/;' INSTALL.md", "could not update osgeo4w deps package" ) if $doltr;
 	run( "perl -i -pe 's/qgis-dev-deps/qgis-rel-deps/;' INSTALL.md", "could not update osgeo4w deps package" ) unless $doltr;
-	run( "cp -v images/splash/splash-$newmajor.$newminor.png images/splash/splash.png", "splash png switch failed" );
+	run( "cp -v images/splash/splash-${newmajor}.${newminor}rc.png images/splash/splash.png", "splash png switch failed" );
 	run( "git commit -n -a -m \"Release of $release ($newreleasename)\"", "release commit failed" );
 	run( "git tag $reltag -m 'Version $release'", "release tag failed" );
 	run( "for i in \$(seq 20); do tx push -s --branch $relbranch && exit 0; echo \"Retry \$i/20...\"; done; exit 1", "push translation for $relbranch branch" );
 } else {
+	if($newpatch == 1) {
+		run( "cp -v images/splash/splash-${newmajor}.${newminor}.png images/splash/splash.png", "splash png switch failed" );
+	} elsif($newpatch == 4) {	# TODO handle EPRs
+		if( system("git tag -l | grep -q '^ltr-${newmajor}_${newminor}$'") == 0) {
+			run( "cp -v images/splash/splash-${newmajor}.${newminor}ltr.png images/splash/splash.png", "splash png switch failed" );
+		}
+	}
 	run( "git commit -n -a -m 'Release of $version'", "release commit failed" );
 	run( "git tag $reltag -m 'Version $version'", "tag failed" );
 }
@@ -218,7 +231,7 @@ ($$)
 		$newminor=99;
 	}
 
-	run( "perl -i -pe \"s#Earlier versions of the documentation are also available on the QGIS website:#\$&\\n<a href=\\\"https://qgis.org/api/$apiv\\\">$apiv" . ($doltr ? " (LTR)" : "") . "</a>#\" doc/index.dox", "index.dox update failed");
+	run( "perl -i -pe \"s#Earlier versions of the documentation are also available on the QGIS website:#\$&\\n<a href=\\\"https://qgis.org/api/$apiv\\\">$apiv" . ($doltr ? " (LTR)" : "") . "</a>,#\" doc/index.dox", "index.dox update failed");
 
 	updateCMakeLists($newmajor,$newminor,0,"Master");
 	run( "cp /tmp/changelog debian", "restore changelog failed" );
@@ -263,7 +276,15 @@ =head1 SYNOPSIS
 			a major release
 
   Major and minor releases also require a new splash screen
-  images/splash/splash-M.N.png.
+  images/splash/splash-M.Nrc.png, which should have a label
+  "release candidate".
+
+  The first point release also requires a new splash screen
+  images/splash/splash-M.N.png without that label.
+
+  The fourth point release of a ltr branch requires a new splash screen
+  images/splash/splash-M.Nltr.png with the label "long-term
+  release".
 
   A pre-major minor release also produces a second branch
   master_$currentmajor to allow more interim minor releases