Improve helper scripts

Note: Still to be tested (when upgrading to Qt 5.11.0).

devel/qt5/continue-rebase-patches.sh

@@ -0,0 +1,26 @@
+#set -euxo pipefail
+set -e # abort on first error
+shopt -s nullglob
+
+if ! [[ $1 ]] || ! [[ $2 ]]; then
+    echo 'No version specified, must specify the new and old version, eg. 5.9.2 5.9.1'
+    echo "Usage: $0 newversion"
+    exit -1
+fi
+newversion="$1"
+
+# determine remote to push
+remote=
+for maybe_remote in 'martchus' 'origin'; do
+    if git remote get-url $maybe_remote; then
+        remote=$maybe_remote
+        break
+    fi
+done
+if ! [[ $remote ]]; then
+    echo "Unable to detect remote"
+    exit -2
+fi
+
+git cherry-pick --continue
+git push -u $maybe_remote "$newversion-mingw-w64"

devel/qt5/rebase-patches.sh

@@ -4,12 +4,25 @@ shopt -s nullglob
 
 if ! [[ $1 ]] || ! [[ $2 ]]; then
     echo 'No version specified, must specify the new and old version, eg. 5.9.2 5.9.1'
-    echo "Usage: $0 newversion oldversion"
+    echo "Usage: $0 newversion oldversion [old-branch-suffix]"
     exit -1
 fi
 newversion="$1"
 oldversion="$2"
+oldbranchsuffix="$3"
 
+# determine branch from old version
+oldversionbranch="$oldversion-mingw-w64"
+if [[ $oldbranchsuffix ]] \
+    && oldversionbranch="$oldversionbranch-$oldbranchsuffix"
+if [[ $(git branch | grep "$oldversionbranch" | wc -l) -gt 1 ]]; then
+    echo 'Which of the following branches was the latest for the old version?'
+    git branch | grep "$oldversionbranch"
+    echo 'Please disambiguate by specifying the corresponding suffix as 3rd argument.'
+    exit -1
+fi
+
+# determine remote to push
 remote=
 for maybe_remote in 'martchus' 'origin'; do
     if git remote get-url $maybe_remote; then
@@ -17,13 +30,13 @@ for maybe_remote in 'martchus' 'origin'; do
         break
     fi
 done
-
 if ! [[ $remote ]]; then
     echo "Unable to detect remote"
     exit -2
 fi
 
+# update Git checkout, create new branch with rebased commits, push to remote
 git remote update
 git checkout -b "$newversion-mingw-w64" "v$newversion"
-git cherry-pick "v$oldversion..$oldversion"-mingw-w64
+git cherry-pick "v$oldversion..$oldversionbranch"
 git push -u $maybe_remote "$newversion-mingw-w64"