diff --git a/.github/workflows/copy-svn.yml b/.github/workflows/copy-svn.yml
new file mode 100644
index 00000000..a6fa2e8c
--- /dev/null
+++ b/.github/workflows/copy-svn.yml
@@ -0,0 +1,129 @@
+# to boostrap this action, create an empty repo with just this file and svn-authors
+# run the action once with force parameter set to "yes"
+
+# git commit -m "xxx" * && git push -f && gh workflow run -R kichik/nsis-travis copy-svn.yml -f force=yes
+
+name: Copy from SourceForge Subversion
+on: 
+  workflow_dispatch:
+    inputs:
+      force:
+        description: 'Force push (CAREFUL!)'     
+        required: false
+
+jobs:
+  copy:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+          
+      - name: Install git-svn
+        run: sudo add-apt-repository ppa:git-core/ppa && sudo apt update && sudo apt install git-svn
+        
+      - name: Configure git
+        run: |
+          git config --global user.email "kichik@gmail.com"
+          git config --global user.name "Amir Szekely"
+                  
+      - name: Restore cache
+        id: restore-cache
+        run: |
+          if git fetch origin svn2git-cache; then
+            git checkout svn2git-cache
+          else
+            git checkout --orphan svn2git-cache
+            git rm -rf --cached .
+            git add .github/workflows/*
+            git commit -m "Empty cache"
+            echo '::set-output name=cache-hit::false'
+          fi
+          
+          if [ -f svn2git-cache.tar.gz ]; then
+            tar xzf svn2git-cache.tar.gz
+            echo '::set-output name=cache-hit::true'
+          else
+            echo '::set-output name=cache-hit::false'
+          fi
+
+      - name: Initial SVN clone
+        if: steps.restore-cache.outputs.cache-hit != 'true'
+        run: |
+          git svn clone -A.github/workflows/svn-authors -s https://svn.code.sf.net/p/nsis/code/NSIS svn2git
+
+      - name: SVN fetch
+        working-directory: svn2git
+        run: |
+          git svn fetch --fetch-all
+          git svn rebase
+          
+      - name: SVN branches
+        working-directory: svn2git
+        run: |
+          for remote_branch in $(git branch -r | grep -v /tags/); do
+            if echo $remote_branch | grep @; then
+              echo ignoring weird branch $remote_branch
+              continue
+            fi
+            
+            local_branch=`echo $remote_branch | cut -d / -f 2-`
+            git checkout -b "$local_branch" "$remote_branch" || git checkout "$local_branch"
+            git svn rebase
+          done
+          git checkout master
+          
+      - name: SVN tags
+        working-directory: svn2git
+        run: |
+          git tag
+        
+          git for-each-ref --format="%(refname:short) %(objectname)" refs/remotes/origin/tags \
+          | while read BRANCH REF
+            do
+                  TAG_NAME=`echo $BRANCH | cut -d / -f 3-`
+                  BODY="$(git log -1 --format=format:%B $REF)"
+
+                  echo "ref=$REF parent=$(git rev-parse $REF^) tagname=$TAG_NAME body=$BODY" >&2
+                  git tag -l "$TAG_NAME"
+                  echo XXX
+
+                  if [ $(git tag -l "$TAG_NAME") ]; then
+                    echo tag already exists
+                  else
+                    git tag -a -m "$BODY" $TAG_NAME $REF^
+                    #git branch -r -d $BRANCH
+                  fi
+            done
+      
+      - name: Setup GitHub access
+        env:
+          SSH_KEY: ${{ secrets.SSH_KEY }}
+        run: |
+          mkdir -p ~/.ssh
+          touch ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          echo "$SSH_KEY" >> ~/.ssh/id_ed25519
+      
+      - name: Push to GitHub
+        working-directory: svn2git
+        run: |
+          flags=""
+          if [[ "${{ github.event.inputs.force }}" = "yes" ]]; then
+            flags="--force"
+          fi
+          remote_repo="git@github.com:${GITHUB_REPOSITORY}.git"
+          git push "$remote_repo" --all $flags
+          git push "$remote_repo" --tags $flags
+          
+      - name: GC
+        working-directory: svn2git
+        run: |
+          echo run garbage collection so caching does not fail while files are changing
+          git gc --auto
+          
+      - name: Save cache
+        run: |
+          rm -f svn2git-cache.tar.gz
+          tar czf svn2git-cache.tar.gz svn2git
+          git add svn2git-cache.tar.gz
+          git commit --amend -m "update cache" svn2git-cache.tar.gz
+          git push --force origin svn2git-cache
diff --git a/.github/workflows/svn-authors b/.github/workflows/svn-authors
new file mode 100644
index 00000000..0e8f79d2
--- /dev/null
+++ b/.github/workflows/svn-authors
@@ -0,0 +1,25 @@
+(no author) = No Author <no_author@no_author>
+anoncvs_ezcontents = No Author <no_author@no_author>
+anders_k = Anders <anders_k@users.sourceforge.net>
+eccles = Dave Laundon <eccles@users.sourceforge.net>
+joostverburg = Joost Verburg <joostverburg@users.sourceforge.net>
+justin1014 = Justin Frankel <justin1014@users.sourceforge.net>
+kichik = Amir Szekely <kichik@users.sourceforge.net>
+sunjammerx = Ximon Eighteen <sunjammerx@users.sourceforge.net>
+afrow_uk = Stuart <afrow_uk@users.sourceforge.net>
+ballison = Ben Allison <ballison@users.sourceforge.net>
+f0rt = f0rt <f0rt@users.sourceforge.net>
+flizebogen = Flizebogen <flizebogen@users.sourceforge.net>
+gavenkoa = Oleksandr Gavenko <gavenkoa@users.sourceforge.net>
+golubdr = David Golub <golubdr@users.sourceforge.net>
+icemank = Sunil Kamath <icemank@users.sourceforge.net>
+jimpark = Jim Park <jimpark@users.sourceforge.net>
+oripel = Ori Peleg <oripel@users.sourceforge.net>
+pabs3 = Paul Wise <pabs3@users.sourceforge.net>
+ramon18 = Ramon <ramon18@users.sourceforge.net>
+whyeye = Jan T. Sott <whyeye@users.sourceforge.net>
+wizou = Wizou <wizou@users.sourceforge.net>
+rainwater = Robert Rainwater <rainwater@users.sourceforge.net>
+uid27073 = Robert Rainwater <rainwater@users.sourceforge.net>
+zarg = zarg <zarg@users.sourceforge.net>
+o_owd = o_owd <o_owd@users.sourceforge.net>