create-master-lite.sh

#!/bin/bash

set -ex

prune () {
    find . -name "*_test.go" -delete
    go mod tidy
}

# Set up initial commit on branch, using v1.7.0 as root.
git checkout v1.7.0
prune
git commit -m "create master-lite by removing tests from v1.7.0" .
git branch -f master-lite
git tag -f v1.7.0-lite

for ver in v1.7.1 v1.8.0 v1.8.1 v1.9.0; do
    git checkout $ver
    prune
    # This commit will be discard, we just want the resulting tree.
    git commit -m unused .
    tree=$(git show --no-patch --format=%T HEAD)
    # This is the actual commit.
    commit=$(git commit-tree $tree -p $(git rev-parse master-lite) -p $(git rev-parse $ver) -m $ver)
    git branch -f master-lite $commit
    git tag -f $ver-lite $commit
done

git checkout master