Combine Craftbukkit, Bukkit, Spigot, and Paper

make_super_repo.sh

rm -rf nms Paper
mkdir -p work && cd work
repo=https://github.com/PaperMC/Paper.git
if [[ -n $1 ]]; then
  repo=https://github.com/$1.git
fi
branch=master
if [[ -n $2 ]]; then
  branch=$2
fi
# setup upstream
echo "Setting up BuildTools..."
if [[ ! -e BuildTools.jar ]]; then
  curl -# -o "BuildTools.jar" "https://hub.spigotmc.org/jenkins/job/BuildTools/lastBuild/artifact/target/BuildTools.jar"
fi
rm -rf CraftBukkit
rm -rf Bukkit
java -jar BuildTools.jar --rev 1.19.1 --compile NONE
cd Spigot/Spigot-Server
# create patches for nms-specific stuff
echo "Creating Spigot NMS patches..."
git format-patch -q -o ../../../nms/spigot/ --no-stat -N origin/patched -- src/main/java/net/minecraft/
cd ../../../nms/spigot
for file in *; do
  mv $file `echo $file | sed -E 's/^[0-9]{4}-//'`
done


# setup Paper
echo "Setting up Paper..."
cd ../../work
if [[ ! -d Paper ]]; then
  git clone https://github.com/PaperMC/Paper.git -b $branch --single-branch
fi
cd Paper
git reset --hard &>/dev/null
git checkout -q $branch &>/dev/null
git pull -q
git branch -D -q delete &>/dev/null
./gradlew applyPatches
cd Paper-Server
# create 0001-Initial.patch for the remap commit
echo "Created nms remap patch for CB source"
git format-patch -q -o ../.. --no-stat -N --zero-commit --full-index --no-signature -1 base

# create patches for nms-specific stuff
git format-patch -q -o ../../../nms/paper/ --no-stat -N --zero-commit --full-index --no-signature base -- src/main/java/net/minecraft
cd ../../../nms/paper
for file in *; do
  mv $file `echo $file | sed -E 's/^[0-9]{4}-//'`
done
echo "Created Paper NMS patches"

# commit deletion of all unneeded files
cd ../../work/Paper
git checkout -q -b delete
rm -rf patches work
rm .gitmodules
git add patches work .gitmodules &>/dev/null
git commit -q -m "OWW! THAT FORK IS HARD"
git checkout -q $branch

# CraftBukkit
cd ../CraftBukkit
git checkout -q -b work

# apply spigot's server patches
mkdir -p nms-patches/spigot
num=1
for file in ../Spigot/Craftbukkit-Patches/*; do
  git am --ignore-whitespace --exclude="src/main/java/net/minecraft/*" $file
  patch=`echo $file | sed -E 's/..\/Spigot\/Craftbukkit-Patches\/[0-9]{4}-//'`
  if [[ -e ../../nms/spigot/$patch ]]; then
    new_file=`echo "$(printf '%0*d' 4 $num)-${patch}"`
    mv ../../nms/spigot/$patch nms-patches/spigot/$new_file
    git add nms-patches/spigot/$new_file
    git commit -q --amend --no-edit
    ((num++))
  fi
done

# rewrite craftbukkit commits' authors and messages
git filter-repo --refs work --path-glob="*.java" --path="nms-patches/" --path=".gitignore" --path="src/main/resources/" --path="pom.xml" --force --commit-callback "
commit.message         = bytes(commit.message.decode('utf-8') + '(' + commit.author_name.decode('utf-8') + ' <' + commit.author_email.decode('utf-8') + '>)', 'utf-8')
commit.author_name     = bytes('CraftBukkit', 'utf-8')
commit.author_email    = bytes('craftbukkit@github.com', 'utf-8')
commit.committer_name  = commit.author_name
commit.committer_email = commit.author_email
commit.committer_date  = commit.author_date"

# apply remapping patch
# 0001-Initial.patch is just a patch of the commit that applies the mojmap remapping to the server
git am --exclude="src/main/java/net/minecraft/*" --exclude="nms-patches/*" --exclude=CONTRIBUTING.md --exclude=applyPatches.sh --exclude=makePatches.sh --exclude=README.md ../0001-Initial.patch

# apply paper's server patches
mkdir -p nms-patches/paper
num=1
for file in ../Paper/patches/server/*; do
  git am --ignore-whitespace --exclude="src/main/java/net/minecraft/*" $file
  patch=`echo $file | sed -E 's/..\/Paper\/patches\/server\/[0-9]{4}-//'`
  if [[ -e ../../nms/paper/$patch ]]; then
    new_file=`echo "$(printf '%0*d' 4 $num)-${patch}"`
    mv ../../nms/paper/$patch nms-patches/paper/$new_file
    git add nms-patches/paper/$new_file
    git commit -q --amend --no-edit
    ((num++))
  fi
done

# move to "server" directory
git filter-repo --refs work --to-subdirectory-filter server --force --commit-callback "
commit.committer_name  = commit.author_name
commit.committer_email = commit.author_email
commit.committer_date  = commit.author_date"

# Bukkit
cd ../Bukkit
git checkout -b work

# apply spigot's api patches
git am ../Spigot/Bukkit-Patches/*.patch

# filter out unimportant history
git filter-repo --refs work --use-base-name --path-glob="*.java" --path=".gitignore" --path="pom.xml" --force

# rewrite bukkit commits' authors and messages
git filter-repo --refs work --force --commit-callback "
commit.message         = bytes(commit.message.decode('utf-8') + '(' + commit.author_name.decode('utf-8') + ' <' + commit.author_email.decode('utf-8') + '>)', 'utf-8')
commit.author_name     = bytes('CraftBukkit', 'utf-8')
commit.author_email    = bytes('craftbukkit@github.com', 'utf-8')
commit.committer_name  = commit.author_name
commit.committer_email = commit.author_email
commit.committer_date  = commit.author_date"

# apply paper's api patches
git am --ignore-whitespace ../Paper/patches/api/*.patch

# move to "api" directory
git filter-repo --refs work --to-subdirectory-filter api --force --commit-callback "
commit.committer_name  = commit.author_name
commit.committer_email = commit.author_email
commit.committer_date  = commit.author_date"

# setup final Paper repo
cd ../..
mkdir Paper && cd Paper && git init -q
git remote add bukkit ../work/Bukkit
git remote add craftbukkit ../work/CraftBukkit
git remote add paper ../work/Paper
git fetch bukkit && git fetch craftbukkit && git fetch paper
git merge bukkit/work --no-edit --allow-unrelated-histories
git merge craftbukkit/work --no-edit --allow-unrelated-histories
git merge paper/delete --no-edit --allow-unrelated-histories