1 files changed, 189 insertions, 0 deletions
diff --git a/scripts/git-split.sh b/scripts/git-split.sh
new file mode 100755
index 0000000..94ac38f
--- /dev/null
+++ b/scripts/git-split.sh
@@ -0,0 +1,189 @@
+#!/usr/bin/env bash
+
+TEMP=$(getopt -o hvdymr: --long help,verbose,debug,submodule,remote:,visibility: \
+    -n 'javawrap' -- "$@")
+
+if [ $? != 0 ]; then
+    echo "Terminating..." >&2
+    exit 1
+fi
+
+if ! git rev-parse --is-inside-work-tree &>/dev/null; then
+    echo "Must be run inside a git repository" >&2
+    exit 1
+fi
+
+eval set -- "$TEMP"
+
+SCRIPT="$(basename $0)"
+
+read -r -d '' USAGE <<-EOF
+USAGE: $SCRIPT [OPTIONS]
+
+OPTIONS:
+    -h, --help                          Show this message
+    -v, --verbose                       Show more output
+    -d, --debug                         NOT IMPLEMENTED
+    -y, --confirm                       Do not prompt for confirmation
+    -m, --submodule                     
+            Migrate directory in original repository to submodule
+
+    -r, --remote=<user/repo>         
+            Github remote, defaults to $(git config user.username)/${directory}
+
+        --private                       
+            Create the new remote repository as private. It is created 
+            as public if ommited
+
+ARGS:
+    <DIRECTORY>...  Directory to split out of original repository, 
+                    defaults to current directory
+EOF
+
+VERBOSE=false
+DEBUG=false
+CONFIRMED=false
+SUBMODULE=false
+REPO=$(git rev-parse --show-toplevel)
+DIRECTORY="$(basename $(git rev-parse --show-prefix))"
+REMOTE="$(basename $DIRECTORY)/$(git config user.username)"
+VISIBILITY="--public"
+
+while true; do
+    case "$1" in
+    -h | --help)
+        echo "$USAGE"
+        exit 0
+        ;;
+    -v | --verbose)
+        VERBOSE=true
+        shift
+        ;;
+    -d | --debug)
+        DEBUG=true
+        shift
+        ;;
+    -y)
+        CONFIRMED=true
+        shift
+        ;;
+    -m | --submodule)
+        SUBMODULE=true
+        shift
+        ;;
+    -r | --remote)
+        REMOTE="$2"
+        shift 2
+        ;;
+    --public | --private)
+        VISIBILITY="$1"
+        shift
+        ;;
+    --)
+        shift
+        break
+        ;;
+    *)
+        DIRECTORY="$2"
+        shift
+        break
+        ;;
+    esac
+done
+
+if [[ "$REMOTE" = "$(basename $DIRECTORY)/$(git config user.username)" && $? -ne 0 ]]; then
+    echo "ERROR: No remote provided and user.username was not set." >&2
+    echo "$USAGE"
+    exit 1
+fi
+
+cd $REPO
+
+git subtree split -P $DIRECTORY -b $DIRECTORY
+
+cd "$(mktemp -d)"
+
+git init && git pull $REPO $DIRECTORY && git branch -M main
+
+files=(".gitignore" ".gitattributes" ".vscode" "LICENSE")
+for f in "${files[@]}"; do
+    if [ ! -e "./${f}" && -e "${REPO}/${f}" ]; then
+        printf '%s\n' "Copying ${f} to new repository..."
+        cp -r "${REPO}/${f}" ./
+    fi
+done
+
+git add -A && git commit -m "split out $DIRECTORY into submodule"
+
+# TODO check if remote already exists
+if command -v gh &>/dev/null; then
+    yes "n" | gh repo create --confirm "${REMOTE}" "${VISIBILITY}"
+else
+    printf '%s\n' 'gh cli tool could not be found. Explicitly adding git remote to your local repository.'
+    git remote add origin https://github.com/${REMOTE}
+fi
+
+if git ls-remote git@github.com:${REMOTE} &>/dev/null; then
+    git push -u origin main
+else
+    printf '%s\n' 'Remote repository not found.'
+fi
+
+if [ $? -ne 0 ]; then
+    printf '\n%s\n' 'Verify/create the remote repository and push to it with the following command: '
+    printf '\n\t%s%s%s\n\n' '`cd ' "$(pwd)" ' && git push -u origin main`'
+
+    printf '\t%s\n' \
+        '*********************************************************************************' \
+        '* The new repository was created in a temp directory!                           *' \
+        '* If the local repository is not pushed to remote, it will be lost on reboot.   *' \
+        '*********************************************************************************'
+else
+    tempdir="$(pwd)"
+    cd "$REPO"
+    rm -rf "$tempdir"
+fi
+
+# Migrate to submodule
+
+if [ "$SUBMODULE" != true ]; then
+    exit 0
+fi
+
+# TODO fix and remove warning
+
+printf 'Migrating the original subdirectory to submodule.\n'
+
+if [ "$QUIET" != true ]; then
+    printf '\t%s\n' \
+        '*************************************************************************************' \
+        '*  THIS IS NOT TESTED AND HAS A POSSIBLY OF DATA LOSS!                              *' \
+        '*                                                                                   *' \
+        '*  This runs `git rm -rf` and `rm -rf` on the original subdirectory.                *' \
+        '*  Double check you succesfully migrated the subdirectory to the new repository.    *' \
+        '*************************************************************************************'
+fi
+
+if [ "$CONFIRMED" != true ]; then
+    read -p "Proceed? (Y/n) " -n 1 -r
+    printf '\n'
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        CONFIRMED=true
+    else
+        [[ "$0" = "$BASH_SOURCE" ]] && exit 1 || return 1
+    fi
+fi
+
+cd $REPO
+
+git rm -rf $DIRECTORY
+rm -rf $DIRECTORY
+
+git submodule add git@github.com:$REMOTE $DIRECTORY
+git submodule update --init --recursive
+
+git commit -m "split out $DIRECTORY into submodule"
+
+if [ $? -ne 0 ]; then
+    printf '%s\n' 'Submodule succesfully added. Be sure to `git push -u origin main` after verifing the migration.'
+fi