setup.sh

#!/usr/bin/env bash
# setup.sh — install codesync under $HOME/.codesync, put it on your PATH, and
# seed the default config. Layout it creates:
#
#   $HOME/.codesync/env/            the virtualenv (Python + PyYAML)
#   $HOME/.codesync/bin/codesync    link to this repo's launcher (room for more)
#   ~/.local/bin/codesync           symlink on your PATH
#   ~/.config/codesync/codesync.yaml   default config (seeded once)
set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT="$HOME/.codesync"
ENV_DIR="$ROOT/env"
BIN_DIR="$ROOT/bin"
LOCAL_BIN="$HOME/.local/bin"
CONFIG_DIR="$HOME/.config/codesync"
CONFIG_FILE="$CONFIG_DIR/codesync.yaml"

# Migrate the old layout, where the venv lived directly in $HOME/.codesync.
if [ -f "$ROOT/pyvenv.cfg" ]; then
    echo "Migrating old venv layout in $ROOT ..."
    rm -rf "$ROOT"
fi

echo "Creating virtualenv at $ENV_DIR ..."
mkdir -p "$BIN_DIR"
python3 -m venv "$ENV_DIR"

echo "Installing PyYAML into the venv ..."
"$ENV_DIR/bin/python" -m pip install pyyaml

echo "Linking the codesync binary ..."
chmod +x "$HERE/codesync"
mkdir -p "$LOCAL_BIN"
ln -sf "$HERE/codesync" "$BIN_DIR/codesync"          # $HOME/.codesync/bin/codesync -> repo
ln -sf "$BIN_DIR/codesync" "$LOCAL_BIN/codesync"     # ~/.local/bin/codesync -> the above

echo "Seeding default config at $CONFIG_FILE ..."
mkdir -p "$CONFIG_DIR"
if [ -e "$CONFIG_FILE" ]; then
    echo "  already exists — leaving it untouched"
else
    cp "$HERE/codesync.yaml" "$CONFIG_FILE"
    echo "  copied from the sample — edit it to define your systems"
fi

# Put ~/.local/bin on PATH via the rc file for the user's shell (idempotent).
case "${SHELL:-}" in
    *zsh)  RC="$HOME/.zshrc" ;;
    *bash) RC="$HOME/.bashrc" ;;
    *)     RC="$HOME/.profile" ;;
esac
PATH_LINE='export PATH="$HOME/.local/bin:$PATH"'
ADDED_PATH=0
if ! grep -qsF "$PATH_LINE" "$RC"; then
    printf '\n# Added by codesync setup — put ~/.local/bin on PATH\n%s\n' "$PATH_LINE" >> "$RC"
    ADDED_PATH=1
    echo "Added ~/.local/bin to PATH in $RC"
else
    echo "~/.local/bin already on PATH via $RC"
fi

cat <<EOF

codesync is installed.
  venv:    $ENV_DIR
  binary:  $BIN_DIR/codesync  (linked from $LOCAL_BIN/codesync)
  config:  $CONFIG_FILE

Try it (no venv activation needed — it re-execs into the venv itself):
    codesync <system> <location>        # push (the default)
    codesync pull <system> <location>   # remote -> local
EOF
if [ "$ADDED_PATH" = "1" ]; then
    echo "Open a new terminal, or run:  source $RC   (so codesync is on your PATH)"
fi