pybin.sh

#!/usr/bin/env sh

set -e

generate_entry_script() {
  TARGET_BIN="$1"
  ENTRY_SCRIPT="$ENV_DIR/$TARGET_BIN"
  printf "#!/usr/bin/env sh\nexec \"%s/bin/%s\" \"%s/bin/%s\" \"\$@\"\n" "$ENV_DIR" "$PYTHON_BIN" "$ENV_DIR" "$TARGET_BIN" > "$ENTRY_SCRIPT"
  chmod +x "$ENTRY_SCRIPT"
  echo "ln -s \"$ENTRY_SCRIPT\""
}

ENV_DIR="$HOME/.pybin/$1"
PYTHON_BIN=${2:-"python3"}

if [ -n "$3" ]; then
  generate_entry_script "$3"
else
  rm -rf "$ENV_DIR"
  virtualenv -p "$PYTHON_BIN" "$ENV_DIR"
  echo "source $ENV_DIR/bin/activate"
  generate_entry_script "$1"
fi