install

#!/usr/bin/env bash

set -eou pipefail

# which release to install and where to download it from
# (point RAW_URL at a mirror or a fork to install from
# somewhere else)
VERSION="${BASHCARDS_VERSION:-0.2.0}"
RAW_URL="${BASHCARDS_RAW_URL:-https://raw.githubusercontent.com/rpearce/bashcards}"

# where to put it: your home directory, so there's no need
# for sudo, unless you're root (like under sudo), in which
# case it goes where everyone can use it
if [ "$EUID" -eq 0 ]; then
  PREFIX="${PREFIX:-/usr/local}"
else
  PREFIX="${PREFIX:-$HOME/.local}"
fi

RELEASE_URL="$RAW_URL/v$VERSION"
TMP_DIR="$(mktemp -d)"

trap 'rm -rf "$TMP_DIR"' EXIT

install_bashcards() {
  # download everything first, so a failed download
  # can't leave a half-written bashcards behind
  curl -fsSL "$RELEASE_URL/bashcards" -o "$TMP_DIR/bashcards"
  curl -fsSL "$RELEASE_URL/bashcards.1" -o "$TMP_DIR/bashcards.1"

  install -d "$PREFIX/bin" "$PREFIX/share/man/man1"
  install -m 0755 "$TMP_DIR/bashcards" "$PREFIX/bin/bashcards"
  install -m 0644 "$TMP_DIR/bashcards.1" "$PREFIX/share/man/man1/bashcards.1"

  echo "Installed $PREFIX/bin/bashcards and its man page from $RELEASE_URL"

  # ~/.local/bin isn't on everyone's PATH (like on macOS);
  # once it is, man finds the man page next to it, too
  case ":$PATH:" in
    *":$PREFIX/bin:"*) ;;
    *)
      echo ""
      echo "$PREFIX/bin isn't on your PATH, so add this line to your shell's"
      echo "startup file (like ~/.bashrc or ~/.zshrc) and open a new terminal:"
      echo ""
      echo "  export PATH=\"$PREFIX/bin:\$PATH\""
      ;;
  esac
}

install_bashcards