Add install script

install.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+REMOTE=${REMOTE:-https://github.com/bpkg/bpkg.git}
+TMPDIR=${TMPDIR:-/tmp}
+DEST=${DEST:-${TMPDIR}/bpkg-master}
+
+## test if command exists
+ftest () {
+  if type -f "${1}" > /dev/null 2>&1; then
+    return 1
+  else
+    return 0
+  fi
+}
+
+## feature tests
+features () {
+  for f in "${@}"; do
+    ftest "${f}" || {
+      echo &>2 "  error: Missing \`${f}'"
+      return 1
+    }
+  done
+  return 0
+}
+
+## main setup
+setup () {
+  ## test for require features
+  features git
+
+  ({
+    echo
+    cd ${TMPDIR}
+    echo "  info: pruning..."
+    test -d ${DEST} && { echo "  warn: exists: \`${DEST}'"; }
+    rm -rf ${DEST}
+    echo "  info: fetching..."
+    git clone --depth=1 ${REMOTE} ${DEST} > /dev/null 2>&1
+    cd ${DEST}
+    echo "  info: installing..."
+    echo
+    make install
+  }) >&2
+  return $?
+}
+
+setup
+exit $?