Merge branch 'install-mode'

Closes #483

install.sh

@@ -17,4 +17,4 @@ SHARE_PATH="${PREFIX}/share/ruby-build"
 mkdir -p "$BIN_PATH" "$SHARE_PATH"
 
 install -p bin/* "$BIN_PATH"
-install -p share/ruby-build/* "$SHARE_PATH"
+install -p -m 0644 share/ruby-build/* "$SHARE_PATH"

test/installer.bats

@@ -17,6 +17,18 @@ load test_helper
   assert [ -e share/ruby-build/ree-1.8.7-2012.02 ]
 }
 
+@test "build definitions don't have the executable bit" {
+  cd "$TMP"
+  PREFIX="${PWD}/usr" run "${BATS_TEST_DIRNAME}/../install.sh"
+  assert_success ""
+
+  run $BASH -c 'ls -l usr/share/ruby-build | tail -2 | cut -d" " -f1'
+  assert_output <<OUT
+-rw-r--r--
+-rw-r--r--
+OUT
+}
+
 @test "overwrites old installation" {
   cd "$TMP"
   mkdir -p bin share/ruby-build