split analyze and format steps out of test.sh

tool/format.sh

Index: tool/format.sh
diff --git a/tool/format.sh b/tool/format.sh
new file mode 100755
index 0000000000000000000000000000000000000000..b3a0ce25425a186c4fac7906c6fa58b81188391f
--- /dev/null
+++ b/tool/format.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+set -e
+
+# Switch to the root directory of dev_compiler
+cd $( dirname "${BASH_SOURCE[0]}" )/..
+
+# Run formatter in rewrite mode on all files that are part of the project.
+# This checks that all files are commited first to git, so no state is lost.
+# The formatter ignores:
+#   * local files that have never been added to git,
+#   * subdirectories of test/ and tool/, unless explicitly added. Those dirs
+#     contain a lot of generated or external source we should not reformat.
+(files=`git ls-files 'bin/*.dart' 'lib/*.dart' test/*.dart test/checker/*.dart \
+  tool/*.dart | grep -v lib/src/js/`; git status -s $files | grep -q . \
+  && echo "Did not run the formatter, please commit edited files first." \
+  || (echo "Running dart formatter" ; pub run dart_style:format -w $files))