Vendor dependencies for GCS

vendor/cloud.google.com/go/run-tests.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+
+# Selectively run tests for this repo, based on what has changed
+# in a commit. Runs short tests for the whole repo, and full tests
+# for changed directories.
+
+set -e
+
+prefix=cloud.google.com/go
+
+dryrun=false
+if [[ $1 == "-n" ]]; then
+  dryrun=true
+  shift
+fi
+
+if [[ $1 == "" ]]; then
+  echo >&2 "usage: $0 [-n] COMMIT"
+  exit 1
+fi
+
+# Files or directories that cause all tests to run if modified.
+declare -A run_all
+run_all=([.travis.yml]=1 [run-tests.sh]=1)
+
+function run {
+  if $dryrun; then
+    echo $*
+  else
+    (set -x; $*)
+  fi
+}
+
+
+# Find all the packages that have changed in this commit.
+declare -A changed_packages
+
+for f in $(git diff-tree --no-commit-id --name-only -r $1); do
+  if [[ ${run_all[$f]} == 1 ]]; then
+    # This change requires a full test. Do it and exit.
+    run go test -race -v $prefix/...
+    exit
+  fi
+  # Map, e.g., "spanner/client.go" to "$prefix/spanner".
+  d=$(dirname $f)
+  if [[ $d == "." ]]; then
+    pkg=$prefix
+  else
+    pkg=$prefix/$d
+  fi
+  changed_packages[$pkg]=1
+done
+
+echo "changed packages: ${!changed_packages[*]}"
+
+
+# Reports whether its argument, a package name, depends (recursively)
+# on a changed package.
+function depends_on_changed_package {
+  # According to go list, a package does not depend on itself, so
+  # we test that separately.
+  if [[ ${changed_packages[$1]} == 1 ]]; then
+    return 0
+  fi
+  for dep in $(go list -f '{{range .Deps}}{{.}} {{end}}' $1); do
+    if [[ ${changed_packages[$dep]} == 1 ]]; then
+      return 0
+    fi
+  done
+  return 1
+}
+
+# Collect the packages into two separate lists. (It is faster go test a list of
+# packages than to individually go test each one.)
+
+shorts=
+fulls=
+for pkg in $(go list $prefix/...); do      # for each package in the repo
+  if depends_on_changed_package $pkg; then # if it depends on a changed package
+    fulls="$fulls $pkg"                    # run the full test
+  else                                     # otherwise
+    shorts="$shorts $pkg"                  # run the short test
+  fi
+done
+run go test -race -v -short $shorts
+run go test -race -v $fulls