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

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#!/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
if [[ $fulls != "" ]]; then
run go test -race -v $fulls
fi