0d107c742a
This change restructures the test framework code a bit, to make it easier to introduce additional languages. Our knowledge of Yarn and Node.js project structure, for instance, was previously baked in to the test logic, in a way that was hard to make, for instance, Yarn optional. (In Python, of course, it will not be used.) To better support this, I've moved some state onto a new programTester struct that we can use to lazily find binaries required during the testing (such as Yarn, Pip, and so on). I'm committing this separately so that I can minimize merge conflicts in the Python work.
90 lines
2.2 KiB
Go
90 lines
2.2 KiB
Go
// Copyright 2016-2017, Pulumi Corporation. All rights reserved.
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package integration
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import (
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"bytes"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"time"
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"github.com/pkg/errors"
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"github.com/pulumi/pulumi/pkg/resource"
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"github.com/pulumi/pulumi/pkg/util/contract"
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)
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// getCmdBin returns the binary named bin in location loc or, if it hasn't yet been initialized, will lazily
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// populate it by either using the default def or, if empty, looking on the current $PATH.
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func getCmdBin(loc *string, bin, def string) (string, error) {
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if *loc == "" {
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*loc = def
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if *loc == "" {
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var err error
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*loc, err = exec.LookPath(bin)
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if err != nil {
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return "", errors.Wrapf(err, "Expected to find `%s` binary on $PATH", bin)
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}
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}
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}
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return *loc, nil
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}
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func uniqueSuffix() string {
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// .<timestamp>.<five random hex characters>
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timestamp := time.Now().Format("20060102-150405")
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suffix, err := resource.NewUniqueHex("."+timestamp+".", 5, -1)
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contract.AssertNoError(err)
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return suffix
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}
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func writeCommandOutput(commandName, runDir string, output []byte) (string, error) {
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logFileDir := filepath.Join(runDir, "command-output")
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if err := os.MkdirAll(logFileDir, 0700); err != nil {
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return "", errors.Wrapf(err, "Failed to create '%s'", logFileDir)
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}
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logFile := filepath.Join(logFileDir, commandName+uniqueSuffix()+".log")
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if err := ioutil.WriteFile(logFile, output, 0644); err != nil {
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return "", errors.Wrapf(err, "Failed to write '%s'", logFile)
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}
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return logFile, nil
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}
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type prefixer struct {
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writer io.Writer
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prefix []byte
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anyOutput bool
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}
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// newPrefixer wraps an io.Writer, prepending a fixed prefix after each \n emitting on the wrapped writer
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func newPrefixer(writer io.Writer, prefix string) *prefixer {
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return &prefixer{writer, []byte(prefix), false}
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}
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var _ io.Writer = (*prefixer)(nil)
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func (prefixer *prefixer) Write(p []byte) (int, error) {
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n := 0
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lines := bytes.SplitAfter(p, []byte{'\n'})
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for _, line := range lines {
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if len(line) > 0 {
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_, err := prefixer.writer.Write(prefixer.prefix)
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if err != nil {
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return n, err
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}
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}
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m, err := prefixer.writer.Write(line)
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n += m
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if err != nil {
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return n, err
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}
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}
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return n, nil
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}
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