зеркало из https://github.com/microsoft/docker.git
88 строки
2.2 KiB
Go
88 строки
2.2 KiB
Go
package utils
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import (
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"fmt"
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"io/ioutil"
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"os"
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"runtime"
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"strings"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/stringid"
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)
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var globalTestID string
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// TestDirectory creates a new temporary directory and returns its path.
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// The contents of directory at path `templateDir` is copied into the
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// new directory.
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func TestDirectory(templateDir string) (dir string, err error) {
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if globalTestID == "" {
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globalTestID = stringid.GenerateNonCryptoID()[:4]
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}
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prefix := fmt.Sprintf("docker-test%s-%s-", globalTestID, GetCallerName(2))
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if prefix == "" {
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prefix = "docker-test-"
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}
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dir, err = ioutil.TempDir("", prefix)
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if err = os.Remove(dir); err != nil {
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return
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}
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if templateDir != "" {
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if err = archive.CopyWithTar(templateDir, dir); err != nil {
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return
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}
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}
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return
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}
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// GetCallerName introspects the call stack and returns the name of the
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// function `depth` levels down in the stack.
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func GetCallerName(depth int) string {
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// Use the caller function name as a prefix.
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// This helps trace temp directories back to their test.
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pc, _, _, _ := runtime.Caller(depth + 1)
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callerLongName := runtime.FuncForPC(pc).Name()
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parts := strings.Split(callerLongName, ".")
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callerShortName := parts[len(parts)-1]
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return callerShortName
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}
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// ReplaceOrAppendEnvValues returns the defaults with the overrides either
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// replaced by env key or appended to the list
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func ReplaceOrAppendEnvValues(defaults, overrides []string) []string {
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cache := make(map[string]int, len(defaults))
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for i, e := range defaults {
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parts := strings.SplitN(e, "=", 2)
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cache[parts[0]] = i
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}
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for _, value := range overrides {
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// Values w/o = means they want this env to be removed/unset.
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if !strings.Contains(value, "=") {
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if i, exists := cache[value]; exists {
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defaults[i] = "" // Used to indicate it should be removed
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}
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continue
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}
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// Just do a normal set/update
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parts := strings.SplitN(value, "=", 2)
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if i, exists := cache[parts[0]]; exists {
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defaults[i] = value
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} else {
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defaults = append(defaults, value)
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}
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}
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// Now remove all entries that we want to "unset"
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for i := 0; i < len(defaults); i++ {
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if defaults[i] == "" {
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defaults = append(defaults[:i], defaults[i+1:]...)
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i--
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}
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}
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return defaults
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}
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