Merge pull request #1840 from tiborvass/cli-plugin-aliases

cli-plugins: alias an existing allowed command (only builder for now)

cli/command/builder/cmd.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
+	"github.com/docker/cli/cli/command/image"
 )
 
 // NewBuilderCommand returns a cobra command for `builder` subcommands
@@ -18,6 +19,7 @@ func NewBuilderCommand(dockerCli command.Cli) *cobra.Command {
 	}
 	cmd.AddCommand(
 		NewPruneCommand(dockerCli),
+		image.NewBuildCommand(dockerCli),
 	)
 	return cmd
 }

cli/command/utils.go

@@ -161,3 +161,34 @@ func ValidateOutputPathFileMode(fileMode os.FileMode) error {
 	}
 	return nil
 }
+
+func stringSliceIndex(s, subs []string) int {
+	j := 0
+	if len(subs) > 0 {
+		for i, x := range s {
+			if j < len(subs) && subs[j] == x {
+				j++
+			} else {
+				j = 0
+			}
+			if len(subs) == j {
+				return i + 1 - j
+			}
+		}
+	}
+	return -1
+}
+
+// StringSliceReplaceAt replaces the sub-slice old, with the sub-slice new, in the string
+// slice s, returning a new slice and a boolean indicating if the replacement happened.
+// requireIdx is the index at which old needs to be found at (or -1 to disregard that).
+func StringSliceReplaceAt(s, old, new []string, requireIndex int) ([]string, bool) {
+	idx := stringSliceIndex(s, old)
+	if (requireIndex != -1 && requireIndex != idx) || idx == -1 {
+		return s, false
+	}
+	out := append([]string{}, s[:idx]...)
+	out = append(out, new...)
+	out = append(out, s[idx+len(old):]...)
+	return out, true
+}

cli/command/utils_test.go

@@ -0,0 +1,33 @@
+package command
+
+import (
+	"testing"
+
+	"gotest.tools/assert"
+)
+
+func TestStringSliceReplaceAt(t *testing.T) {
+	out, ok := StringSliceReplaceAt([]string{"abc", "foo", "bar", "bax"}, []string{"foo", "bar"}, []string{"baz"}, -1)
+	assert.Assert(t, ok)
+	assert.DeepEqual(t, []string{"abc", "baz", "bax"}, out)
+
+	out, ok = StringSliceReplaceAt([]string{"foo"}, []string{"foo", "bar"}, []string{"baz"}, -1)
+	assert.Assert(t, !ok)
+	assert.DeepEqual(t, []string{"foo"}, out)
+
+	out, ok = StringSliceReplaceAt([]string{"abc", "foo", "bar", "bax"}, []string{"foo", "bar"}, []string{"baz"}, 0)
+	assert.Assert(t, !ok)
+	assert.DeepEqual(t, []string{"abc", "foo", "bar", "bax"}, out)
+
+	out, ok = StringSliceReplaceAt([]string{"foo", "bar", "bax"}, []string{"foo", "bar"}, []string{"baz"}, 0)
+	assert.Assert(t, ok)
+	assert.DeepEqual(t, []string{"baz", "bax"}, out)
+
+	out, ok = StringSliceReplaceAt([]string{"abc", "foo", "bar", "baz"}, []string{"foo", "bar"}, nil, -1)
+	assert.Assert(t, ok)
+	assert.DeepEqual(t, []string{"abc", "baz"}, out)
+
+	out, ok = StringSliceReplaceAt([]string{"foo"}, nil, []string{"baz"}, -1)
+	assert.Assert(t, !ok)
+	assert.DeepEqual(t, []string{"foo"}, out)
+}