/
merge.go
70 lines (62 loc) · 2.07 KB
/
merge.go
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// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package commands
import (
"github.com/spf13/cobra"
"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
"sigs.k8s.io/kustomize/cmd/config/runner"
"sigs.k8s.io/kustomize/kyaml/kio"
"sigs.k8s.io/kustomize/kyaml/kio/filters"
)
func GetMergeRunner(name string) *MergeRunner {
r := &MergeRunner{}
c := &cobra.Command{
Use: "merge [SOURCE_DIR...] [DESTINATION_DIR]",
Short: commands.MergeShort,
Long: commands.MergeLong,
Example: commands.MergeExamples,
RunE: r.runE,
Deprecated: "this will no longer be available in kustomize v5.",
}
runner.FixDocs(name, c)
r.Command = c
r.Command.Flags().BoolVar(&r.InvertOrder, "invert-order", false,
"if true, merge Resources in the reverse order")
return r
}
func MergeCommand(name string) *cobra.Command {
return GetMergeRunner(name).Command
}
// MergeRunner contains the run function
type MergeRunner struct {
Command *cobra.Command
InvertOrder bool
}
func (r *MergeRunner) runE(c *cobra.Command, args []string) error {
var inputs []kio.Reader
// add the packages in reverse order -- the arg list should be highest precedence first
// e.g. merge from -> to, but the MergeFilter is highest precedence last
for i := len(args) - 1; i >= 0; i-- {
inputs = append(inputs, kio.LocalPackageReader{PackagePath: args[i]})
}
// if there is no "from" package, read from stdin
rw := &kio.ByteReadWriter{
Reader: c.InOrStdin(),
Writer: c.OutOrStdout(),
KeepReaderAnnotations: true,
}
if len(inputs) < 2 {
inputs = append(inputs, rw)
}
// write to the "to" package if specified
var outputs []kio.Writer
if len(args) != 0 {
outputs = append(outputs, kio.LocalPackageWriter{PackagePath: args[len(args)-1]})
}
// if there is no "to" package, write to stdout
if len(outputs) == 0 {
outputs = append(outputs, rw)
}
filters := []kio.Filter{filters.MergeFilter{}, filters.FormatFilter{}}
return runner.HandleError(c, kio.Pipeline{Inputs: inputs, Filters: filters, Outputs: outputs}.Execute())
}