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driver.go
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driver.go
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// SPDX-FileCopyrightText: 2022 SAP SE or an SAP affiliate company and Open Component Model contributors.
//
// SPDX-License-Identifier: Apache-2.0
package filesystem
import (
"io"
"github.com/mandelsoft/vfs/pkg/osfs"
"github.com/mandelsoft/vfs/pkg/vfs"
"sigs.k8s.io/yaml"
"github.com/open-component-model/ocm/pkg/errors"
"github.com/open-component-model/ocm/pkg/finalizer"
"github.com/open-component-model/ocm/pkg/toi/install"
)
const OptionTargetPath = "TARGET_PATH"
// Driver is capable of running Docker invocation images using Docker itself.
type Driver struct {
config map[string]string
Simulate bool
TargetPath string
Filesystem vfs.FileSystem
}
var _ install.Driver = (*Driver)(nil)
func New(fs vfs.FileSystem) install.Driver {
if fs == nil {
fs = osfs.New()
}
return &Driver{Filesystem: fs}
}
// SetConfig sets Docker driver configuration.
func (d *Driver) SetConfig(settings map[string]string) error {
if settings != nil {
d.TargetPath = settings[d.TargetPath]
}
if d.TargetPath == "" {
d.TargetPath = "toi"
}
d.config = settings
return nil
}
func (d *Driver) Exec(op *install.Operation) (*install.OperationResult, error) {
if d.Simulate {
return nil, nil
}
err := d.Filesystem.MkdirAll(d.TargetPath, 0o700)
if err != nil {
return nil, errors.Wrapf(err, "creating target path")
}
var finalize finalizer.Finalizer
defer finalize.Finalize()
for k, v := range op.Files {
n := vfs.Join(d.Filesystem, d.TargetPath, install.Inputs, k)
err := d.Filesystem.MkdirAll(vfs.Dir(d.Filesystem, n), 0o700)
if err != nil {
return nil, errors.Wrapf(err, "creating directory for file %q", k)
}
r, err := v.Reader()
if err != nil {
return nil, errors.Wrapf(err, "reading data for %q", k)
}
finalize.Close(r)
file, err := d.Filesystem.OpenFile(n, vfs.O_TRUNC|vfs.O_CREATE|vfs.O_WRONLY, 0o600)
if err != nil {
return nil, errors.Wrapf(err, "writing file %q", n)
}
finalize.Close(file)
_, err = io.Copy(file, r)
if err != nil {
return nil, errors.Wrapf(err, "writing %q", n)
}
finalize.Finalize()
}
props := map[string]string{}
props["image"] = op.Image.String()
props["componentVersion"] = op.ComponentVersion
props["action"] = op.Action
data, err := yaml.Marshal(props)
if err != nil {
return nil, errors.Wrapf(err, "writing operation properties")
}
vfs.WriteFile(d.Filesystem, vfs.Join(d.Filesystem, d.TargetPath, "properties"), data, 0o600)
return &install.OperationResult{}, nil
}