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// Copyright (c) 2021, Sylabs Inc. All rights reserved.
// Copyright (c) 2020, Control Command Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package singularity
import (
"fmt"
"io"
"os"
"strings"
"github.com/sylabs/singularity/v4/internal/pkg/remote"
"github.com/sylabs/singularity/v4/internal/pkg/remote/endpoint"
)
func KeyserverAdd(name, uri string, order uint32, insecure bool) error {
// Explicit handling of corner cases: name and uri must be valid strings
if strings.TrimSpace(uri) == "" {
return fmt.Errorf("invalid URI: cannot have empty URI")
}
// opening config file
file, err := os.OpenFile(remote.SystemConfigPath, os.O_RDWR|os.O_CREATE, 0o644)
if err != nil {
return fmt.Errorf("while opening remote config file: %s", err)
}
defer file.Close()
// read file contents to config struct
c, err := remote.ReadFrom(file)
if err != nil {
return fmt.Errorf("while parsing remote config data: %s", err)
}
var ep *endpoint.Config
if name == "" {
ep, err = c.GetDefault()
} else {
ep, err = c.GetRemote(name)
}
if err != nil {
return fmt.Errorf("no endpoint found: %s", err)
} else if !ep.System {
return fmt.Errorf("current endpoint is not a system defined endpoint")
}
if err := ep.AddKeyserver(uri, order, insecure); err != nil {
return err
}
// truncating file before writing new contents and syncing to commit file
if err := file.Truncate(0); err != nil {
return fmt.Errorf("while truncating remote config file: %s", err)
}
if n, err := file.Seek(0, io.SeekStart); err != nil || n != 0 {
return fmt.Errorf("failed to reset %s cursor: %s", file.Name(), err)
}
if _, err := c.WriteTo(file); err != nil {
return fmt.Errorf("while writing remote config to file: %s", err)
}
if err := file.Sync(); err != nil {
return fmt.Errorf("failed to flush remote config file %s: %s", file.Name(), err)
}
return nil
}
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