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// Copyright (c) 2019-2021, Sylabs 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"
"net/url"
"os"
"path"
"strings"
"github.com/sylabs/singularity/v4/internal/pkg/remote"
"github.com/sylabs/singularity/v4/internal/pkg/remote/endpoint"
)
// RemoteAdd adds remote to configuration
func RemoteAdd(configFile, name, uri string, global, insecure, makeDefault bool) (err error) {
// Explicit handling of corner cases: name and uri must be valid strings
if strings.TrimSpace(name) == "" {
return fmt.Errorf("invalid name: cannot have empty name")
}
if strings.TrimSpace(uri) == "" {
return fmt.Errorf("invalid URI: cannot have empty URI")
}
// system config should be world readable
perm := os.FileMode(0o600)
if global {
perm = os.FileMode(0o644)
}
// opening config file
file, err := os.OpenFile(configFile, os.O_RDWR|os.O_CREATE, perm)
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)
}
u, err := url.Parse(uri)
if err != nil {
return err
}
e := endpoint.Config{URI: path.Join(u.Host + u.Path), System: global, Insecure: insecure}
if err := c.Add(name, &e); err != nil {
return err
}
if makeDefault {
if err := c.SetDefault(name, false); 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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