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// Package otbuiltin contains all of the basic commands for creating and
// interacting with an ostree repository
package otbuiltin
import (
"errors"
"fmt"
"runtime"
"unsafe"
glib "github.com/ostreedev/ostree-go/pkg/glibobject"
)
// #cgo pkg-config: ostree-1
// #include <stdlib.h>
// #include <glib.h>
// #include <ostree.h>
// #include "builtin.go.h"
import "C"
// Repo represents a local ostree repository
type Repo struct {
ptr unsafe.Pointer
}
// isInitialized checks if the repo has been initialized
func (r *Repo) isInitialized() bool {
if r == nil || r.ptr == nil {
return false
}
return true
}
// native converts an ostree repo struct to its C equivalent
func (r *Repo) native() *C.OstreeRepo {
if !r.isInitialized() {
return nil
}
return (*C.OstreeRepo)(r.ptr)
}
// repoFromNative takes a C ostree repo and converts it to a Go struct
func repoFromNative(or *C.OstreeRepo) *Repo {
if or == nil {
return nil
}
r := &Repo{unsafe.Pointer(or)}
return r
}
// OpenRepo attempts to open the repo at the given path
func OpenRepo(path string) (*Repo, error) {
if path == "" {
return nil, errors.New("empty path")
}
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
repoPath := C.g_file_new_for_path(cpath)
defer C.g_object_unref(C.gpointer(repoPath))
crepo := C.ostree_repo_new(repoPath)
repo := repoFromNative(crepo)
var cerr *C.GError
r := glib.GoBool(glib.GBoolean(C.ostree_repo_open(crepo, nil, &cerr)))
if !r {
return nil, generateError(cerr)
}
return repo, nil
}
// enableTombstoneCommits enables support for tombstone commits.
//
// This allows to distinguish between intentional deletions and accidental removals
// of commits.
func (r *Repo) enableTombstoneCommits() error {
if !r.isInitialized() {
return errors.New("repo not initialized")
}
config := C.ostree_repo_get_config(r.native())
groupC := C.CString("core")
defer C.free(unsafe.Pointer(groupC))
keyC := C.CString("tombstone-commits")
defer C.free(unsafe.Pointer(keyC))
valueC := C.g_key_file_get_boolean(config, (*C.gchar)(groupC), (*C.gchar)(keyC), nil)
tombstoneCommits := glib.GoBool(glib.GBoolean(valueC))
// tombstoneCommits is false only if it really is false or if it is set to FALSE in the config file
if !tombstoneCommits {
var cerr *C.GError
C.g_key_file_set_boolean(config, (*C.gchar)(groupC), (*C.gchar)(keyC), C.TRUE)
if !glib.GoBool(glib.GBoolean(C.ostree_repo_write_config(r.native(), config, &cerr))) {
return generateError(cerr)
}
}
return nil
}
// generateError wraps a GLib error into a Go one.
func generateError(err *C.GError) error {
if err == nil {
return errors.New("nil GError")
}
goErr := glib.ConvertGError(glib.ToGError(unsafe.Pointer(err)))
_, file, line, ok := runtime.Caller(1)
if ok {
return fmt.Errorf("%s:%d - %s", file, line, goErr)
}
return goErr
}
// isOk wraps a gboolean return value into a bool.
// 0 is false/error, everything else is true/ok.
func isOk(v C.gboolean) bool {
return glib.GoBool(glib.GBoolean(v))
}
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