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package otbuiltin
import (
"errors"
"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"
// checkoutOptions defines all of the options for checking commits
// out of an ostree repo
//
// Note: while this is private, fields are public and part of the API.
type checkoutOptions struct {
// UserMode defines whether to checkout a repo in `bare-user` mode
UserMode bool
// Union specifies whether to overwrite existing filesystem entries
Union bool
// AllowNoEnt defines whether to skip filepaths that do not exist
AllowNoent bool
// DisableCache defines whether to disable internal repository uncompressed object cache
DisableCache bool
// Whiteouts defines whether to Process 'whiteout' (docker style) entries
Whiteouts bool
// RequireHardlinks defines whether to fall back to full copies if hard linking fails
RequireHardlinks bool
// SubPath specifies a sub-directory to use for checkout
Subpath string
// FromFile specifies an optional file containing many checkouts to process
FromFile string
}
// NewCheckoutOptions instantiates and returns a checkoutOptions struct with default values set
func NewCheckoutOptions() checkoutOptions {
return checkoutOptions{}
}
// Checkout checks out commit `commitRef` from a repository at `repoPath`,
// writing it to `destination`. Returns an error if the checkout could not be processed.
func Checkout(repoPath, destination, commitRef string, opts checkoutOptions) error {
var cancellable *glib.GCancellable
ccommit := C.CString(commitRef)
defer C.free(unsafe.Pointer(ccommit))
var gerr = glib.NewGError()
cerr := (*C.GError)(gerr.Ptr())
defer C.free(unsafe.Pointer(cerr))
repoPathc := C.g_file_new_for_path(C.CString(repoPath))
defer C.g_object_unref(C.gpointer(repoPathc))
crepo := C.ostree_repo_new(repoPathc)
if !glib.GoBool(glib.GBoolean(C.ostree_repo_open(crepo, (*C.GCancellable)(cancellable.Ptr()), &cerr))) {
return generateError(cerr)
}
// Multiple checkouts to process
if opts.FromFile != "" {
return processManyCheckouts(crepo, destination, cancellable)
}
// Simple single checkout
var resolvedCommit *C.char
defer C.free(unsafe.Pointer(resolvedCommit))
if !glib.GoBool(glib.GBoolean(C.ostree_repo_resolve_rev(crepo, ccommit, C.FALSE, &resolvedCommit, &cerr))) {
return generateError(cerr)
}
return processOneCheckout(crepo, resolvedCommit, destination, opts, cancellable)
}
// processOneCheckout processes one checkout from the repo
func processOneCheckout(crepo *C.OstreeRepo, resolvedCommit *C.char, destination string, opts checkoutOptions, cancellable *glib.GCancellable) error {
cdest := C.CString(destination)
defer C.free(unsafe.Pointer(cdest))
var gerr = glib.NewGError()
cerr := (*C.GError)(gerr.Ptr())
defer C.free(unsafe.Pointer(cerr))
// Process options into bitflags
var repoCheckoutAtOptions C.OstreeRepoCheckoutAtOptions
if opts.UserMode {
repoCheckoutAtOptions.mode = C.OSTREE_REPO_CHECKOUT_MODE_USER
}
if opts.Union {
repoCheckoutAtOptions.overwrite_mode = C.OSTREE_REPO_CHECKOUT_OVERWRITE_UNION_FILES
}
if opts.RequireHardlinks {
repoCheckoutAtOptions.no_copy_fallback = C.TRUE
}
// Checkout commit to destination
if !glib.GoBool(glib.GBoolean(C.ostree_repo_checkout_at(crepo, &repoCheckoutAtOptions, C._at_fdcwd(), cdest, resolvedCommit, nil, &cerr))) {
return generateError(cerr)
}
return nil
}
// processManyCheckouts processes many checkouts in a single batch
func processManyCheckouts(crepo *C.OstreeRepo, target string, cancellable *glib.GCancellable) error {
return errors.New("batch checkouts processing: not implemented")
}
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