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// Copyright The gittuf Authors
// SPDX-License-Identifier: Apache-2.0
package gitinterface
import (
"errors"
"fmt"
"strconv"
)
type ObjectType uint
const (
BlobObjectType ObjectType = iota + 1
TreeObjectType
CommitObjectType
TagObjectType
)
var ErrInvalidObjectType = errors.New("unknown Git object type")
// HasObject returns true if an object with the specified Git ID exists in the
// repository.
func (r *Repository) HasObject(objectID Hash) bool {
_, err := r.executor("cat-file", "-e", objectID.String()).executeString()
return err == nil
}
func (r *Repository) GetObjectType(objectID Hash) (ObjectType, error) {
objType, err := r.executor("cat-file", "-t", objectID.String()).executeString()
if err != nil {
return 0, fmt.Errorf("unable to inspect object type: %w", err)
}
switch objType {
case "blob":
return BlobObjectType, nil
case "tree":
return TreeObjectType, nil
case "commit":
return CommitObjectType, nil
case "tag":
return TagObjectType, nil
default:
return 0, ErrInvalidObjectType
}
}
// GetObjectSize returns the size of the object with the specified Git ID.
func (r *Repository) GetObjectSize(objectID Hash) (uint64, error) {
stdOut, err := r.executor("cat-file", "-s", objectID.String()).executeString()
if err != nil {
return 0, fmt.Errorf("unable to inspect object size: %w", err)
}
objSize, err := strconv.ParseUint(stdOut, 10, 64)
if err != nil {
return 0, fmt.Errorf("unable to convert output to integer: %w", err)
}
return objSize, nil
}
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