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feat(index): add ability to read tree and write tree

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This commit is contained in:
Aleksey Kulikov 2021-08-12 17:14:17 +03:00
parent f5e43f3d90
commit 0194d7c361
5 changed files with 179 additions and 0 deletions
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40
lib/src/index.dart
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@ -1,7 +1,10 @@
import 'dart:ffi';
import 'package:ffi/ffi.dart';
import 'package:libgit2dart/src/tree.dart';
import 'bindings/libgit2_bindings.dart';
import 'bindings/index.dart' as bindings;
import 'bindings/repository.dart' as repo_bindings;
import 'odb.dart';
import 'oid.dart';
import 'types.dart';
import 'util.dart';
@ -88,11 +91,48 @@ class Index {
/// Throws a [LibGit2Error] if error occured.
void read({bool force = true}) => bindings.read(_indexPointer, force);
/// Updates the contents of an existing index object in memory by reading from the
/// specified tree.
void readTree(Object target) {
late final Oid oid;
late final Tree tree;
if (target is Oid) {
tree = Tree(bindings.owner(_indexPointer), target.pointer);
} else if (target is Tree) {
tree = target;
} else if (isValidShaHex(target as String)) {
if (target.length == 40) {
oid = Oid.fromSHA(target);
tree = Tree(bindings.owner(_indexPointer), oid.pointer);
} else {
final shortOid = Oid.fromSHAn(target);
final odb = Odb(repo_bindings.odb(bindings.owner(_indexPointer)));
oid = Oid(odb.existsPrefix(shortOid.pointer, target.length));
odb.free();
tree = Tree(bindings.owner(_indexPointer), oid.pointer);
}
} else {
throw ArgumentError.value(
'$target should be either Oid object, SHA hex string or Tree object');
}
bindings.readTree(_indexPointer, tree.pointer);
tree.free();
}
/// Writes an existing index object from memory back to disk using an atomic file lock.
///
/// Throws a [LibGit2Error] if error occured.
void write() => bindings.write(_indexPointer);
/// Write the index as a tree.
///
/// This method will scan the index and write a representation of its current state back to disk;
/// it recursively creates tree objects for each of the subtrees stored in the index, but only
/// returns the OID of the root tree. This is the OID that can be used e.g. to create a commit.
///
/// The index must not contain any file in conflict.
Oid writeTree() => Oid(bindings.writeTree(_indexPointer));
/// Removes an entry from the index.
///
/// Throws a [LibGit2Error] if error occured.