first-commit

modules/git/tree_entry_mode.go

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+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// EntryMode the type of the object in the git tree
+type EntryMode int
+
+// There are only a few file modes in Git. They look like unix file modes, but they can only be
+// one of these.
+const (
+	// EntryModeNoEntry is possible if the file was added or removed in a commit. In the case of
+	// when adding the base commit doesn't have the file in its tree, a mode of 0o000000 is used.
+	EntryModeNoEntry EntryMode = 0o000000
+
+	EntryModeBlob    EntryMode = 0o100644
+	EntryModeExec    EntryMode = 0o100755
+	EntryModeSymlink EntryMode = 0o120000
+	EntryModeCommit  EntryMode = 0o160000
+	EntryModeTree    EntryMode = 0o040000
+)
+
+// String converts an EntryMode to a string
+func (e EntryMode) String() string {
+	return strconv.FormatInt(int64(e), 8)
+}
+
+// IsSubModule if the entry is a submodule
+func (e EntryMode) IsSubModule() bool {
+	return e == EntryModeCommit
+}
+
+// IsDir if the entry is a sub dir
+func (e EntryMode) IsDir() bool {
+	return e == EntryModeTree
+}
+
+// IsLink if the entry is a symlink
+func (e EntryMode) IsLink() bool {
+	return e == EntryModeSymlink
+}
+
+// IsRegular if the entry is a regular file
+func (e EntryMode) IsRegular() bool {
+	return e == EntryModeBlob
+}
+
+// IsExecutable if the entry is an executable file (not necessarily binary)
+func (e EntryMode) IsExecutable() bool {
+	return e == EntryModeExec
+}
+
+func ParseEntryMode(mode string) (EntryMode, error) {
+	switch mode {
+	case "000000":
+		return EntryModeNoEntry, nil
+	case "100644":
+		return EntryModeBlob, nil
+	case "100755":
+		return EntryModeExec, nil
+	case "120000":
+		return EntryModeSymlink, nil
+	case "160000":
+		return EntryModeCommit, nil
+	case "040000", "040755": // git uses 040000 for tree object, but some users may get 040755 for unknown reasons
+		return EntryModeTree, nil
+	default:
+		return 0, fmt.Errorf("unparsable entry mode: %s", mode)
+	}
+}