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https://github.com/go-gitea/gitea
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This PR follows #21535 (and replace #22592) ## Review without space diff https://github.com/go-gitea/gitea/pull/22678/files?diff=split&w=1 ## Purpose of this PR 1. Make git module command completely safe (risky user inputs won't be passed as argument option anymore) 2. Avoid low-level mistakes like https://github.com/go-gitea/gitea/pull/22098#discussion_r1045234918 3. Remove deprecated and dirty `CmdArgCheck` function, hide the `CmdArg` type 4. Simplify code when using git command ## The main idea of this PR * Move the `git.CmdArg` to the `internal` package, then no other package except `git` could use it. Then developers could never do `AddArguments(git.CmdArg(userInput))` any more. * Introduce `git.ToTrustedCmdArgs`, it's for user-provided and already trusted arguments. It's only used in a few cases, for example: use git arguments from config file, help unit test with some arguments. * Introduce `AddOptionValues` and `AddOptionFormat`, they make code more clear and simple: * Before: `AddArguments("-m").AddDynamicArguments(message)` * After: `AddOptionValues("-m", message)` * - * Before: `AddArguments(git.CmdArg(fmt.Sprintf("--author='%s <%s>'", sig.Name, sig.Email)))` * After: `AddOptionFormat("--author='%s <%s>'", sig.Name, sig.Email)` ## FAQ ### Why these changes were not done in #21535 ? #21535 is mainly a search&replace, it did its best to not change too much logic. Making the framework better needs a lot of changes, so this separate PR is needed as the second step. ### The naming of `AddOptionXxx` According to git's manual, the `--xxx` part is called `option`. ### How can it guarantee that `internal.CmdArg` won't be not misused? Go's specification guarantees that. Trying to access other package's internal package causes compilation error. And, `golangci-lint` also denies the git/internal package. Only the `git/command.go` can use it carefully. ### There is still a `ToTrustedCmdArgs`, will it still allow developers to make mistakes and pass untrusted arguments? Generally speaking, no. Because when using `ToTrustedCmdArgs`, the code will be very complex (see the changes for examples). Then developers and reviewers can know that something might be unreasonable. ### Why there was a `CmdArgCheck` and why it's removed? At the moment of #21535, to reduce unnecessary changes, `CmdArgCheck` was introduced as a hacky patch. Now, almost all code could be written as `cmd := NewCommand(); cmd.AddXxx(...)`, then there is no need for `CmdArgCheck` anymore. ### Why many codes for `signArg == ""` is deleted? Because in the old code, `signArg` could never be empty string, it's either `-S[key-id]` or `--no-gpg-sign`. So the `signArg == ""` is just dead code. --------- Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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//go:build !gogit
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package git
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import (
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"io"
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"math"
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"strings"
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)
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// Tree represents a flat directory listing.
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type Tree struct {
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ID SHA1
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ResolvedID SHA1
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repo *Repository
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// parent tree
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ptree *Tree
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entries Entries
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entriesParsed bool
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entriesRecursive Entries
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entriesRecursiveParsed bool
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}
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// ListEntries returns all entries of current tree.
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func (t *Tree) ListEntries() (Entries, error) {
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if t.entriesParsed {
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return t.entries, nil
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}
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if t.repo != nil {
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wr, rd, cancel := t.repo.CatFileBatch(t.repo.Ctx)
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defer cancel()
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_, _ = wr.Write([]byte(t.ID.String() + "\n"))
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_, typ, sz, err := ReadBatchLine(rd)
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if err != nil {
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return nil, err
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}
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if typ == "commit" {
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treeID, err := ReadTreeID(rd, sz)
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if err != nil && err != io.EOF {
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return nil, err
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}
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_, _ = wr.Write([]byte(treeID + "\n"))
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_, typ, sz, err = ReadBatchLine(rd)
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if err != nil {
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return nil, err
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}
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}
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if typ == "tree" {
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t.entries, err = catBatchParseTreeEntries(t, rd, sz)
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if err != nil {
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return nil, err
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}
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t.entriesParsed = true
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return t.entries, nil
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}
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// Not a tree just use ls-tree instead
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for sz > math.MaxInt32 {
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discarded, err := rd.Discard(math.MaxInt32)
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sz -= int64(discarded)
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if err != nil {
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return nil, err
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}
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}
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for sz > 0 {
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discarded, err := rd.Discard(int(sz))
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sz -= int64(discarded)
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if err != nil {
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return nil, err
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}
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}
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}
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stdout, _, runErr := NewCommand(t.repo.Ctx, "ls-tree", "-l").AddDynamicArguments(t.ID.String()).RunStdBytes(&RunOpts{Dir: t.repo.Path})
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if runErr != nil {
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if strings.Contains(runErr.Error(), "fatal: Not a valid object name") || strings.Contains(runErr.Error(), "fatal: not a tree object") {
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return nil, ErrNotExist{
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ID: t.ID.String(),
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}
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}
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return nil, runErr
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}
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var err error
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t.entries, err = parseTreeEntries(stdout, t)
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if err == nil {
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t.entriesParsed = true
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}
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return t.entries, err
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}
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// listEntriesRecursive returns all entries of current tree recursively including all subtrees
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// extraArgs could be "-l" to get the size, which is slower
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func (t *Tree) listEntriesRecursive(extraArgs TrustedCmdArgs) (Entries, error) {
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if t.entriesRecursiveParsed {
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return t.entriesRecursive, nil
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}
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stdout, _, runErr := NewCommand(t.repo.Ctx, "ls-tree", "-t", "-r").
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AddArguments(extraArgs...).
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AddDynamicArguments(t.ID.String()).
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RunStdBytes(&RunOpts{Dir: t.repo.Path})
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if runErr != nil {
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return nil, runErr
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}
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var err error
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t.entriesRecursive, err = parseTreeEntries(stdout, t)
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if err == nil {
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t.entriesRecursiveParsed = true
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}
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return t.entriesRecursive, err
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}
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// ListEntriesRecursiveFast returns all entries of current tree recursively including all subtrees, no size
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func (t *Tree) ListEntriesRecursiveFast() (Entries, error) {
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return t.listEntriesRecursive(nil)
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}
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// ListEntriesRecursiveWithSize returns all entries of current tree recursively including all subtrees, with size
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func (t *Tree) ListEntriesRecursiveWithSize() (Entries, error) {
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return t.listEntriesRecursive(TrustedCmdArgs{"--long"})
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}
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