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	Fixes #22236
---
Error occurring currently while trying to revert commit using read-tree
-m approach:
> 2022/12/26 16:04:43 ...rvices/pull/patch.go:240:AttemptThreeWayMerge()
[E] [63a9c61a] Unable to run read-tree -m! Error: exit status 128 -
fatal: this operation must be run in a work tree
> 	 - fatal: this operation must be run in a work tree
We need to clone a non-bare repository for `git read-tree -m` to work.
bb371aee6e
adds support to create a non-bare cloned temporary upload repository.
After cloning a non-bare temporary upload repository, we [set default
index](https://github.com/go-gitea/gitea/blob/main/services/repository/files/cherry_pick.go#L37)
(`git read-tree HEAD`).
This operation ends up resetting the git index file (see investigation
details below), due to which, we need to call `git update-index
--refresh` afterward.
Here's the diff of the index file before and after we execute
SetDefaultIndex: https://www.diffchecker.com/hyOP3eJy/
Notice the **ctime**, **mtime** are set to 0 after SetDefaultIndex.
You can reproduce the same behavior using these steps:
```bash
$ git clone https://try.gitea.io/me-heer/test.git -s -b main
$ cd test
$ git read-tree HEAD
$ git read-tree -m 1f085d7ed8 1f085d7ed8 9933caed00
error: Entry '1' not uptodate. Cannot merge.
```
After which, we can fix like this:
```
$ git update-index --refresh
$ git read-tree -m 1f085d7ed8 1f085d7ed8 9933caed00
```
		
	
			
		
			
				
	
	
		
			35 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			35 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
| package integration
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| 
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| import (
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| 	"net/http"
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| 	"testing"
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| 
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| 	"code.gitea.io/gitea/tests"
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| 
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| 	"github.com/stretchr/testify/assert"
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| )
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| 
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| func TestRepoMergeCommitRevert(t *testing.T) {
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| 	defer tests.PrepareTestEnv(t)()
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| 	session := loginUser(t, "user2")
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| 
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| 	req := NewRequest(t, "GET", "/user2/test_commit_revert/_cherrypick/deebcbc752e540bab4ce3ee713d3fc8fdc35b2f7/main?ref=main&refType=branch&cherry-pick-type=revert")
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| 	resp := session.MakeRequest(t, req, http.StatusOK)
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| 
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| 	htmlDoc := NewHTMLParser(t, resp.Body)
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| 	req = NewRequestWithValues(t, "POST", "/user2/test_commit_revert/_cherrypick/deebcbc752e540bab4ce3ee713d3fc8fdc35b2f7/main", map[string]string{
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| 		"_csrf":           htmlDoc.GetCSRF(),
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| 		"last_commit":     "deebcbc752e540bab4ce3ee713d3fc8fdc35b2f7",
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| 		"page_has_posted": "true",
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| 		"revert":          "true",
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| 		"commit_summary":  "reverting test commit",
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| 		"commit_message":  "test message",
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| 		"commit_choice":   "direct",
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| 		"new_branch_name": "test-revert-branch-1",
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| 	})
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| 	resp = session.MakeRequest(t, req, http.StatusSeeOther)
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| 
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| 	// A successful revert redirects to the main branch
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| 	assert.EqualValues(t, "/user2/test_commit_revert/src/branch/main", resp.Header().Get("Location"))
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| }
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