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	Close #22614. Refer to [Github's API](https://docs.github.com/en/rest/git/trees?apiVersion=2022-11-28#get-a-tree), if a tree entry is a submodule, its url will be an empty string. --------- Co-authored-by: delvh <leon@kske.dev> Co-authored-by: John Olheiser <john.olheiser@gmail.com>
		
			
				
	
	
		
			100 lines
		
	
	
		
			2.8 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			100 lines
		
	
	
		
			2.8 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package files
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import (
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	"context"
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	"fmt"
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	"net/url"
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	"code.gitea.io/gitea/models"
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	repo_model "code.gitea.io/gitea/models/repo"
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	"code.gitea.io/gitea/modules/git"
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	"code.gitea.io/gitea/modules/setting"
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	api "code.gitea.io/gitea/modules/structs"
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)
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// GetTreeBySHA get the GitTreeResponse of a repository using a sha hash.
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func GetTreeBySHA(ctx context.Context, repo *repo_model.Repository, gitRepo *git.Repository, sha string, page, perPage int, recursive bool) (*api.GitTreeResponse, error) {
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	gitTree, err := gitRepo.GetTree(sha)
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	if err != nil || gitTree == nil {
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		return nil, models.ErrSHANotFound{
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			SHA: sha,
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		}
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	}
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	tree := new(api.GitTreeResponse)
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	tree.SHA = gitTree.ResolvedID.String()
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	tree.URL = repo.APIURL() + "/git/trees/" + url.PathEscape(tree.SHA)
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	var entries git.Entries
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	if recursive {
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		entries, err = gitTree.ListEntriesRecursiveWithSize()
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	} else {
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		entries, err = gitTree.ListEntries()
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	}
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	if err != nil {
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		return nil, err
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	}
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	apiURL := repo.APIURL()
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	apiURLLen := len(apiURL)
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	// 51 is len(sha1) + len("/git/blobs/"). 40 + 11.
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	blobURL := make([]byte, apiURLLen+51)
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	copy(blobURL, apiURL)
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	copy(blobURL[apiURLLen:], "/git/blobs/")
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	// 51 is len(sha1) + len("/git/trees/"). 40 + 11.
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	treeURL := make([]byte, apiURLLen+51)
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	copy(treeURL, apiURL)
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	copy(treeURL[apiURLLen:], "/git/trees/")
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	// 40 is the size of the sha1 hash in hexadecimal format.
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	copyPos := len(treeURL) - git.SHAFullLength
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	if perPage <= 0 || perPage > setting.API.DefaultGitTreesPerPage {
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		perPage = setting.API.DefaultGitTreesPerPage
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	}
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	if page <= 0 {
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		page = 1
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	}
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	tree.Page = page
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	tree.TotalCount = len(entries)
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	rangeStart := perPage * (page - 1)
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	if rangeStart >= len(entries) {
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		return tree, nil
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	}
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	var rangeEnd int
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	if len(entries) > perPage {
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		tree.Truncated = true
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	}
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	if rangeStart+perPage < len(entries) {
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		rangeEnd = rangeStart + perPage
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	} else {
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		rangeEnd = len(entries)
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	}
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	tree.Entries = make([]api.GitEntry, rangeEnd-rangeStart)
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	for e := rangeStart; e < rangeEnd; e++ {
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		i := e - rangeStart
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		tree.Entries[i].Path = entries[e].Name()
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		tree.Entries[i].Mode = fmt.Sprintf("%06o", entries[e].Mode())
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		tree.Entries[i].Type = entries[e].Type()
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		tree.Entries[i].Size = entries[e].Size()
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		tree.Entries[i].SHA = entries[e].ID.String()
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		if entries[e].IsDir() {
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			copy(treeURL[copyPos:], entries[e].ID.String())
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			tree.Entries[i].URL = string(treeURL)
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		} else if entries[e].IsSubModule() {
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			// In Github Rest API Version=2022-11-28, if a tree entry is a submodule,
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			// its url will be returned as an empty string.
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			// So the URL will be set to "" here.
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			tree.Entries[i].URL = ""
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		} else {
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			copy(blobURL[copyPos:], entries[e].ID.String())
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			tree.Entries[i].URL = string(blobURL)
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		}
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	}
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	return tree, nil
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}
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