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// Copyright 2024 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package covermerger
import (
"errors"
"fmt"
"io"
"net/http"
"net/url"
)
type webGit struct {
}
func (mr *webGit) GetFileVersions(c *Config, targetFilePath string, rbcs []RepoBranchCommit,
) (fileVersions, error) {
res := make(fileVersions)
for _, rbc := range rbcs {
fileBytes, err := loadFile(targetFilePath, rbc.Repo, rbc.Commit)
// It is ok if some file doesn't exist. It means we have repo FS diff.
if err == errFileNotFound {
continue
}
if err != nil {
return nil, fmt.Errorf("failed to loadFile: %w", err)
}
res[rbc] = string(fileBytes)
}
return res, nil
}
var errFileNotFound = errors.New("file not found")
func loadFile(filePath, repo, commit string) ([]byte, error) {
uri := fmt.Sprintf("%s/plain/%s?id=%s", repo, filePath, commit)
u, err := url.Parse(uri)
if err != nil {
return nil, fmt.Errorf("failed to parse %v: %w", uri, err)
}
u.Scheme = "https"
uri = u.String()
res, err := http.Get(uri)
if err != nil {
return nil, fmt.Errorf("failed to http.Get: %w", err)
}
defer res.Body.Close()
if res.StatusCode == 404 {
return nil, errFileNotFound
}
if res.StatusCode != 200 {
return nil, fmt.Errorf("error: status %d getting %s", res.StatusCode, uri)
}
body, err := io.ReadAll(res.Body)
if err != nil {
return nil, fmt.Errorf("failed to io.ReadAll from body: %w", err)
}
return body, nil
}
func MakeWebGit() FileVersProvider {
return &webGit{}
}
func GetFileVersion(filePath, repo, commit string) (string, error) {
rbc := RepoBranchCommit{repo, "", commit}
files, err := MakeWebGit().GetFileVersions(nil,
filePath,
[]RepoBranchCommit{rbc})
if err != nil {
return "", fmt.Errorf("failed to GetFileVersions: %w", err)
}
return files[rbc], nil
}
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