github.com/google/syzkaller@v0.0.0-20251211124644-a066d2bc4b02/pkg/email/lore/read.go (about)

     1  // Copyright 2023 syzkaller project authors. All rights reserved.
     2  // Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
     3  
     4  package lore
     5  
     6  import (
     7  	"bytes"
     8  	"fmt"
     9  	"time"
    10  
    11  	"github.com/google/syzkaller/pkg/email"
    12  	"github.com/google/syzkaller/pkg/vcs"
    13  )
    14  
    15  type EmailReader struct {
    16  	vcs.CommitShort
    17  	Read func() ([]byte, error)
    18  }
    19  
    20  // ReadArchive queries the parsed messages from a single LKML message archive.
    21  func ReadArchive(repo vcs.Repo, afterCommit string, afterTime time.Time) ([]EmailReader, error) {
    22  	commits, err := repo.LatestCommits(afterCommit, afterTime)
    23  	if err != nil {
    24  		return nil, fmt.Errorf("failed to get recent commits: %w", err)
    25  	}
    26  	var ret []EmailReader
    27  	for _, iterCommit := range commits {
    28  		commit := iterCommit
    29  		ret = append(ret, EmailReader{
    30  			CommitShort: commit,
    31  			Read: func() ([]byte, error) {
    32  				return repo.Object("m", commit.Hash)
    33  			},
    34  		})
    35  	}
    36  	return ret, nil
    37  }
    38  
    39  type Email struct {
    40  	*email.Email
    41  	HasPatch bool
    42  }
    43  
    44  func (er *EmailReader) Parse(emails, domains []string) (*Email, error) {
    45  	body, err := er.Read()
    46  	if err != nil {
    47  		return nil, err
    48  	}
    49  	return emailFromRaw(body, emails, domains)
    50  }
    51  
    52  func emailFromRaw(body []byte, emails, domains []string) (*Email, error) {
    53  	msg, err := email.Parse(bytes.NewReader(body), emails, nil, domains)
    54  	if err != nil {
    55  		return nil, err
    56  	}
    57  	ret := &Email{Email: msg, HasPatch: msg.Patch != ""}
    58  	// Keep memory consumption low.
    59  	ret.Body = ""
    60  	ret.Patch = ""
    61  	// TODO: If emails/domains are nil, we also don't need to parse the body at all.
    62  	return ret, nil
    63  }