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Monorepo for Tangled
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5.0 kB · 206 lines
Go
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import ( "bytes" "encoding/json" "fmt" "maps" "regexp" "strings"
"github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/object")
type Commit struct { // hash of the commit object. Hash plumbing.Hash `json:"hash,omitempty"`
// author is the original author of the commit. Author object.Signature `json:"author"`
// committer is the one performing the commit, might be different from author. Committer object.Signature `json:"committer"`
// message is the commit message, contains arbitrary text. Message string `json:"message"`
// treehash is the hash of the root tree of the commit. Tree string `json:"tree"`
// parents are the hashes of the parent commits of the commit. ParentHashes []plumbing.Hash `json:"parent_hashes,omitempty"`
// pgpsignature is the pgp signature of the commit. PGPSignature string `json:"pgp_signature,omitempty"`
// mergetag is the embedded tag object when a merge commit is created by // merging a signed tag. MergeTag string `json:"merge_tag,omitempty"`
// changeid is a unique identifier for the change (e.g., gerrit change-id). ChangeId string `json:"change_id,omitempty"`
// extraheaders contains additional headers not captured by other fields. ExtraHeaders map[string][]byte `json:"extra_headers,omitempty"`
// deprecated: kept for backwards compatibility with old json format. This string `json:"this,omitempty"`
// deprecated: kept for backwards compatibility with old json format. Parent string `json:"parent,omitempty"`}
// types.Commit is an unify two commit structs:// - git.object.Commit from// - types.NiceDiff.commit//// to do this in backwards compatible fashion, we define the base struct// to use the same fields as NiceDiff.Commit, and then we also unmarshal// the struct fields from go-git structs, this custom unmarshal makes sense// of both representations and unifies them to have maximal data in either// form.func (c *Commit) UnmarshalJSON(data []byte) error { type Alias Commit
aux := &struct { *object.Commit *Alias }{ Alias: (*Alias)(c), }
if err := json.Unmarshal(data, aux); err != nil { return err }
c.FromGoGitCommit(aux.Commit)
return nil}
// fill in as much of Commit as possible from the given go-git commitfunc (c *Commit) FromGoGitCommit(gc *object.Commit) { if gc == nil { return }
if c.Hash.IsZero() { c.Hash = gc.Hash } if c.This == "" { c.This = gc.Hash.String() } if isEmptySignature(c.Author) { c.Author = gc.Author } if isEmptySignature(c.Committer) { c.Committer = gc.Committer } if c.Message == "" { c.Message = gc.Message } if c.Tree == "" { c.Tree = gc.TreeHash.String() } if c.PGPSignature == "" { c.PGPSignature = gc.PGPSignature } if c.MergeTag == "" { c.MergeTag = gc.MergeTag }
if len(c.ParentHashes) == 0 { c.ParentHashes = gc.ParentHashes } if c.Parent == "" && len(gc.ParentHashes) > 0 { c.Parent = gc.ParentHashes[0].String() }
if len(c.ExtraHeaders) == 0 { c.ExtraHeaders = make(map[string][]byte) maps.Copy(c.ExtraHeaders, gc.ExtraHeaders) }
if c.ChangeId == "" { if v, ok := gc.ExtraHeaders["change-id"]; ok { c.ChangeId = string(v) } }}
func isEmptySignature(s object.Signature) bool { return s.Email == "" && s.Name == "" && s.When.IsZero()}
// produce a verifiable payload from this commit's metadatafunc (c *Commit) Payload() string { author := bytes.NewBuffer([]byte{}) c.Author.Encode(author)
committer := bytes.NewBuffer([]byte{}) c.Committer.Encode(committer)
payload := strings.Builder{}
fmt.Fprintf(&payload, "tree %s\n", c.Tree)
if len(c.ParentHashes) > 0 { for _, p := range c.ParentHashes { fmt.Fprintf(&payload, "parent %s\n", p.String()) } } else if c.Parent != "" { // present for backwards compatibility fmt.Fprintf(&payload, "parent %s\n", c.Parent) }
fmt.Fprintf(&payload, "author %s\n", author.String()) fmt.Fprintf(&payload, "committer %s\n", committer.String())
if c.ChangeId != "" { fmt.Fprintf(&payload, "change-id %s\n", c.ChangeId) } else if v, ok := c.ExtraHeaders["change-id"]; ok { fmt.Fprintf(&payload, "change-id %s\n", string(v)) }
fmt.Fprintf(&payload, "\n%s", c.Message)
return payload.String()}
var ( coAuthorRegex = regexp.MustCompile(`(?im)^Co-authored-by:\s*(.+?)\s*<([^>]+)>`))
func (commit Commit) CoAuthors() []object.Signature { var coAuthors []object.Signature seen := make(map[string]bool) matches := coAuthorRegex.FindAllStringSubmatch(commit.Message, -1)
for _, match := range matches { if len(match) >= 3 { name := strings.TrimSpace(match[1]) email := strings.TrimSpace(match[2])
if seen[email] { continue } seen[email] = true
coAuthors = append(coAuthors, object.Signature{ Name: name, Email: email, When: commit.Committer.When, }) } }
return coAuthors}
func (commit Commit) FirstParentHash() plumbing.Hash { if len(commit.ParentHashes) > 0 { return commit.ParentHashes[0] } return plumbing.ZeroHash}