b01fe1524a
---
type: change
description: |-
Completely refactor naming of everything, in light of new SPEC
Writing the SPEC shed some light on just how weakly a lot of concepts, like
"commit", had been defined, and prompted the delineation of a lot of things
along specific lines (commit vs payload, repo vs project). This commit makes the
code reflect the SPEC much better in quite a few ways:
* Repo is now Project
* Commit is now Payload
* GitCommit is now just Commit
* Hash is now Fingerprint
* A lot of minor fields got renamed
* All the XXXInterface types are now just XXX, and their old XXX type is now
XXXUnion.
More than likely there's still some comments and variable names that have
slipped passed, but overall I feel like I got most of the changes.
fingerprint: AKkDC5BKhKbfXzZQ/F4KquHeMgVvcNxgLmkZFz/nP/tY
credentials:
- type: pgp_signature
pub_key_id: 95C46FA6A41148AC
body: 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
account: mediocregopher
84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
package dehub
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import (
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"crypto/sha256"
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"encoding/binary"
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"fmt"
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"hash"
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"sort"
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)
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var (
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defaultHashHelperAlgo = sha256.New
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)
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type hashHelper struct {
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hash hash.Hash
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varintBuf []byte
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}
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// if h is nil it then defaultHashHelperAlgo will be used
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func newHashHelper(h hash.Hash) *hashHelper {
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if h == nil {
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h = defaultHashHelperAlgo()
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}
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s := &hashHelper{
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hash: h,
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varintBuf: make([]byte, binary.MaxVarintLen64),
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}
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return s
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}
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func (s *hashHelper) sum(prefix []byte) []byte {
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out := make([]byte, len(prefix), len(prefix)+s.hash.Size())
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copy(out, prefix)
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return s.hash.Sum(out)
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}
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func (s *hashHelper) writeUint(i uint64) {
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n := binary.PutUvarint(s.varintBuf, i)
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if _, err := s.hash.Write(s.varintBuf[:n]); err != nil {
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panic(fmt.Sprintf("error writing %x to %T: %v", s.varintBuf[:n], s.hash, err))
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}
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}
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func (s *hashHelper) writeStr(str string) {
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s.writeUint(uint64(len(str)))
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s.hash.Write([]byte(str))
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}
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func (s *hashHelper) writeChangedFiles(changedFiles []ChangedFile) {
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sort.Slice(changedFiles, func(i, j int) bool {
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return changedFiles[i].Path < changedFiles[j].Path
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})
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s.writeUint(uint64(len(changedFiles)))
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for _, fileChanged := range changedFiles {
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s.writeStr(fileChanged.Path)
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s.hash.Write(fileChanged.FromMode.Bytes())
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s.hash.Write(fileChanged.FromHash[:])
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s.hash.Write(fileChanged.ToMode.Bytes())
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s.hash.Write(fileChanged.ToHash[:])
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}
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}
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var (
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changeHashVersion = []byte{0}
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commentHashVersion = []byte{0}
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)
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// if h is nil it then defaultHashHelperAlgo will be used
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func genChangeFingerprint(h hash.Hash, msg string, changedFiles []ChangedFile) []byte {
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s := newHashHelper(h)
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s.writeStr(msg)
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s.writeChangedFiles(changedFiles)
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return s.sum(changeHashVersion)
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}
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// if h is nil it then defaultHashHelperAlgo will be used
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func genCommentFingerprint(h hash.Hash, comment string) []byte {
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s := newHashHelper(h)
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s.writeStr(comment)
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return s.sum(commentHashVersion)
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}
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