mirror of https://github.com/harness/drone.git
133 lines
3.1 KiB
Go
133 lines
3.1 KiB
Go
// Copyright 2023 Harness, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package api
|
|
|
|
import (
|
|
"context"
|
|
"crypto/sha256"
|
|
"encoding/gob"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/harness/gitness/cache"
|
|
"github.com/harness/gitness/errors"
|
|
"github.com/harness/gitness/git/sha"
|
|
|
|
"github.com/go-redis/redis/v8"
|
|
"github.com/rs/zerolog/log"
|
|
)
|
|
|
|
func NewInMemoryLastCommitCache(
|
|
cacheDuration time.Duration,
|
|
) cache.Cache[CommitEntryKey, *Commit] {
|
|
return cache.New[CommitEntryKey, *Commit](
|
|
commitEntryGetter{},
|
|
cacheDuration)
|
|
}
|
|
|
|
func logCacheErrFn(ctx context.Context, err error) {
|
|
log.Ctx(ctx).Warn().Msgf("failed to use cache: %s", err.Error())
|
|
}
|
|
|
|
func NewRedisLastCommitCache(
|
|
redisClient redis.UniversalClient,
|
|
cacheDuration time.Duration,
|
|
) (cache.Cache[CommitEntryKey, *Commit], error) {
|
|
if redisClient == nil {
|
|
return nil, errors.New("unable to create redis based LastCommitCache as redis client is nil")
|
|
}
|
|
|
|
return cache.NewRedis[CommitEntryKey, *Commit](
|
|
redisClient,
|
|
commitEntryGetter{},
|
|
func(key CommitEntryKey) string {
|
|
h := sha256.New()
|
|
h.Write([]byte(key))
|
|
return "last_commit:" + hex.EncodeToString(h.Sum(nil))
|
|
},
|
|
commitValueCodec{},
|
|
cacheDuration,
|
|
logCacheErrFn,
|
|
), nil
|
|
}
|
|
|
|
func NoLastCommitCache() cache.Cache[CommitEntryKey, *Commit] {
|
|
return cache.NewNoCache[CommitEntryKey, *Commit](commitEntryGetter{})
|
|
}
|
|
|
|
type CommitEntryKey string
|
|
|
|
const separatorZero = "\x00"
|
|
|
|
func makeCommitEntryKey(
|
|
repoPath string,
|
|
commitSHA sha.SHA,
|
|
path string,
|
|
) CommitEntryKey {
|
|
return CommitEntryKey(repoPath + separatorZero + commitSHA.String() + separatorZero + path)
|
|
}
|
|
|
|
func (c CommitEntryKey) Split() (
|
|
repoPath string,
|
|
commitSHA string,
|
|
path string,
|
|
) {
|
|
parts := strings.Split(string(c), separatorZero)
|
|
if len(parts) != 3 {
|
|
return
|
|
}
|
|
|
|
repoPath = parts[0]
|
|
commitSHA = parts[1]
|
|
path = parts[2]
|
|
|
|
return
|
|
}
|
|
|
|
type commitValueCodec struct{}
|
|
|
|
func (c commitValueCodec) Encode(v *Commit) string {
|
|
buffer := &strings.Builder{}
|
|
_ = gob.NewEncoder(buffer).Encode(v)
|
|
return buffer.String()
|
|
}
|
|
|
|
func (c commitValueCodec) Decode(s string) (*Commit, error) {
|
|
commit := &Commit{}
|
|
if err := gob.NewDecoder(strings.NewReader(s)).Decode(commit); err != nil {
|
|
return nil, fmt.Errorf("failed to unpack commit entry value: %w", err)
|
|
}
|
|
|
|
return commit, nil
|
|
}
|
|
|
|
type commitEntryGetter struct{}
|
|
|
|
// Find implements the cache.Getter interface.
|
|
func (c commitEntryGetter) Find(
|
|
ctx context.Context,
|
|
key CommitEntryKey,
|
|
) (*Commit, error) {
|
|
repoPath, commitSHA, path := key.Split()
|
|
|
|
if path == "" {
|
|
path = "."
|
|
}
|
|
|
|
return getCommit(ctx, repoPath, commitSHA, path)
|
|
}
|