mirror of
https://github.com/harness/drone.git
synced 2025-05-04 22:50:23 +00:00
89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
// Copyright 2023 Harness, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package adapter
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import (
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"context"
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"io"
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"github.com/harness/gitness/errors"
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"github.com/harness/gitness/git/types"
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gogitplumbing "github.com/go-git/go-git/v5/plumbing"
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)
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// GetBlob returns the blob for the given object sha.
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func (a Adapter) GetBlob(
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ctx context.Context,
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repoPath string,
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sha string,
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sizeLimit int64,
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) (*types.BlobReader, error) {
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if repoPath == "" {
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return nil, ErrRepositoryPathEmpty
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}
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repo, err := a.repoProvider.Get(ctx, repoPath)
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if err != nil {
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return nil, errors.Internal("failed to open repository", err)
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}
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blob, err := repo.BlobObject(gogitplumbing.NewHash(sha))
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if err != nil {
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if errors.Is(err, gogitplumbing.ErrObjectNotFound) {
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return nil, errors.NotFound("blob sha %s not found", sha)
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}
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return nil, errors.Internal("failed to get blob object for sha '%s'", sha, err)
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}
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objectSize := blob.Size
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contentSize := objectSize
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if sizeLimit > 0 && contentSize > sizeLimit {
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contentSize = sizeLimit
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}
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reader, err := blob.Reader()
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if err != nil {
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return nil, errors.Internal("failed to open blob object for sha '%s'", sha, err)
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}
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return &types.BlobReader{
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SHA: sha,
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Size: objectSize,
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ContentSize: contentSize,
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Content: LimitReadCloser(reader, contentSize),
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}, nil
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}
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func LimitReadCloser(r io.ReadCloser, n int64) io.ReadCloser {
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return limitReadCloser{
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r: io.LimitReader(r, n),
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c: r,
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}
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}
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// limitReadCloser implements io.ReadCloser interface.
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type limitReadCloser struct {
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r io.Reader
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c io.Closer
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}
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func (l limitReadCloser) Read(p []byte) (n int, err error) {
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return l.r.Read(p)
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}
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func (l limitReadCloser) Close() error {
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return l.c.Close()
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}
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