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feat(cli): add different git cloning strategies and respective CLI flag
--git-clone-strategy for git based workspaces. Possible values are: - "" (full clone, default behaviour) - blobless (full commit history and trees, no blobs) - treeless (full commit history, no trees nor blobs) - shallow (current HEAD, no history)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| package git | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
|
|
||
| "github.com/spf13/pflag" | ||
| ) | ||
|
|
||
| type CloneStrategy string | ||
|
|
||
| const ( | ||
| FullCloneStrategy CloneStrategy = "" | ||
| BloblessCloneStrategy CloneStrategy = "blobless" | ||
| TreelessCloneStrategy CloneStrategy = "treeless" | ||
| ShallowCloneStrategy CloneStrategy = "shallow" | ||
| ) | ||
|
|
||
| type Cloner interface { | ||
| Clone(ctx context.Context, repository string, targetDir string, extraArgs []string, stdout, stderr io.Writer) error | ||
| } | ||
|
|
||
| func NewCloner(strategy CloneStrategy) Cloner { | ||
| switch strategy { | ||
| case BloblessCloneStrategy: | ||
| return &bloblessClone{} | ||
| case TreelessCloneStrategy: | ||
| return &treelessClone{} | ||
| case ShallowCloneStrategy: | ||
| return &shallowClone{} | ||
| case FullCloneStrategy: | ||
| return &fullClone{} | ||
| default: | ||
| return &fullClone{} | ||
| } | ||
| } | ||
|
|
||
| var _ pflag.Value = (*CloneStrategy)(nil) | ||
|
|
||
| func (s *CloneStrategy) Set(v string) error { | ||
| switch v { | ||
| case string(FullCloneStrategy), | ||
| string(BloblessCloneStrategy), | ||
| string(TreelessCloneStrategy), | ||
| string(ShallowCloneStrategy): | ||
| { | ||
| *s = CloneStrategy(v) | ||
| return nil | ||
| } | ||
| default: | ||
| return fmt.Errorf("CloneStrategy %s not supported", v) | ||
| } | ||
| } | ||
| func (s *CloneStrategy) Type() string { | ||
| return "cloneStrategy" | ||
| } | ||
| func (s *CloneStrategy) String() string { | ||
| return string(*s) | ||
| } | ||
|
|
||
| type fullClone struct{} | ||
|
|
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| var _ Cloner = &fullClone{} | ||
|
|
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| func (c *fullClone) Clone(ctx context.Context, repository string, targetDir string, extraArgs []string, stdout, stderr io.Writer) error { | ||
| args := []string{"clone"} | ||
| args = append(args, extraArgs...) | ||
| args = append(args, repository, targetDir) | ||
| return run(ctx, args, stdout, stderr) | ||
| } | ||
|
|
||
| type bloblessClone struct{} | ||
|
|
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| var _ Cloner = &bloblessClone{} | ||
|
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| func (c *bloblessClone) Clone(ctx context.Context, repository string, targetDir string, extraArgs []string, stdout, stderr io.Writer) error { | ||
| args := []string{"clone", "--filter=blob:none"} | ||
| args = append(args, extraArgs...) | ||
| args = append(args, repository, targetDir) | ||
| return run(ctx, args, stdout, stderr) | ||
| } | ||
|
|
||
| type treelessClone struct{} | ||
|
|
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| var _ Cloner = treelessClone{} | ||
|
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||
| func (c treelessClone) Clone(ctx context.Context, repository string, targetDir string, extraArgs []string, stdout, stderr io.Writer) error { | ||
| args := []string{"clone", "--filter=tree:0"} | ||
| args = append(args, extraArgs...) | ||
| args = append(args, repository, targetDir) | ||
| return run(ctx, args, stdout, stderr) | ||
| } | ||
|
|
||
| type shallowClone struct{} | ||
|
|
||
| var _ Cloner = shallowClone{} | ||
|
|
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| func (c shallowClone) Clone(ctx context.Context, repository string, targetDir string, extraArgs []string, stdout, stderr io.Writer) error { | ||
| args := []string{"clone", "--depth=1"} | ||
| args = append(args, extraArgs...) | ||
| args = append(args, repository, targetDir) | ||
| return run(ctx, args, stdout, stderr) | ||
| } | ||
|
|
||
| func run(ctx context.Context, args []string, stdout, stderr io.Writer) error { | ||
| gitCommand := CommandContext(ctx, args...) | ||
| gitCommand.Stdout = stdout | ||
| gitCommand.Stderr = stderr | ||
| return gitCommand.Run() | ||
| } |
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