timecraft: add trace command

Signed-off-by: Achille Roussel <[email protected]>

describe.go

@@ -13,7 +13,6 @@ import (
  "time"
 
  pprof "github.com/google/pprof/profile"
- "github.com/google/uuid"
  "github.com/stealthrocket/timecraft/format"
  "github.com/stealthrocket/timecraft/internal/print/human"
  "github.com/stealthrocket/timecraft/internal/print/jsonprint"
@@ -362,9 +361,9 @@ func descriptorAndData(desc *format.Descriptor, data any) any {
 }
 
 func lookupProcessByLogID(ctx context.Context, reg *timemachine.Registry, id string) (format.UUID, *format.Descriptor, *format.Process, error) {
- processID, err := uuid.Parse(id)
+ processID, err := parseProcessID(id)
  if err != nil {
- return processID, nil, nil, errors.New(`malformed process id (not a UUID)`)
+ return processID, nil, nil, err
  }
  manifest, err := reg.LookupLogManifest(ctx, processID)
  if err != nil {
@@ -703,9 +702,9 @@ func describeLog(ctx context.Context, reg *timemachine.Registry, id string, conf
  logSegmentNumber = n
  }
 
- processID, err := uuid.Parse(logID)
+ processID, err := parseProcessID(logID)
  if err != nil {
- return nil, errors.New(`malformed process id (not a UUID)`)
+ return nil, err
  }
 
  m, err := reg.LookupLogManifest(ctx, processID)

export.go

@@ -6,7 +6,6 @@ import (
  "io"
  "os"
 
- "github.com/google/uuid"
  "github.com/stealthrocket/timecraft/format"
 )
 
@@ -61,9 +60,9 @@ func export(ctx context.Context, args []string) error {
 
  var hash format.Hash
  if resource.typ == "process" {
- processID, err := uuid.Parse(args[1])
+ processID, err := parseProcessID(args[1])
  if err != nil {
- return errors.New(`malformed process id (not a UUID)`)
+ return err
  }
  manifest, err := registry.LookupLogManifest(ctx, processID)
  if err != nil {

help.go

@@ -20,6 +20,7 @@ Runtime Commands:
 
 Debugging Commands:
  profile Generate performance profile from execution records
+ trace Generate traces from execution records
 
 Other Commands:
  config View or edit the timecraft configuration
@@ -67,6 +68,8 @@ func help(ctx context.Context, args []string) error {
  msg = runUsage
  case "replay":
  msg = replayUsage
+ case "trace":
+ msg = traceUsage
  case "version":
  msg = versionUsage
  default: