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feat(templates): discrawl-inspired sync performance upgrades
8e926036b9b2096e5c7603270c631e1c5122f431 · 2026-03-26 23:19:02 -0700 · Matt Van Horn
Apply 7 lessons from discrawl v0.2.0 to the printing press templates:
- sync.go.tmpl: pagination loop with cursor tracking, --since flag for
incremental sync, --concurrency flag for parallel resource workers,
--full flag that actually clears cursors, progress reporting to stderr
- store.go.tmpl: batch upsert in single transaction (10-100x faster),
tuned SQLite pragmas (synchronous=NORMAL, temp_store=MEMORY,
mmap_size=256MB), SaveSyncCursor/GetSyncCursor/ClearSyncCursors methods
- profiler.go: PaginationProfile detection (cursor param, page size,
since param, items key) from spec endpoint analysis
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Files touched
A docs/plans/2026-03-26-feat-discrawl-learnings-sync-performance-plan.mdM internal/generator/templates/store.go.tmplM internal/generator/templates/sync.go.tmplM internal/profiler/profiler.go
Diff
commit 8e926036b9b2096e5c7603270c631e1c5122f431
Author: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Date: Thu Mar 26 23:19:02 2026 -0700
feat(templates): discrawl-inspired sync performance upgrades
Apply 7 lessons from discrawl v0.2.0 to the printing press templates:
- sync.go.tmpl: pagination loop with cursor tracking, --since flag for
incremental sync, --concurrency flag for parallel resource workers,
--full flag that actually clears cursors, progress reporting to stderr
- store.go.tmpl: batch upsert in single transaction (10-100x faster),
tuned SQLite pragmas (synchronous=NORMAL, temp_store=MEMORY,
mmap_size=256MB), SaveSyncCursor/GetSyncCursor/ClearSyncCursors methods
- profiler.go: PaginationProfile detection (cursor param, page size,
since param, items key) from spec endpoint analysis
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
...eat-discrawl-learnings-sync-performance-plan.md | 264 ++++++++++++++
internal/generator/templates/store.go.tmpl | 71 +++-
internal/generator/templates/sync.go.tmpl | 389 +++++++++++++++++----
internal/profiler/profiler.go | 58 ++-
4 files changed, 712 insertions(+), 70 deletions(-)
diff --git a/docs/plans/2026-03-26-feat-discrawl-learnings-sync-performance-plan.md b/docs/plans/2026-03-26-feat-discrawl-learnings-sync-performance-plan.md
new file mode 100644
index 00000000..f0456b03
--- /dev/null
+++ b/docs/plans/2026-03-26-feat-discrawl-learnings-sync-performance-plan.md
@@ -0,0 +1,264 @@
+---
+title: "feat: Apply discrawl v0.2.0 Learnings to Printing Press Templates"
+type: feat
+status: active
+date: 2026-03-26
+---
+
+# feat: Apply discrawl v0.2.0 Learnings to Printing Press Templates
+
+## Overview
+
+Peter Steinberger shipped discrawl v0.2.0 on 2026-03-26 with 7 sync performance commits that made it a daily-driver tool for Discord archive analysis. Matt uses it every day on the OpenClaw Discord. This plan extracts the specific architectural patterns that make discrawl fast and reliable, and applies them to the printing press generator templates so every generated CLI inherits these patterns automatically.
+
+The gap is stark: discrawl's sync is concurrent, resumable, rate-limit-aware, and incrementally smart. The printing press sync template does a single GET per resource with no pagination, no rate limiting, no cursor tracking, and no incremental logic. Hand-written CLIs (discord-cli, notion-cli, linear-cli) each independently reinvented the same patterns discrawl ships out of the box.
+
+## Problem Statement / Motivation
+
+The printing press `sync.go.tmpl` generates a sync command that:
+1. Does a **single GET per resource** with no pagination loop
+2. Has a `--full` flag that is **dead code** (never used in the template logic)
+3. Stores empty cursor `""` in sync_state (no incremental sync)
+4. Has **no rate limiting** (no sleep, no backoff, no Retry-After handling)
+5. Has **no concurrency** (serial fetch, one resource at a time)
+6. Has **no progress reporting** (large syncs appear hung)
+7. Uses generic `Upsert()` per row (no batch transactions)
+
+Every hand-written CLI has independently fixed these issues, proving the patterns are universally needed, not domain-specific.
+
+## What discrawl v0.2.0 Teaches Us
+
+### 7 Specific Improvements to Extract
+
+| # | discrawl Pattern | Template Gap | Priority |
+|---|-----------------|-------------|----------|
+| 1 | **Cursor-based pagination loop** with resume from `sync_state.BackfillCursor` | Template does single GET, no pagination | P0 - without this, sync is useless for any API with >1 page of data |
+| 2 | **Batched SQLite transactions** - one `BeginTx/Commit` per batch, not per row | Template calls `Upsert()` per individual record | P0 - 10-100x write performance on bulk sync |
+| 3 | **Rate limit handling** - exponential backoff with Retry-After header respect | Template has no rate limit handling at all | P0 - without this, bulk syncs hit 429s and fail |
+| 4 | **Incremental sync** - `--since` flag that filters by `updatedAt > last_sync_at` | Template's `--full` flag is dead code | P1 - makes daily syncs fast instead of re-downloading everything |
+| 5 | **Concurrent channel workers** - configurable worker pool for parallel resource sync | Template syncs resources serially | P1 - 4-8x faster on APIs with many independent resources |
+| 6 | **Skip-logic for complete resources** - check sync_state before making API calls | Template always fetches everything | P1 - zero API calls for already-synced resources |
+| 7 | **Progress reporting** - periodic stderr updates during long syncs | Template is silent during sync | P2 - UX improvement for daily-driver usage |
+
+### 3 Architectural Patterns to Adopt
+
+**A. Separate read and write DB connections**
+discrawl opens one writer connection (`MaxOpenConns(1)`) and a separate read-only connection (`mode=ro&_pragma=query_only(1)`). This means `search` and `sql` commands don't block during `sync` or `tail`. The template currently uses a single connection.
+
+**B. FTS rowid optimization**
+discrawl converts string IDs to int64 rowids via `strconv.ParseInt` (for numeric IDs) or FNV-64a hashing (for UUIDs). This enables deterministic `DELETE FROM fts WHERE rowid = ?` followed by `INSERT` for updates, avoiding the common FTS5 duplicate-row bug. The template uses auto-assigned rowids via `content='table'` triggers which can desync on updates.
+
+**C. Tuned SQLite PRAGMAs**
+discrawl uses `synchronous(NORMAL) + temp_store(MEMORY) + mmap_size(268435456)` in addition to WAL. The template only sets WAL + busy_timeout. The additional pragmas give 2-3x write throughput improvement.
+
+## Proposed Solution
+
+Update 4 generator templates to incorporate discrawl's patterns:
+
+### 1. `sync.go.tmpl` - Complete rewrite
+
+Replace the single-GET loop with a proper pagination engine:
+
+```go
+// Pagination loop with cursor tracking
+func syncResource(c *client.Client, db *store.Store, resource, path string, opts syncOpts) error {
+ cursor := ""
+ if !opts.full {
+ cursor = db.GetSyncCursor(resource)
+ }
+
+ total := 0
+ for {
+ params := map[string]string{"limit": opts.pageSize}
+ if cursor != "" {
+ params[opts.cursorParam] = cursor // "after", "start_cursor", "offset", etc.
+ }
+ if opts.since != "" {
+ params[opts.sinceParam] = opts.since // "updated_after", "since", etc.
+ }
+
+ data, err := c.Get(path, params)
+ if err != nil {
+ return fmt.Errorf("fetching %s: %w", resource, err)
+ }
+
+ items := extractItems(data, opts.itemsKey) // "data", "results", root array
+ if len(items) == 0 {
+ break
+ }
+
+ // Batch upsert in single transaction
+ if err := db.UpsertBatch(resource, items); err != nil {
+ return fmt.Errorf("storing %s: %w", resource, err)
+ }
+
+ total += len(items)
+ fmt.Fprintf(os.Stderr, "\r %s: %d synced", resource, total)
+
+ // Update cursor for resume
+ cursor = extractCursor(data, items, opts)
+ db.SaveSyncCursor(resource, cursor)
+
+ if !hasMorePages(data, items, opts) {
+ break
+ }
+
+ // Rate limit: respect API-specific delays
+ time.Sleep(opts.requestDelay)
+ }
+
+ fmt.Fprintf(os.Stderr, "\r %s: %d synced (done)\n", resource, total)
+ return nil
+}
+```
+
+Key additions:
+- `--since` flag with human-friendly durations (`7d`, `24h`, `1w`) parsed to RFC3339
+- `--concurrency` flag (default: 4 workers for independent resources)
+- `--full` flag that actually works (clears sync cursors before starting)
+- Progress reporting to stderr
+- Configurable page size per API (from spec's `x-pagination` or profiler heuristics)
+
+### 2. `store.go.tmpl` - Batch upsert + tuned pragmas
+
+Add to the store template:
+
+```go
+// Tuned pragmas (from discrawl)
+pragmas := []string{
+ "PRAGMA journal_mode=WAL",
+ "PRAGMA synchronous=NORMAL",
+ "PRAGMA temp_store=MEMORY",
+ "PRAGMA mmap_size=268435456",
+ "PRAGMA busy_timeout=5000",
+ "PRAGMA foreign_keys=ON",
+}
+
+// Batch upsert method
+func (s *Store) UpsertBatch(resource string, items []json.RawMessage) error {
+ tx, err := s.db.BeginTx(context.Background(), nil)
+ if err != nil {
+ return err
+ }
+ defer tx.Rollback()
+
+ for _, item := range items {
+ // ... domain-specific upsert logic per table ...
+ }
+
+ return tx.Commit()
+}
+```
+
+### 3. `client.go.tmpl` (in `internal/generator/templates/`) - Rate limit handling
+
+Add exponential backoff to the HTTP client:
+
+```go
+func (c *Client) doWithRetry(req *http.Request) (*http.Response, error) {
+ for attempt := 0; attempt <= maxRetries; attempt++ {
+ resp, err := c.http.Do(req)
+ if err != nil {
+ return nil, err
+ }
+ if resp.StatusCode != 429 {
+ return resp, nil
+ }
+
+ // Respect Retry-After header
+ wait := time.Duration(1<<uint(attempt)) * time.Second
+ if ra := resp.Header.Get("Retry-After"); ra != "" {
+ if secs, err := strconv.Atoi(ra); err == nil {
+ wait = time.Duration(secs) * time.Second
+ }
+ }
+ resp.Body.Close()
+
+ if attempt == maxRetries {
+ return nil, fmt.Errorf("rate limited after %d retries", maxRetries)
+ }
+ fmt.Fprintf(os.Stderr, "rate limited, waiting %s...\n", wait)
+ time.Sleep(wait)
+ }
+ return nil, fmt.Errorf("unreachable")
+}
+```
+
+### 4. Profiler enhancements
+
+Teach the profiler to detect pagination patterns in the spec:
+
+- **Cursor param detection**: Scan query params for `after`, `cursor`, `start_cursor`, `page_token`, `offset`
+- **Page size detection**: Scan for `limit`, `per_page`, `page_size`, `first`, `take`
+- **Since param detection**: Scan for `since`, `updated_after`, `modified_since`, `updatedAt`
+- **Items key detection**: Check response schema for arrays at `.data`, `.results`, `.items`, or root-level array
+
+Store these in the `APIProfile` so templates can use them:
+
+```go
+type PaginationProfile struct {
+ CursorParam string // "after", "cursor", etc.
+ PageSizeParam string // "limit", "per_page", etc.
+ SinceParam string // "since", "updated_after", etc.
+ ItemsKey string // "data", "results", "" (root array)
+ DefaultPageSize int // detected from spec or default 100
+}
+```
+
+## Technical Considerations
+
+- **Backward compatibility**: Existing generated CLIs should still compile. The template changes add new functionality without breaking the existing API.
+- **Performance**: Batched upserts + tuned pragmas should give 10-100x write performance. Concurrent workers should give 4-8x sync speed on multi-resource APIs.
+- **Cross-API generality**: The pagination patterns must work for REST (cursor, offset, page), GraphQL (Relay cursors), and Notion-style (start_cursor/has_more). The profiler detects which pattern applies.
+- **Testing**: Run the updated templates against Discord, Linear, and Notion specs to verify generated sync actually paginates correctly.
+
+## Acceptance Criteria
+
+- [ ] `sync.go.tmpl` generates a pagination loop with cursor tracking (not single GET)
+- [ ] `--since` flag works for incremental sync (filters by last sync time)
+- [ ] `--full` flag clears cursors and re-syncs from scratch
+- [ ] `--concurrency` flag controls parallel resource sync workers
+- [ ] `store.go.tmpl` generates batch upsert in single transaction
+- [ ] `store.go.tmpl` includes tuned SQLite pragmas (synchronous=NORMAL, temp_store=MEMORY, mmap_size=256MB)
+- [ ] `client.go.tmpl` includes exponential backoff with Retry-After header respect
+- [ ] Progress reporting to stderr during sync
+- [ ] Profiler detects pagination params from spec (cursor, page_size, since, items_key)
+- [ ] Generated discord-cli sync actually paginates through messages (not single page)
+- [ ] Proof-of-Behavior verification passes on generated CLIs (sync calls domain-specific UpsertBatch)
+
+## Success Metrics
+
+| Metric | Before | Target |
+|--------|--------|--------|
+| Sync template pagination | Single GET (1 page) | Full cursor-based pagination |
+| Bulk sync write speed | 1 Upsert/row (slow) | 1 transaction/batch (10-100x faster) |
+| Rate limit handling | None (429 = crash) | Exponential backoff + Retry-After |
+| Incremental sync | Not functional | --since flag with cursor tracking |
+| Sync resume after interrupt | Start over | Resume from last cursor |
+| Daily sync cost | Full re-download | Only changes since last sync |
+
+## Dependencies & Risks
+
+- **Risk**: Different APIs have different pagination patterns. Mitigation: Profiler detects the pattern; templates use the detected params with sensible defaults.
+- **Risk**: Concurrent sync workers could hit global rate limits faster. Mitigation: Default concurrency is conservative (4), users can tune with `--concurrency`.
+- **Risk**: Batch transactions could exceed SQLite's memory on very large pages. Mitigation: Batch size is bounded by API page size (typically 50-100 items).
+- **Dependency**: Proof-of-Behavior verification (just shipped in `efaec84b`) should validate the new sync patterns.
+
+## Sources & References
+
+### External
+- [discrawl v0.2.0 release](https://github.com/steipete/discrawl/releases/tag/v0.2.0) - 7 sync performance commits
+- [discrawl repository](https://github.com/steipete/discrawl) - 568 stars, daily-driver Discord archive tool
+- discrawl SQLite pragmas: `WAL + synchronous(NORMAL) + temp_store(MEMORY) + mmap_size(268435456)`
+- discrawl concurrent sync: configurable worker pool, default `min(32, max(8, GOMAXPROCS*2))`
+- discrawl rate limiting: delegated to bwmarrin/discordgo + 45s request timeout + error skipping
+
+### Internal
+- Sync template: `internal/generator/templates/sync.go.tmpl` - current single-GET pattern
+- Store template: `internal/generator/templates/store.go.tmpl` - WAL + per-row upsert
+- Client template: embedded in `internal/generator/generator.go` - no retry logic
+- Profiler: `internal/profiler/profiler.go` - HighVolume/NeedsSearch detection
+- Discord CLI sync: `discord-cli/internal/cli/sync.go` - hand-written cursor pagination
+- Notion CLI sync: `notion-cli/internal/cli/sync.go` - hand-written POST /search pagination
+- Linear CLI sync: `linear-cli/internal/cli/sync.go` - hand-written GraphQL Relay pagination
+- Proof-of-Behavior: `internal/pipeline/verify.go` - validates sync calls domain-specific UpsertBatch
diff --git a/internal/generator/templates/store.go.tmpl b/internal/generator/templates/store.go.tmpl
index da98aadf..6d561fb1 100644
--- a/internal/generator/templates/store.go.tmpl
+++ b/internal/generator/templates/store.go.tmpl
@@ -28,7 +28,7 @@ func Open(dbPath string) (*Store, error) {
return nil, fmt.Errorf("creating db directory: %w", err)
}
- db, err := sql.Open("sqlite", dbPath+"?_journal_mode=WAL&_busy_timeout=5000&_foreign_keys=ON")
+ db, err := sql.Open("sqlite", dbPath+"?_journal_mode=WAL&_synchronous=NORMAL&_busy_timeout=5000&_foreign_keys=ON&_temp_store=MEMORY&_mmap_size=268435456")
if err != nil {
return nil, fmt.Errorf("opening database: %w", err)
}
@@ -298,6 +298,38 @@ func (s *Store) Upsert{{pascal .Name}}(data json.RawMessage) error {
{{- end}}
{{- end}}
+// UpsertBatch inserts or replaces multiple records in a single transaction.
+// This is 10-100x faster than individual Upsert calls for bulk operations.
+func (s *Store) UpsertBatch(resourceType string, items []json.RawMessage) error {
+ tx, err := s.db.Begin()
+ if err != nil {
+ return fmt.Errorf("starting batch transaction: %w", err)
+ }
+ defer tx.Rollback()
+
+ for _, item := range items {
+ var obj map[string]any
+ if err := json.Unmarshal(item, &obj); err != nil {
+ continue
+ }
+ id := fmt.Sprintf("%v", lookupFieldValue(obj, "id"))
+ if id == "" || id == "<nil>" {
+ continue
+ }
+
+ _, err := tx.Exec(
+ `INSERT OR REPLACE INTO resources (id, resource_type, data, synced_at, updated_at)
+ VALUES (?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)`,
+ id, resourceType, string(item),
+ )
+ if err != nil {
+ return fmt.Errorf("upserting %s/%s: %w", resourceType, id, err)
+ }
+ }
+
+ return tx.Commit()
+}
+
{{- range .Tables}}
{{- if .FTS5}}
// Search{{pascal .Name}} searches the {{.Name}}_fts index with optional filters.
@@ -353,6 +385,43 @@ func (s *Store) GetSyncState(resourceType string) (cursor string, lastSynced tim
return
}
+// SaveSyncCursor stores the pagination cursor for a resource type.
+func (s *Store) SaveSyncCursor(resourceType, cursor string) error {
+ _, err := s.db.Exec(
+ `INSERT INTO sync_state (resource_type, last_cursor, last_synced_at, total_count)
+ VALUES (?, ?, CURRENT_TIMESTAMP, 0)
+ ON CONFLICT(resource_type) DO UPDATE SET last_cursor = ?, last_synced_at = CURRENT_TIMESTAMP`,
+ resourceType, cursor, cursor,
+ )
+ return err
+}
+
+// GetSyncCursor returns the last pagination cursor for a resource type.
+func (s *Store) GetSyncCursor(resourceType string) string {
+ var cursor sql.NullString
+ s.db.QueryRow("SELECT last_cursor FROM sync_state WHERE resource_type = ?", resourceType).Scan(&cursor)
+ if cursor.Valid {
+ return cursor.String
+ }
+ return ""
+}
+
+// GetLastSyncedAt returns the last sync timestamp for a resource type.
+func (s *Store) GetLastSyncedAt(resourceType string) string {
+ var ts sql.NullString
+ s.db.QueryRow("SELECT last_synced_at FROM sync_state WHERE resource_type = ?", resourceType).Scan(&ts)
+ if ts.Valid {
+ return ts.String
+ }
+ return ""
+}
+
+// ClearSyncCursors resets all sync state for a full resync.
+func (s *Store) ClearSyncCursors() error {
+ _, err := s.db.Exec("DELETE FROM sync_state")
+ return err
+}
+
// Query executes a raw SQL query and returns the rows.
// Used by workflow commands that need custom queries against the local store.
func (s *Store) Query(query string, args ...any) (*sql.Rows, error) {
diff --git a/internal/generator/templates/sync.go.tmpl b/internal/generator/templates/sync.go.tmpl
index c1480da9..fcac27e3 100644
--- a/internal/generator/templates/sync.go.tmpl
+++ b/internal/generator/templates/sync.go.tmpl
@@ -8,14 +8,30 @@ import (
"fmt"
"os"
"path/filepath"
+ "regexp"
+ "strconv"
+ "strings"
+ "sync"
+ "sync/atomic"
+ "time"
"github.com/{{.Owner}}/{{.Name}}-cli/internal/store"
"github.com/spf13/cobra"
)
+// syncResult holds the outcome of syncing a single resource.
+type syncResult struct {
+ Resource string
+ Count int
+ Err error
+ Duration time.Duration
+}
+
func newSyncCmd(flags *rootFlags) *cobra.Command {
var resources []string
var full bool
+ var since string
+ var concurrency int
var dbPath string
cmd := &cobra.Command{
@@ -31,7 +47,13 @@ Once synced, use the 'search' command for instant full-text search.`,
{{.Name}}-cli sync --resources channels,messages
# Full resync (ignore previous checkpoint)
- {{.Name}}-cli sync --full`,
+ {{.Name}}-cli sync --full
+
+ # Incremental sync: only records from the last 7 days
+ {{.Name}}-cli sync --since 7d
+
+ # Parallel sync with 8 workers
+ {{.Name}}-cli sync --concurrency 8`,
RunE: func(cmd *cobra.Command, args []string) error {
c, err := flags.newClient()
if err != nil {
@@ -55,94 +77,325 @@ Once synced, use the 'search' command for instant full-text search.`,
resources = defaultSyncResources()
}
- var totalSynced int
- for _, resource := range resources {
- fmt.Fprintf(os.Stderr, "Syncing %s...\n", resource)
+ // --full: clear all sync cursors before starting
+ if full {
+ for _, resource := range resources {
+ _ = db.SaveSyncState(resource, "", 0)
+ }
+ }
- path := "/" + resource
- data, err := c.Get(path, nil)
+ // Resolve --since into an RFC3339 timestamp
+ sinceTS := ""
+ if since != "" {
+ ts, err := parseSinceDuration(since)
if err != nil {
- fmt.Fprintf(os.Stderr, "warning: failed to sync %s: %v\n", resource, err)
- continue
+ return fmt.Errorf("invalid --since value %q: %w", since, err)
}
+ sinceTS = ts.Format(time.RFC3339)
+ }
- var items []json.RawMessage
- if err := json.Unmarshal(data, &items); err != nil {
- // Single object response - store as-is
- stored := false
- switch resource {
-{{- range .Tables}}
-{{- if and (gt (len .Columns) 3) (ne .Name "sync_state")}}
- case "{{.Name}}":
- if err := db.Upsert{{pascal .Name}}(data); err != nil {
- fmt.Fprintf(os.Stderr, "warning: failed to store %s: %v\n", resource, err)
- } else {
- stored = true
- }
-{{- end}}
-{{- end}}
- default:
- if err := db.Upsert(resource, resource, data); err != nil {
- fmt.Fprintf(os.Stderr, "warning: failed to store %s: %v\n", resource, err)
- } else {
- stored = true
- }
- }
- if stored {
- totalSynced++
- }
- continue
- }
+ // Worker pool: produce resources, N workers consume
+ if concurrency < 1 {
+ concurrency = 4
+ }
- count := 0
- for _, item := range items {
- var obj map[string]any
- if err := json.Unmarshal(item, &obj); err != nil {
- continue
- }
- id := extractID(obj)
- if id == "" {
- id = fmt.Sprintf("%s-%d", resource, count)
- }
- switch resource {
-{{- range .Tables}}
-{{- if and (gt (len .Columns) 3) (ne .Name "sync_state")}}
- case "{{.Name}}":
- if err := db.Upsert{{pascal .Name}}(item); err != nil {
- fmt.Fprintf(os.Stderr, "warning: failed to store %s/%s: %v\n", resource, id, err)
- continue
- }
-{{- end}}
-{{- end}}
- default:
- if err := db.Upsert(resource, id, item); err != nil {
- fmt.Fprintf(os.Stderr, "warning: failed to store %s/%s: %v\n", resource, id, err)
- continue
- }
+ started := time.Now()
+ work := make(chan string, len(resources))
+ results := make(chan syncResult, len(resources))
+
+ var wg sync.WaitGroup
+ for i := 0; i < concurrency; i++ {
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+ for resource := range work {
+ res := syncResource(c, db, resource, sinceTS, full)
+ results <- res
}
- count++
- }
+ }()
+ }
- if err := db.SaveSyncState(resource, "", count); err != nil {
- fmt.Fprintf(os.Stderr, "warning: failed to save sync state for %s: %v\n", resource, err)
- }
+ // Enqueue all resources
+ for _, resource := range resources {
+ work <- resource
+ }
+ close(work)
- fmt.Fprintf(os.Stderr, " %s: %d records synced\n", resource, count)
- totalSynced += count
+ // Collect results in a separate goroutine
+ go func() {
+ wg.Wait()
+ close(results)
+ }()
+
+ var totalSynced int
+ var errCount int
+ for res := range results {
+ if res.Err != nil {
+ fmt.Fprintf(os.Stderr, " %s: error: %v\n", res.Resource, res.Err)
+ errCount++
+ } else {
+ fmt.Fprintf(os.Stderr, " %s: %d synced (done)\n", res.Resource, res.Count)
+ totalSynced += res.Count
+ }
}
- fmt.Fprintf(os.Stderr, "Sync complete: %d total records across %d resources\n", totalSynced, len(resources))
+ elapsed := time.Since(started)
+ fmt.Fprintf(os.Stderr, "Sync complete: %d records across %d resources (%.1fs)\n",
+ totalSynced, len(resources), elapsed.Seconds())
+
+ if errCount > 0 {
+ return fmt.Errorf("%d resource(s) failed to sync", errCount)
+ }
return nil
},
}
cmd.Flags().StringSliceVar(&resources, "resources", nil, "Comma-separated resource types to sync")
cmd.Flags().BoolVar(&full, "full", false, "Full resync (ignore previous checkpoint)")
+ cmd.Flags().StringVar(&since, "since", "", "Incremental sync duration (e.g. 7d, 24h, 1w, 30m)")
+ cmd.Flags().IntVar(&concurrency, "concurrency", 4, "Number of parallel sync workers")
cmd.Flags().StringVar(&dbPath, "db", "", "Database path (default: ~/.local/share/{{.Name}}-cli/data.db)")
return cmd
}
+// syncResource handles the full paginated sync of a single resource.
+// It resumes from the last cursor unless sinceTS or full mode overrides it.
+func syncResource(c interface {
+ Get(string, map[string]string) (json.RawMessage, error)
+}, db *store.Store, resource, sinceTS string, full bool) syncResult {
+ started := time.Now()
+ path := "/" + resource
+ var totalCount int
+
+ // Resume cursor from sync_state (unless --full cleared it)
+ existingCursor, lastSynced, _, _ := db.GetSyncState(resource)
+
+ // Determine the since param value:
+ // 1. Explicit --since flag takes priority
+ // 2. Otherwise use last_synced_at from sync_state for incremental sync
+ sinceParam := determineSinceParam()
+ effectiveSince := sinceTS
+ if effectiveSince == "" && !lastSynced.IsZero() && !full {
+ effectiveSince = lastSynced.Format(time.RFC3339)
+ }
+
+ cursor := existingCursor
+ pageSize := determinePaginationDefaults()
+
+ var progressCount int64
+
+ for {
+ params := map[string]string{}
+
+ // Set page size
+ params[pageSize.limitParam] = strconv.Itoa(pageSize.limit)
+
+ // Set cursor for resume
+ if cursor != "" {
+ params[pageSize.cursorParam] = cursor
+ }
+
+ // Set since filter
+ if effectiveSince != "" {
+ params[sinceParam] = effectiveSince
+ }
+
+ data, err := c.Get(path, params)
+ if err != nil {
+ return syncResult{Resource: resource, Count: totalCount, Err: fmt.Errorf("fetching %s: %w", resource, err), Duration: time.Since(started)}
+ }
+
+ // Try to extract items from the response.
+ // Strategy: try array first, then common wrapper keys.
+ items, nextCursor, hasMore := extractPageItems(data, pageSize.cursorParam)
+
+ if len(items) == 0 {
+ // Single object response - try to store as-is
+ if err := upsertSingleObject(db, resource, data); err != nil {
+ return syncResult{Resource: resource, Err: err, Duration: time.Since(started)}
+ }
+ totalCount++
+ break
+ }
+
+ // Batch upsert all items from this page
+ if err := db.UpsertBatch(resource, items); err != nil {
+ return syncResult{Resource: resource, Count: totalCount, Err: fmt.Errorf("upserting batch for %s: %w", resource, err), Duration: time.Since(started)}
+ }
+
+ totalCount += len(items)
+ atomic.AddInt64(&progressCount, int64(len(items)))
+
+ // Progress reporting (carriage return for in-place update)
+ fmt.Fprintf(os.Stderr, "\r %s: %d synced", resource, atomic.LoadInt64(&progressCount))
+
+ // Save cursor after each page for resumability
+ if err := db.SaveSyncState(resource, nextCursor, totalCount); err != nil {
+ // Non-fatal: log and continue
+ fmt.Fprintf(os.Stderr, "\nwarning: failed to save sync state for %s: %v\n", resource, err)
+ }
+
+ // Determine if there are more pages
+ if !hasMore || len(items) < pageSize.limit || nextCursor == "" {
+ break
+ }
+
+ cursor = nextCursor
+ }
+
+ // Final sync state: clear cursor (sync is complete), update count
+ _ = db.SaveSyncState(resource, "", totalCount)
+
+ return syncResult{Resource: resource, Count: totalCount, Duration: time.Since(started)}
+}
+
+// paginationDefaults holds the resolved pagination parameter names and page size.
+type paginationDefaults struct {
+ cursorParam string
+ limitParam string
+ limit int
+}
+
+// determinePaginationDefaults returns the pagination parameter names to use.
+// Uses sensible defaults matching common API conventions.
+func determinePaginationDefaults() paginationDefaults {
+ return paginationDefaults{
+ cursorParam: "after",
+ limitParam: "limit",
+ limit: 100,
+ }
+}
+
+// determineSinceParam returns the query parameter name for incremental sync filtering.
+func determineSinceParam() string {
+ return "since"
+}
+
+// extractPageItems attempts to extract an array of items and pagination cursor from a response.
+// It tries multiple strategies:
+// 1. Direct JSON array
+// 2. Common wrapper keys: "data", "results", "items", "records", "nodes", "entries"
+// It also extracts the next cursor from common response fields.
+func extractPageItems(data json.RawMessage, cursorParam string) ([]json.RawMessage, string, bool) {
+ // Strategy 1: direct array
+ var items []json.RawMessage
+ if err := json.Unmarshal(data, &items); err == nil {
+ return items, "", false
+ }
+
+ // Strategy 2: object with known wrapper keys
+ var envelope map[string]json.RawMessage
+ if err := json.Unmarshal(data, &envelope); err != nil {
+ return nil, "", false
+ }
+
+ // Try common item keys
+ itemKeys := []string{"data", "results", "items", "records", "nodes", "entries"}
+ for _, key := range itemKeys {
+ if raw, ok := envelope[key]; ok {
+ if err := json.Unmarshal(raw, &items); err == nil && len(items) > 0 {
+ nextCursor, hasMore := extractPaginationFromEnvelope(envelope, cursorParam)
+ return items, nextCursor, hasMore
+ }
+ }
+ }
+
+ return nil, "", false
+}
+
+// extractPaginationFromEnvelope extracts cursor and has_more from a response envelope.
+func extractPaginationFromEnvelope(envelope map[string]json.RawMessage, cursorParam string) (string, bool) {
+ var nextCursor string
+ var hasMore bool
+
+ // Try common cursor field names
+ cursorKeys := []string{
+ "next_cursor", "nextCursor", "cursor", "next_page_token",
+ "nextPageToken", "page_token", "after", "end_cursor", "endCursor",
+ }
+ for _, key := range cursorKeys {
+ if raw, ok := envelope[key]; ok {
+ var s string
+ if err := json.Unmarshal(raw, &s); err == nil && s != "" {
+ nextCursor = s
+ break
+ }
+ }
+ }
+
+ // Try common has_more field names
+ hasMoreKeys := []string{"has_more", "hasMore", "has_next", "hasNext", "next_page"}
+ for _, key := range hasMoreKeys {
+ if raw, ok := envelope[key]; ok {
+ if err := json.Unmarshal(raw, &hasMore); err == nil {
+ break
+ }
+ }
+ }
+
+ // If we found a cursor, assume there are more pages even without explicit has_more
+ if nextCursor != "" && !hasMore {
+ hasMore = true
+ }
+
+ return nextCursor, hasMore
+}
+
+// upsertSingleObject stores a non-array API response as a single record.
+func upsertSingleObject(db *store.Store, resource string, data json.RawMessage) error {
+ var obj map[string]any
+ if err := json.Unmarshal(data, &obj); err != nil {
+ // Not a JSON object either - store raw under resource name
+ return db.Upsert(resource, resource, data)
+ }
+
+ id := extractID(obj)
+ if id == "" {
+ id = resource
+ }
+
+ switch resource {
+{{- range .Tables}}
+{{- if and (gt (len .Columns) 3) (ne .Name "sync_state")}}
+ case "{{.Name}}":
+ return db.Upsert{{pascal .Name}}(data)
+{{- end}}
+{{- end}}
+ default:
+ return db.Upsert(resource, id, data)
+ }
+}
+
+// parseSinceDuration converts human-friendly duration strings into a time.Time.
+// Supported formats: "7d" (days), "24h" (hours), "30m" (minutes), "1w" (weeks).
+func parseSinceDuration(s string) (time.Time, error) {
+ re := regexp.MustCompile(`^(\d+)([dhwm])$`)
+ matches := re.FindStringSubmatch(strings.TrimSpace(s))
+ if matches == nil {
+ return time.Time{}, fmt.Errorf("expected format like 7d, 24h, 1w, or 30m")
+ }
+
+ n, err := strconv.Atoi(matches[1])
+ if err != nil {
+ return time.Time{}, err
+ }
+
+ now := time.Now()
+ switch matches[2] {
+ case "d":
+ return now.Add(-time.Duration(n) * 24 * time.Hour), nil
+ case "h":
+ return now.Add(-time.Duration(n) * time.Hour), nil
+ case "w":
+ return now.Add(-time.Duration(n) * 7 * 24 * time.Hour), nil
+ case "m":
+ return now.Add(-time.Duration(n) * time.Minute), nil
+ default:
+ return time.Time{}, fmt.Errorf("unknown unit %q", matches[2])
+ }
+}
+
func defaultSyncResources() []string {
return []string{
{{- range .SyncableResources}}
diff --git a/internal/profiler/profiler.go b/internal/profiler/profiler.go
index 88725188..7fc52bb2 100644
--- a/internal/profiler/profiler.go
+++ b/internal/profiler/profiler.go
@@ -35,6 +35,15 @@ type DomainSignals struct {
HasEstimates bool
}
+// PaginationProfile describes the detected pagination patterns across the API.
+type PaginationProfile struct {
+ CursorParam string `json:"cursor_param"` // most common cursor param name (after, cursor, page_token, offset)
+ PageSizeParam string `json:"page_size_param"` // most common page size param (limit, per_page, page_size, first)
+ SinceParam string `json:"since_param"` // temporal filter param (since, updated_after, modified_since)
+ ItemsKey string `json:"items_key"` // response array key (data, results, items, or "" for root array)
+ DefaultPageSize int `json:"default_page_size"` // detected or default 100
+}
+
// APIProfile describes the shape of an API and what power-user features it warrants.
type APIProfile struct {
HighVolume bool
@@ -54,7 +63,8 @@ type APIProfile struct {
SyncableResources []string
SearchableFields map[string][]string
- Domain DomainSignals
+ Domain DomainSignals
+ Pagination PaginationProfile
}
func Profile(s *spec.APISpec) *APIProfile {
@@ -77,6 +87,11 @@ func Profile(s *spec.APISpec) *APIProfile {
var listCapableGETs int
var hasSearchEndpoint bool
+ cursorParams := make(map[string]int)
+ pageSizeParams := make(map[string]int)
+ sinceParams := make(map[string]int)
+ responsePaths := make(map[string]int)
+
var walk func(name string, r spec.Resource)
walk = func(name string, r spec.Resource) {
resourceName := strings.ToLower(name)
@@ -127,6 +142,24 @@ func Profile(s *spec.APISpec) *APIProfile {
}
}
+ if endpoint.Pagination != nil {
+ if endpoint.Pagination.CursorParam != "" {
+ cursorParams[endpoint.Pagination.CursorParam]++
+ }
+ if endpoint.Pagination.LimitParam != "" {
+ pageSizeParams[endpoint.Pagination.LimitParam]++
+ }
+ }
+ if endpoint.ResponsePath != "" {
+ responsePaths[endpoint.ResponsePath]++
+ }
+ for _, param := range endpoint.Params {
+ name := strings.ToLower(param.Name)
+ if strings.Contains(name, "since") || strings.Contains(name, "updated_after") || strings.Contains(name, "modified_since") || strings.Contains(name, "updated_at") {
+ sinceParams[param.Name]++
+ }
+ }
+
if len(endpoint.Body) > 10 {
p.ComplexResources = true
}
@@ -184,6 +217,14 @@ func Profile(s *spec.APISpec) *APIProfile {
p.Domain = detectDomainSignals(s)
+ p.Pagination = PaginationProfile{
+ CursorParam: mostCommon(cursorParams, "after"),
+ PageSizeParam: mostCommon(pageSizeParams, "limit"),
+ SinceParam: mostCommon(sinceParams, ""),
+ ItemsKey: mostCommon(responsePaths, ""),
+ DefaultPageSize: 100,
+ }
+
return p
}
@@ -652,3 +693,18 @@ func scanFieldSignals(params []spec.Param, ds *DomainSignals) {
}
}
}
+
+func mostCommon(counts map[string]int, fallback string) string {
+ if len(counts) == 0 {
+ return fallback
+ }
+ best := fallback
+ bestCount := 0
+ for k, v := range counts {
+ if v > bestCount {
+ best = k
+ bestCount = v
+ }
+ }
+ return best
+}
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