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feat(migrate): add export clerk and export supabase, and import by export run ID - #524

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@royanger royanger commented Oct 6, 2026

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PR 6 of 13 for clerk migrate (plan: slice-prs.md on #479). Stacked on #515: review that first, then this one, which shows only its own diff. It adds exports from Clerk and Supabase, and importing by export run ID. Still behind CLERK_EXPERIMENTAL=migrate.

Try it

CLERK_EXPERIMENTAL=migrate clerk migrate export clerk --app <app> --instance dev
CLERK_EXPERIMENTAL=migrate clerk migrate export supabase --db-url "$SUPABASE_DB_URL"
CLERK_EXPERIMENTAL=migrate clerk migrate import <export-run-id> --dry-run

What it does

  • export clerk pages a whole instance through GET /v1/users, oldest first.
  • export supabase reads auth.users through --db-url, SUPABASE_DB_URL, or a prompt.
  • Each export is a run. Its export.json wraps the users in an envelope that names the source, so import <export-run-id> needs no file or --source.
  • .gitignore gains exports/ and *service-account*.json. scripts/check-bun-version.ts gains the MySQL note.

Reviewing

Ported from #479 at 7a820406. New files match #479, trimmed to Clerk and Supabase: export/index.ts, export/registry.ts, lib/db.ts (DbPlatform is "supabase" only; 4d and 4e add theirs). The envelope branch in transform.ts still runs rows through assertUserRows.

Not ported: NETWORK_UNREACHABLE and the describeBapiTarget wording ship as separate small PRs, so one input-retry test uses a plain CliError, and one export clerk test no longer asserts keySource.

Tests

  • bun run test covers the unit and integration tests.
  • The live slice suite (pnpm test:migrate:slice3 in migration-test-apps) exports from the real Clerk and Supabase test apps and imports into a dev instance.

🤖 Generated with Claude Code

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🦋 Changeset detected

Latest commit: 9da0cfa

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package
Name Type
clerk Minor

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📝 Walkthrough

The migration CLI adds Clerk and Supabase export commands. Clerk exports users through the API, and Supabase exports users from auth.users through database clients. Exports write versioned files and record export runs. Imports accept files or export-run IDs, infer sources from export envelopes, and check file hashes during processing. The changes also add credential retry handling, database error redaction, export reporting, tests, and documentation.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~60 minutes

Merge Risk: 🟡 Moderate · up to 9da0c

Large Supabase exports may exhaust memory, and exports written to permissive Windows directories may expose sensitive user data. Address or explicitly accept these risks before merging.

Pre-merge checks: Passed 4 · Failed 1

Failed Failed checks: 1 warning

Check name Status Explanation Resolution
Docstring Coverage Warning Docstring coverage is 73.42% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 79 functions across 29 files. Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed Passed checks: 4 passed
Check name Status Explanation
Title check Passed The title clearly and concisely summarizes the main changes: adding Clerk and Supabase exports and supporting imports by export run ID.
Description check Passed The description directly explains the export commands, export-run import flow, configuration, testing, and scope of the changes.
Linked Issues check Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check Passed Check skipped because no linked issues were found for this pull request.
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@royanger
royanger added this pull request to stack #521 October 6, 2026 23:22
@royanger
royanger marked this pull request as ready for review October 6, 2026 23:36

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Actionable comments posted: 3


  • 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @packages/cli-core/src/commands/migrate/export/shared.ts:
- Around line 60-65: Update writeExportFile to call fs.chmodSync(file, 0o600)
after writing the export so existing files also receive owner-only permissions.

Review comments at @packages/cli-core/src/commands/migrate/lib/db.ts:
- Around line 18-19: Update the build configuration for @clerk/cli-core so its
bundler targets Bun rather than the browser, allowing the `bun:sqlite` and `bun`
imports in `bunSqlClient` to build successfully.
- Around line 171-184: Add a 30-second timeout signal to the libsql fetch call
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  • packages/cli-core/src/commands/migrate/export/clerk-source.test.ts
  • packages/cli-core/src/commands/migrate/export/clerk-source.ts
  • packages/cli-core/src/commands/migrate/export/clerk.test.ts
  • packages/cli-core/src/commands/migrate/export/clerk.ts
  • packages/cli-core/src/commands/migrate/export/db-exports.test.ts
  • packages/cli-core/src/commands/migrate/export/db-options.ts
  • packages/cli-core/src/commands/migrate/export/index.ts
  • packages/cli-core/src/commands/migrate/export/registry.test.ts
  • packages/cli-core/src/commands/migrate/export/registry.ts
  • packages/cli-core/src/commands/migrate/export/shared.test.ts
  • packages/cli-core/src/commands/migrate/export/shared.ts
  • packages/cli-core/src/commands/migrate/export/supabase.ts
  • packages/cli-core/src/commands/migrate/index.test.ts
  • packages/cli-core/src/commands/migrate/index.ts
  • packages/cli-core/src/commands/migrate/lib/db.test.ts
  • packages/cli-core/src/commands/migrate/lib/db.ts
  • packages/cli-core/src/commands/migrate/lib/export-file.ts
  • packages/cli-core/src/commands/migrate/lib/input-retry.test.ts
  • packages/cli-core/src/commands/migrate/lib/input-retry.ts
  • packages/cli-core/src/commands/migrate/lib/transform.test.ts
  • packages/cli-core/src/commands/migrate/lib/transform.ts
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Comment thread packages/cli-core/src/commands/migrate/export/shared.ts
Comment thread packages/cli-core/src/commands/migrate/lib/db.ts
Comment thread packages/cli-core/src/commands/migrate/lib/db.ts

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Review comments at @packages/cli-core/src/commands/migrate/lib/db.ts:
- Around line 69-71: Update the connectionString credential-redaction regex to
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Comment thread packages/cli-core/src/commands/migrate/lib/db.ts

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Sent from Claude

Comment thread packages/cli-core/src/commands/migrate/export/supabase.ts Outdated
Comment thread packages/cli-core/src/commands/migrate/export/clerk-source.ts
Comment thread packages/cli-core/src/commands/migrate/export/supabase.ts Outdated
Comment thread packages/cli-core/src/commands/migrate/run.ts Outdated
Comment thread packages/cli-core/src/commands/migrate/export/clerk.ts Outdated
Comment thread packages/cli-core/src/commands/migrate/export/index.ts

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🟡 Minor · Set the output mode before writing the export. · shared.ts:50-66

packages/cli-core/src/commands/migrate/export/shared.ts:50-66
🔒 Security & Privacy | 🟡 Minor | ⚡ Quick win

Set the output mode before writing the export.

When --output names an existing permissive file, fs.writeFileSync replaces its contents before fs.chmodSync changes the mode. A concurrent local reader can access the exported data during that window. An interrupted or failed write can also leave the file permissive.

Open the file without truncating it, apply fchmodSync(file descriptor, 0o600), then truncate and write it.

Suggested fix
   // Password hashes, PII and a Firebase signer key: owner-only.
   fs.mkdirSync(path.dirname(file), { recursive: true, mode: 0o700 });
-  fs.writeFileSync(file, JSON.stringify(envelope, null, 2), { mode: 0o600 });
-  // `mode` only applies on create; an existing `--output` keeps its own.
-  fs.chmodSync(file, 0o600);
+  const fd = fs.openSync(file, "a+", 0o600);
+  try {
+    fs.fchmodSync(fd, 0o600);
+    fs.ftruncateSync(fd, 0);
+    fs.writeFileSync(fd, JSON.stringify(envelope, null, 2));
+  } finally {
+    fs.closeSync(fd);
+  }
   return file;
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Review comment at @packages/cli-core/src/commands/migrate/export/shared.ts
around lines 50 - 66:
Update writeExportFile to secure the file before replacing its contents: open it
without truncation, set its mode to owner-only through the file descriptor, then
truncate and write the export. Ensure the descriptor is closed on success or
failure.

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Inline comments:
Review comments at @packages/cli-core/src/commands/migrate/run.ts:
- Line 302: Before returning the recorded export from this branch, validate that
the current file hash matches record.file.sha256 and that the envelope’s runId
and source match the recorded run. Reject the export if any of these checks
fail; preserve the existing return behavior for verified records.

---

Outside diff comments:
Review comments at @packages/cli-core/src/commands/migrate/export/shared.ts:
- Around line 50-66: Update writeExportFile to secure the file before replacing
its contents: open it without truncation, set its mode to owner-only through the
file descriptor, then truncate and write the export. Ensure the descriptor is
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Actionable comments posted: 1

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🟡 Minor · Record the export link when continuing an import. · run.ts:866

packages/cli-core/src/commands/migrate/run.ts:866
🔒 Security & Privacy | 🟡 Minor | ⚡ Quick win

Record the export link when continuing an import.

If a partial import started from a file path, then continues by export run ID, findResume selects the existing import record. This assignment runs only for a new record, so the continued record lacks fromExport. cleanupLines then omits the instruction to delete the export containing user data. Update the continued record with the originating export ID.

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Review comment at @packages/cli-core/src/commands/migrate/run.ts at line 866:
Update the import continuation flow around findResume so a resumed import record
also stores the originating export ID from input.fromExport, rather than
assigning it only when creating a new record; ensure cleanupLines can use that
link.

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Review comments at @packages/cli-core/src/commands/migrate/run.ts:
- Line 311: Keep run-ID validation in the resume flow tied to the contents later
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recheck the export record’s hash immediately before creating any users. Ensure
`run` cannot import overwritten file contents under the original export run ID.

---

Outside diff comments:
Review comments at @packages/cli-core/src/commands/migrate/run.ts:
- Line 866: Update the import continuation flow around findResume so a resumed
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Comment thread packages/cli-core/src/commands/migrate/run.ts
@royanger
royanger requested a review from wyattjoh October 8, 2026 20:52

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Inline comments:
Review comments at @packages/cli-core/src/commands/migrate/run.ts:
- Around line 707-709: Recheck the recorded export hash after the
`readSupabaseRows` attempt in the Supabase provider path, outside its
`try`/`catch`, so a failed read cannot bypass validation. Use the existing
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Comment thread packages/cli-core/src/commands/migrate/run.ts Outdated
@royanger
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- Around line 142-143: Update the user status list in the README to include
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Comment thread packages/cli-core/src/commands/migrate/README.md
royanger and others added 26 commits October 16, 2026 18:28
The whole read sat inside the credential retry, and withDbClient turns
every query error into a usage error, so a statement timeout partway
through auth.users asked for the connection string again, though it had
been accepted, and exited 2. withDbConnection retries the connect alone,
then runs the read: a failure there exits 1 with its hint.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…up hint

With export --output, the file holding the password hashes is not in
the export run's folder, so deleting the folder as suggested left it on
disk. The hint now adds an rm for that file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
… user

With oldest-first offset paging, a user deleted after an earlier page
shifts every later row back one, so the row at the next page boundary
was skipped, not repeated as the comment said, and the export reported
success one user short. A count check can't see this: the deletion and
the skip cancel out. Each page now re-reads the last 20 rows of the one
before, and the Map drops the repeats.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
-y reads "Do not prompt", but only the credential retry honored it: in
a linked directory the Clerk export still showed its instance picker,
and the Supabase export still asked for a connection string. Under -y
the picker takes the resolved instance, as an agent does, and a missing
connection string is the usage error naming --db-url.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…port

An export run ID resolved to whatever sat at the path it recorded. With
--output, a later export or an edit can overwrite that path, and the old
run ID then imported different users under its name. The file's hash
and envelope run ID are now checked against the run, and a file that is
gone or changed exits 2 with nothing imported.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The run-ID check hashed the file in resolveInput, but the users load
later, and an export overwriting a shared --output path in between was
imported under the old run's name. The recorded hash now comes along:
it is compared with the hash taken for resume matching, and again right
after the users load, before the checks or any create.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The recheck came after the user load, but a Supabase import reads the
file again for its provider rows, so an export overwriting the path in
between paired one export's users with another's providers. The check
now runs after that read, outside its try.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A path import read the file's envelope, then its users, with nothing
tying the two reads together: a file replaced in between could pair the
old envelope (its source, a Firebase export's hash parameters) with the
new users. The file is now hashed before the envelope is read, and the
existing checks before and after the last read compare against that
revision for every import, not only one by export run ID.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
… export to it

The export was written to an existing `--output` file and only then
chmod'ed to 0600, so its password hashes and PII sat at the file's old
mode in between, or for good if the write failed first. The file is now
opened without truncating, made owner-only, then truncated and written.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
An import started by path and continued by export run ID kept a record
with no `fromExport`, since only a new run set it. The cleanup at the
end then left out the note to delete the export that holds the users'
data. A continue by export run ID now records the link.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…connecting

The Supabase export reads `auth.users` with Postgres syntax, but took
any connection string the database helper accepts: a MySQL or SQLite
URL connected and then failed with nothing exported. Anything but
postgres:// or postgresql:// is now refused up front, naming where to
find the right one.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Truncating an existing `--output` before writing it meant a failed write
destroyed the export that was there, and a short write could leave a
partial file recorded as complete. The export is now written whole to a
new owner-only file beside it, then renamed into place; a failure
removes the temp file and leaves the old one as it was.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The export reads every `auth.users` row at once. The import reads the
file whole as well, so paging one side alone would not help; the
comment says where to page both if that ever matters.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
… only

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ft unused

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…th, not just the first

The check only saw the first connection string. A retry after a refused
connect took a MySQL URL or a SQLite path, which connected and then failed the
auth.users query. The dialect now lives in the platform's config, so the flag,
the environment variable and every prompt check it, and the help and messages
name only Postgres.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ow, before any request

`--source` goes through the registry, but the envelope's source did not. A file
from a newer CLI, or an edited one, reached BAPI and then failed in getSource
with a plain Error and no list of valid sources.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
… its run

A write to a directory or an unwritable --output escaped as a raw fs error and
left the run locked, with every user's line but no file. An import by that run
ID then called it a run with no file to import. Now the write failure names
the path, the run is released, and the import says the export never wrote
its file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The import reads a file by its extension, so an envelope written to
users.ndjson or users.csv could not be imported by its run ID. The export now
refuses such a path before it reads anything.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The retry comment said a refused connection is not fixed by another
credential, but connect failures are usage errors and are re-asked. That is
deliberate: Bun reports a mistyped host or port the same way as a server that
is down.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
… cleanup

path.relative returns an absolute path across drives, so the `rm` line for the
file was left out.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…nymous users

The import skips an anonymous user, but the export never selected the column,
so those users came through as having no identifier.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…he destination, and keep --runs-dir in export hints

From Michael's review of #524:

- export clerk pages GET /v1/users with starting_after the last user of the
  page before, so a deletion can't slide a user past a page boundary. A
  deleted cursor user (422) stops the export instead of skipping anyone.
- With nobody to ask (agent mode, --json, -y), export clerk refuses an
  instance resolved on the user's behalf, which is usually the destination,
  and names the flags. An unlinked directory with no key says "not linked"
  first, and now opens the picker for a human or exits 2 otherwise. No
  instances to pick from exits 2 too, and when applications can't be listed
  (an accountless app with no login) it asks about the resolved instance.
- import refuses an export run of the instance it would import into.
- The export's next, "Import them with" and runs hints keep --runs-dir, and
  only that: its target flags name the source.
- A failed write leaves no run behind, the summary and --json count skipped
  users, the password warning shows only when someone had one, and an app's
  external_id moving to private_metadata.clerkExternalId is said up front.
- The Supabase export counts names the source splits out of the metadata,
  keeps a ban stored as 'infinity', and says when SUPABASE_DB_URL is set but
  unusable.
- withInputRetry won't re-prompt without a terminal, which forced human
  mode with no TTY used to spin on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…e credential retry

Slice 2 now keeps the check there for import's and undo's consent prompts,
so the retry shares it rather than keeping a copy.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…e linked instance last, and name the export's own file in cleanup

From Michael's re-test of #524, and CodeRabbit on the cleanup hint:

- An unlinked directory opened `clerk link`'s app picker, whose first row
  creates an empty app. It now gets the flat instance list the linked case
  uses; not logged in, it exits 2 naming the flags.
- Only a missing or expired login while listing applications offers the
  resolved instance; a failure after picking another one goes through. The
  prompt says listing needs a login, after the spinner's failure line.
- The linked application's instances come last, marked "(linked: usually
  the destination)", instead of being the preselected first row.
- The cleanup hint reads the export file's path from the export run's own
  record, and names the copy this import read separately when it differs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ts export

The no-users-left branch finished a continued run without
continueWithExport, so a run started by path and continued by export run
ID never recorded the export, and no cleanup line named it. It now links
the run and prints the cleanup lines once the run is complete. The
README's API table loses a duplicate GET /v1/instance row.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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Some comments are outside the diff and can’t be posted inline due to GitHub limitations.

⚠️ Outside diff range comments (1)

🟡 Minor · Link completed imports to the export run before returning. · run.ts:815-823

packages/cli-core/src/commands/migrate/run.ts:815-823
🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

Link completed imports to the export run before returning.

When a completed path-based import is invoked by its export run ID, findResume returns kind: "complete". This branch returns before continueWithExport records fromExport and before cleanupLines runs. The command therefore omits the cleanup instructions for the export file and its external copy, and the completed import record does not identify the export run.

Handle this completed case separately from interrupted and partial continuations: persist fromExport on resume.record, then emit cleanupLines for the completed record.

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Review comment at @packages/cli-core/src/commands/migrate/run.ts around lines
815 - 823:
In the `resume.kind === "complete"` branch, persist the export run ID as
`fromExport` on `resume.record` and emit `cleanupLines` for that completed
record before returning. Keep this handling separate from interrupted and
partial continuation paths.

🤖 Prompt to fix review comments
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.

Outside diff comments:
Review comments at @packages/cli-core/src/commands/migrate/run.ts:
- Around line 815-823: In the `resume.kind === "complete"` branch, persist the
export run ID as `fromExport` on `resume.record` and emit `cleanupLines` for
that completed record before returning. Keep this handling separate from
interrupted and partial continuation paths.

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…xport

An import finished by path, then run again by export run ID, returned
"Already imported" before recording the export, so the cleanup never named
it. The complete branch now records fromExport on the run's own record and
prints the cleanup lines.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@royanger

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@coderabbitai Re the outside-diff comment on run.ts:815-823 (link completed imports to the export run before returning): fixed in 9da0cfa. When findResume returns complete and the import was named by an export run ID that the record doesn't carry yet, the run's own record gets fromExport through patchRun, which touches only run.json, not Clerk. The "Already imported" output then prints the cleanup lines, and --json returns the patched record. Test: a run finished by path, re-run by export run ID, records fromExport and names the export in its cleanup. It fails without the fix.

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail
base=packages/cli-core/src/commands/migrate
ast-grep outline "$base/run.ts" --match 'runMigration|cleanupLines' --view expanded
ast-grep outline "$base/run.test.ts" --match 'export|complete|finished' 
rg -n -C18 'resume\.kind === "complete"|resume\.status === "complete"|Already imported|patchRun' "$base/run.ts"
rg -n -C22 'finished by path|completed.*export|complete.*export|re-run|rerun|already imported|Already imported' "$base/run.test.ts"
rg -n -C10 'function patchRun|const patchRun\s*=' --type ts .

Length of output: 16644


@royanger Thanks. I checked the completed-import branch and the regression test assertions. This finding is addressed.

  • Before returning, the branch calls patchRun when the record needs the fromExport link.
  • The “Already imported” output prints cleanupLines for the updated record.
  • --json returns the updated record.
  • The regression test checks that an import completed by path gains fromExport when invoked by export run ID. It also checks the cleanup message naming the export.

I did not run the tests.

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3 participants