#625 swamp update --setup-auto does not work with bluefin44 (crontab not found, should

Description

Tried to setup setup-auto for self updating swamp according to docs https://swamp-club.com/manual/how-to/set-up-background-autoupdating .

It failed like this:

12:58:10.919 fatal error { NotFound: Failed to spawn 'crontab': entity not found at spawnInner (ext:deno_process/40_process.js:638:17) at Command.output (ext:deno_process/40_process.js:790:12) at readCrontab (file:///tmp/deno-compile-swamp/src/infrastructure/update/cron_scheduler.ts:67:28) at detectInstalledCronMode (file:///tmp/deno-compile-swamp/src/infrastructure/update/cron_scheduler.ts:212:29) at async detectInstalledLinuxMode (file:///tmp/deno-compile-swamp/src/infrastructure/update/scheduler_factory.ts:115:10) at async detectInstalledMode (file:///tmp/deno-compile-swamp/src/infrastructure/update/scheduler_factory.ts:105:14) at async resolveLaunchdMode (file:///tmp/deno-compile-swamp/src/infrastructure/update/scheduler_factory.ts:74:21) at async runSetupAuto (file:///tmp/deno-compile-swamp/src/cli/commands/update.ts:217:23) at async Command. (file:///tmp/deno-compile-swamp/src/cli/commands/update.ts:426:9) at async Command.execute (https://jsr.io/@cliffy/command/1.0.1/command.ts:2307:7) code: "ENOENT" }

Steps to Reproduce

1. Have a far too restrictive distro (optional)
2. Cry a bit (optional)
3. Go in a corner (optional)
4. Install swamp
5. Run swamp update --setup-auto on such distro

Environment

• swamp version: 20260610.225536.0-sha.4559c368
• OS:

NAME="Bluefin" VERSION="44.20260527.1 (Silverblue)" RELEASE_TYPE=stable ID=bluefin ID_LIKE="fedora" VERSION_ID=44 VERSION_CODENAME="Deinonychus" PRETTY_NAME="Bluefin (Version: 44.20260527.1)" ANSI_COLOR="0;38;2;60;110;180" LOGO=fedora-logo-icon CPE_NAME="cpe:/o:universal-blue:bluefin:44" DEFAULT_HOSTNAME="bluefin" HOME_URL="https://projectbluefin.io" DOCUMENTATION_URL="https://docs.projectbluefin.io" SUPPORT_URL="https://github.com/ublue-os/bluefin/issues/" BUG_REPORT_URL="https://github.com/ublue-os/bluefin/issues/" SUPPORT_END=2027-05-19 VARIANT="Silverblue" VARIANT_ID=bluefin-dx OSTREE_VERSION='44.20260527.1' BUILD_ID="42c737e" IMAGE_ID="bluefin-dx" IMAGE_VERSION="44.20260527.1"

• Shell: bash

Additional Context