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norns update procedure

update information and bundling

upon entering the SYSTEM > UPDATE menu the update folder ~/update/ is scanned for files matching the norns*.tgz pattern. any attached USB disk has its root folder checked as well. if present the following process happens:

  • file is extracted
  • md5 check
  • if success, extract data to folder
  • cleanup (delete archives and md5)

updates are stored as folders.*

when an update is "executed" via the menu, the application runs update.sh within the selected update's folder and then updates version.txt which is also stored in ~/update.

* there is no reason to keep the update folders, they should be deleted after being run. also, an update's version number should be checked against the current version, to prevent backwards updating (which would likely only break a bunch of functionality).

anatomy of an update .tgz

update versions tracked by date YYMMDD.

ie norns180401.tgz

inside this archive is:

180401.tgz 180401.md5

the md5 validates the tgz. if passed, 180401.tgz is extracted to 180401/.

inside 180401/ is update.sh, version.txt, and the payload.

update.sh copies included files to the correct locations (and does whatever else needs to be done).

version.txt simply contains the version (ie 180401) and is copied to ~/update (which is later read by matron).

files relevant to matron, crone, or maiden should be kept in respective subfolders in the archive.

preparation of an update

generating an update is straightforward. make a YYMMDD folder, put all the files in there with a correct update.sh.

tar czvf YYMMDD.tgz YYMMDD
md5sum YYMMDD.tgz > YYMMDD.md5
tar czvf nornsYYMMDD.tgz YYMMDD.*

delivery

presently update files are copied to ~/update via the SYSTEM > UPDATE menu, which checks the remote github release against the current version.

it's possible to manually install an update by copying the update file to ~/update, extracting it, and running update.sh directly.