This doesn't actually update the kernel, just the linux-libre
deblobbing scripts, but it should mean that automatic updaters keep
the deblobbing scripts up to date. So even if deblobbing scripts for
a new kernel version are not available immediately after release, they
should be updated automatically soon enough once available.
update-libre.sh doesn't commit by default so that it can be used as an
updateScript, where I don't think auto-committing is the norm.
The generated commit messages say "linux-libre_latest" rather than
"linux-libre", because even though linux-libre will also be rebuilt,
it's linux-libre_latest that is more likely to need it.
Build was failing because we were depending on tagged versions of
the deblobbing scripts. The tags are not updated and thus newer
changes required won't be reflected unless the tag is re-created, which
might not be reliably the case.
So bumping revision and switching to use the branches to access the
deblob scripts.
For context, in our case the missing change is:
--- /nix/store/sfc0rrhj5l44zpqgpsymq5750k5wzg8p-tags-r16790/4.19-gnu/deblob-4.19 1970-01-01 01:00:01.000000000 +0100
+++ ../deblob-4.19 2019-09-14 14:53:44.637404289 +0200
@@ -1879,7 +1879,11 @@
announce BRCMFMAC - "Broadcom IEEE802.11n embedded FullMAC WLAN driver"
reject_firmware drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
-reject_firmware drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
+if grep -q firmware_request_nowarn drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c; then
+ reject_firmware_nowarn drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
+else
+ reject_firmware drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
+fi
clean_blob drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
clean_blob drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
