The APK has been debug-signed with a key generated on the spot, which is
right for putting a build on a test device and useless for anything else:
a different signature every run, so nothing can ever update in place.
Four secrets now select a real signature -- ANDROID_KEYSTORE_BASE64 and
its password, alias and key password. The names are JellyTau's, because
that repo already signs its Android build this way against this same
runner and one convention across both is one thing to remember.
Absence of the secrets is not an error. A fork or a branch build has no
access to them and should still produce an installable APK, so the debug
path stays exactly as it was. The reverse is an error: if a keystore is
supplied and cannot be read, the build fails rather than quietly falling
back to a debug key, because a release that is silently debug-signed is
worse than no release.
Passwords reach apksigner and keytool as `env:`, never `pass:`. `pass:`
puts the password in the process table for anything on the box to read.
The keystore is written to a 0700 mktemp directory and never into the
workspace, which is both what actions/cache saves and what the upload
step globs.
Also: upload-artifact drops from v4 to v3. v4 was a guess about what this
Gitea supports. v3 is what JellyTau uploads its APK with on this runner
today, which makes it the version known to work rather than the one that
ought to.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
package.sh does two things: it decides how the host reaches the image, and
it assembles an APK once inside it. Only the first half is host-specific.
CI already runs in that image, so the second half was about to be copied
into a workflow step -- two copies of aapt2/zipalign/apksigner ordering,
drifting apart at whatever rate the toolchain moves.
So it moves to docker/android/assemble-apk.sh, which assumes it is inside
the image and takes its paths from the environment, because the callers
disagree about them: the container mounts the repo at /work, the runner
checks it out wherever it likes. Every default reproduces what package.sh
did, so the host path is unchanged.
Two things stop being hard-coded on the way. The build-tools version and
the compile SDK are resolved from what is installed rather than written
out as 36.0.0 and android-36 -- the versions are Dockerfile ARGs, and a
second copy is a second thing to miss when they move. --min-sdk-version
now comes from that same ARG instead of a literal 28, which is the number
the API-level check in CI already reads.
The intermediates are removed at the end. They were harmless in a cache
directory nobody looks at; beside a published artefact they are four more
files for a glob to pick up by mistake.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>