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Download the uv build the Pi can actually run

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Raspberry Pi OS ships a 64-bit kernel with a 32-bit userland, so uname -m - and
therefore ansible_architecture - reports aarch64 on a box whose /bin/ls is
ELF32 ARM and which has no /lib/ld-linux-aarch64.so.1. The aarch64 uv tarball
unpacked happily and then failed three tasks later with

    /usr/local/bin/uv: No such file or directory

which is the dynamic loader missing, not the file, and points at entirely the
wrong thing. Pick the target triple from ansible_userspace_bits instead, which
is the fact that tells the truth, and key the install directory on the triple as
well as the version - otherwise `creates:` would keep a wrong-architecture
binary in place forever. Then run `uv --version` right after installing it, so a
bad download fails where the cause is visible.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Martin Bauer
2026-09-19 19:59:43 +02:00
parent 3557fe3f2b
commit 331df52f0b
2 changed files with 26 additions and 5 deletions
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15
roles/pi_musicmouse/defaults/main.yml
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@@ -8,6 +8,21 @@ pi_musicmouse_repo: "ssh://git@git.bauer.tech:2222/martin/musicmouse.git"
pi_musicmouse_python_version: "3.13"
pi_musicmouse_uv_version: "0.12.10"
# Which uv build to download. Raspberry Pi OS ships a 64-bit kernel with a 32-bit
# userland, so `uname -m` (and therefore ansible_architecture) says aarch64 on a box
# that can only run armhf binaries - the aarch64 build installs fine and then fails to
# exec with "No such file or directory", which is the dynamic loader missing, not the
# file. ansible_userspace_bits is the fact that tells the truth.
pi_musicmouse_uv_target: >-
{{ 'armv7-unknown-linux-gnueabihf'
if (ansible_architecture in ['aarch64', 'armv7l', 'armv6l'] and ansible_userspace_bits == '32')
else _pi_musicmouse_uv_targets[ansible_architecture] }}
_pi_musicmouse_uv_targets:
aarch64: aarch64-unknown-linux-gnu
armv7l: armv7-unknown-linux-gnueabihf
armv6l: armv7-unknown-linux-gnueabihf
x86_64: x86_64-unknown-linux-gnu
# Where to check out the repo on the *control machine* to build the frontend (npm isn't
# installed on the Pi - see README). Keyed by version so different hosts on different
# versions don't clobber each other's build.