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feat(admin-config-tool): install standalone xceadmin binary via meson

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xceadmin's custom_target only built+tested (stamp-file output, no
install:true) — nix build .#xcecore succeeded but shipped nothing in
result/bin, unlike every other component.

Add meson.add_install_script('meson-install.sh'): copies the
xceadmin/xcecommon package dirs (not the whole build-dir venv, whose
pip-generated shebang hardcodes a build path that stops existing after
the build) into $out/lib/xceadmin-site, then writes a wrapper at
$out/bin/xceadmin whose shebang and PYTHONPATH are resolved against
the install script's own nix build environment — real /nix/store
paths for python3 and each dependency (pycapnp, pyyaml, jsonschema,
click), so nix's reference scanner keeps them alive in the closure.
No venv activation needed at runtime.

Verified: meson install --destdir and nix build --option sandbox
false .#xcecore both produce a working result/bin/xceadmin, runnable
standalone with a stripped-down PATH-only environment.
This commit is contained in:
Rongsong Shen 2026-07-22 11:10:40 +00:00
parent e4fd9e1d3f
commit 893a01db7b
2 changed files with 47 additions and 0 deletions
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6
src/xceadmin/meson.build
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@ -32,3 +32,9 @@ xceadmin_stamp = custom_target('xceadmin',
build_always_stale: true,
console: true,
)
# Installs a standalone $out/bin/xceadmin -- runs after xceadmin_stamp
# (ninja install always depends on build_by_default targets first) so the
# build-dir venv it copies from already exists. See meson-install.sh for
# why this isn't a plain `cp` of that venv.
meson.add_install_script('meson-install.sh')