forked from lei.chen/myxce
Rongsong Shen
db2b5f17f0
Both meson-build.sh (venv creation) and meson-install.sh (wrapper
shebang) resolved python3 independently at run time (bare `python3 -m
venv` / `command -v python3`) -- correct as long as invoked inside
nix develop/build, but nothing prevented a stray non-nix system
python3 earlier on PATH from shadowing it.
meson.build now resolves python3 once via import('python').
find_installation('python3') -- same mechanism as find_program('go')/
capnp/packcc elsewhere in this build, printed at `meson setup` time
as "Program python3 found: YES (/nix/store/...)" -- and threads that
exact resolved path into both scripts as an explicit argument instead
of a fresh lookup.
Verified: meson setup prints the pinned python3, xceadmin target
rebuilds clean (165/165 passed), and the built venv's own python3
resolves through to that exact nix store path.
44 lines
2 KiB
Bash
Executable file
44 lines
2 KiB
Bash
Executable file
#!/usr/bin/env bash
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# meson install-time script (meson.add_install_script) -- runs after the
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# xceadmin custom_target (build_by_default) has already installed+tested
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# into its own build-dir venv (meson-build.sh). This script does NOT copy
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# that venv wholesale: pip's generated console_scripts wrapper hardcodes
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# the *build-directory* absolute path in its shebang, which stops existing
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# once the build dir is cleaned up -- copying it verbatim into $out would
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# ship a binary with a shebang pointing at nowhere.
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#
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# Instead: copy just the xceadmin/xcecommon package dirs (pure files, no
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# shebang) into $out, and hand-write a wrapper whose shebang and PYTHONPATH
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# are resolved against *this* install script's own environment (python3 --
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# passed in as $1, meson's own resolved interpreter (import('python').
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# find_installation()) from meson.build, not a fresh `command -v python3`
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# lookup here -- and the nix-provided pycapnp/pyyaml/jsonschema/click
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# site-packages come from nativeBuildInputs, same as every other phase of
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# this derivation) -- every path baked in below is a real /nix/store path,
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# so nix's reference scanner picks each one up as a proper runtime
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# dependency of $out.
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set -euo pipefail
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PYTHON="$1"
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DESTDIR_PREFIX="$MESON_INSTALL_DESTDIR_PREFIX"
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VENV_SITE_GLOB=("$MESON_BUILD_ROOT"/xceadmin/.venv/lib/python3.*/site-packages)
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VENV_SITE="${VENV_SITE_GLOB[0]}"
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if [ ! -d "$VENV_SITE/xceadmin" ]; then
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echo "meson-install.sh: expected $VENV_SITE/xceadmin from the xceadmin build step, not found" >&2
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exit 1
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fi
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SITE_DIR="$DESTDIR_PREFIX/lib/xceadmin-site"
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mkdir -p "$SITE_DIR" "$DESTDIR_PREFIX/bin"
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rm -rf "$SITE_DIR/xceadmin" "$SITE_DIR/xcecommon"
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cp -r "$VENV_SITE/xceadmin" "$VENV_SITE/xcecommon" "$SITE_DIR/"
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cat > "$DESTDIR_PREFIX/bin/xceadmin" <<WRAPPER
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#!/usr/bin/env bash
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export PYTHONPATH="$SITE_DIR:${PYTHONPATH:-}"
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exec "$PYTHON" -m xceadmin.cli "\$@"
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WRAPPER
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chmod +x "$DESTDIR_PREFIX/bin/xceadmin"
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echo "=== xceadmin (meson install): wrapper installed at $DESTDIR_PREFIX/bin/xceadmin ==="
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