56 lines
2.7 KiB
Bash
56 lines
2.7 KiB
Bash
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#!/usr/bin/env bash
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# pacman: bare meson takes its libdir from the Debian host.
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#
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# The build host is Ubuntu, so meson's default_libdir() asks
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# dpkg-architecture for the multiarch tuple and hands back
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#
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# lib/s390x-linux-gnu
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#
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# devtools' arch-meson would override that, but this PKGBUILD calls BARE
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# `meson`, so nothing does. The build then succeeds, makepkg exits 0, and the
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# package ships
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#
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# usr/lib/s390x-linux-gnu/libalpm.so.16
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#
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# where Arch's ld.so never looks -- it reads /usr/lib. libalpm is pacman's
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# OWN library, so a target installed from this package has a package manager
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# that cannot start, and no way to pacman -U the fix. Nothing in the build log
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# says a word about it. This is the single most expensive instance of the
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# libdir slip in the port, which is why it gets its own hook rather than
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# waiting for the arch-meson stand-in to cover it.
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#
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# The same slip poisons two things downstream of the library file:
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# - .../pkgconfig/libalpm.pc, whose `libdir=${prefix}/lib/s390x-linux-gnu`
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# then aims every consumer at the same dead directory;
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# - makepkg's own autodep. /etc/makepkg.conf sets
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# LIB_DIRS=('lib:usr/lib' 'lib32:usr/lib32') and library_provides.sh runs
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# `find "$pkgdir/$dir" -maxdepth 1`, so it never descends into the
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# multiarch directory. .PKGINFO recorded a bare `provides = libalpm.so`
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# with no version, where it should read libalpm.so=16-64 -- so every
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# `libalpm.so=16-64` dependency in the port would go unsatisfiable, and
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# the error would name the package that wanted it, never pacman.
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#
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# Only the configure call takes a libdir. The other four `meson` words in the
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# file -- makedepends, compile, test, install -- take none and are left alone.
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# The count is asserted rather than assumed.
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#
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# libdir only. sbindir and libexecdir also keep non-Arch defaults here, but
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# pacman installs nothing into either -- the manifest is /usr/{bin,include,
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# lib,share} and /etc, nothing else. Setting them would be a change with no
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# artefact behind it, and if upstream ever does add an sbin binary we want to
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# see it rather than have it silently absorbed.
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set -euo pipefail
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python3 - <<'PY'
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import io
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s = io.open("PKGBUILD", encoding="utf-8").read()
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old = " meson --prefix=/usr \\\n"
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n = s.count(old)
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assert n == 1, "pacman: expected 1 meson configure call, found %d" % n
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assert "libdir" not in s, "pacman: PKGBUILD already sets a libdir, re-read it"
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s = s.replace(old, old + " --libdir=lib \\\n", 1)
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io.open("PKGBUILD", "w", encoding="utf-8").write(s)
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PY
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[ "$(grep -c -- '--libdir=lib' PKGBUILD)" = 1 ] || {
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echo "pacman: libdir not forced to lib exactly once" >&2; exit 1; }
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echo "pacman: libdir forced to /usr/lib (Debian host defaults it to multiarch)"
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