forked from lix-project/lix
51 lines
2.4 KiB
Bash
51 lines
2.4 KiB
Bash
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#!/usr/bin/env bash
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# Meson will call this with an absolute path to Bash.
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# The shebang is just for convenience.
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# The parser and lexer tab are generated via custom Meson targets in src/libexpr/meson.build,
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# but Meson doesn't support marking only part of a target for install. The generation creates
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# both headers (parser-tab.hh, lexer-tab.hh) and source files (parser-tab.cc, lexer-tab.cc),
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# and we definitely want the former installed, but not the latter. This script is added to
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# Meson's install steps to correct this, as the logic for it is just complex enough to
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# warrant separate and careful handling, because both Meson's configured include directory
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# may or may not be an absolute path, and DESTDIR may or may not be set at all, but can't be
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# manipulated in Meson logic.
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set -euo pipefail
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echo "cleanup-install: removing Meson-placed C++ sources from dest includedir"
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if [[ "${1/--help/}" != "$1" ]]; then
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echo "cleanup-install: this script should only be called from the Meson build system"
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exit 1
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fi
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# Ensure the includedir was passed as the first argument
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# (set -u will make this fail otherwise).
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includedir="$1"
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# And then ensure that first argument is a directory that exists.
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if ! [[ -d "$1" ]]; then
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echo "cleanup-install: this script should only be called from the Meson build system"
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echo "argv[1] (${1@Q}) is not a directory"
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exit 2
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fi
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# If DESTDIR environment variable is set, prepend it to the include dir.
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# Unfortunately, we cannot do this on the Meson side. We do have an environment variable
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# `MESON_INSTALL_DESTDIR_PREFIX`, but that will not refer to the include directory if
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# includedir has been set separately, which Lix's split-output derivation does.
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# We also cannot simply do an inline bash conditional like "${DESTDIR:=}" or similar,
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# because we need to specifically *join* DESTDIR and includedir with a slash, and *not*
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# have a slash if DESTDIR isn't set at all, since $includedir could be a relative directory.
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# Finally, DESTDIR is only available to us as an environment variable in these install scripts,
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# not in Meson logic.
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# Therefore, our best option is to have Meson pass this script the configured includedir,
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# and perform this dance with it and $DESTDIR.
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if [[ -n "${DESTDIR:-}" ]]; then
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includedir="$DESTDIR/$includedir"
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fi
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# Intentionally not using -f.
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# If these files don't exist then our assumptions have been violated and we should fail.
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rm -v "$includedir/nix/parser-tab.cc" "$includedir/nix/lexer-tab.cc"
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