8bc5104a6e
When specifying the `builder` attribute in `stdenv.mkDerivation`, this
will be effectively transformed into
builtins.derivation {
builder = stdenv.shell;
args = [ "-e" builder ];
}
This also means that `default-builder.sh` is never sourced and as a
result it's not guaranteed that `$NIX_ATTRS_SH_FILE` is set to a correct
location[1].
Also, we need to source `.attrs.sh` to source `$stdenv`. So, the
following is done now:
* If `$NIX_ATTRS_SH_FILE` points to a correct location, then use it.
Directly using `.attrs.sh` is problematic for `nix-shell(1)` usage
(see previous commit for more context), so prefer the environment
variable if possible.
* Otherwise, if `.attrs.sh` exists, then use it. See [1] for when this
can happen.
* If neither applies, it can be assumed that `__structuredAttrs` is
turned off and thus nothing needs to be done.
[1] It's possible that it doesn't exist at all - in case of Nix 2.3 or
it can point to a wrong location on older Nix versions with a bug in
`__structuredAttrs`.
49 lines
1.3 KiB
Bash
49 lines
1.3 KiB
Bash
if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
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source $stdenv/setup
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# Wrap the given `aclocal' program, appending extra `-I' flags
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# corresponding to the directories listed in $ACLOCAL_PATH. (Note
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# that `wrapProgram' can't be used for that purpose since it can only
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# prepend flags, not append them.)
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wrapAclocal() {
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local program="$1"
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local wrapped="$(dirname $program)/.$(basename $program)-wrapped"
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mv "$program" "$wrapped"
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cat > "$program"<<EOF
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#! $SHELL -e
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unset extraFlagsArray
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declare -a extraFlagsArray
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oldIFS=\$IFS
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IFS=:
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for dir in \$ACLOCAL_PATH; do
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if test -n "\$dir" -a -d "\$dir"; then
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extraFlagsArray=("\${extraFlagsArray[@]}" "-I" "\$dir")
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fi
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done
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IFS=\$oldIFS
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exec "$wrapped" "\$@" "\${extraFlagsArray[@]}"
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EOF
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chmod +x "$program"
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}
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postInstall() {
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# Create a wrapper around `aclocal' that converts every element in
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# `ACLOCAL_PATH' into a `-I dir' option. This way `aclocal'
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# becomes modular; M4 macros do not need to be stored in a single
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# global directory, while callers of `aclocal' do not need to pass
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# `-I' options explicitly.
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for prog in $out/bin/aclocal*; do
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wrapAclocal "$prog"
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done
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ln -s aclocal-1.11 $out/share/aclocal
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ln -s automake-1.11 $out/share/automake
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}
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genericBuild
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