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 `$NIX_ATTRS_SH_FILE` points to a correct location, then use it.
Directly using `.attrs.sh` is problematic for `nix-shell(1)` usage
(see previous commit for more context), so prefer the environment
variable if possible.
* Otherwise, if `.attrs.sh` exists, then use it. See [1] for when this
can happen.
* If neither applies, it can be assumed that `__structuredAttrs` is
turned off and thus nothing needs to be done.
[1] It's possible that it doesn't exist at all - in case of Nix 2.3 or
it can point to a wrong location on older Nix versions with a bug in
`__structuredAttrs`.
46 lines
1.2 KiB
Bash
46 lines
1.2 KiB
Bash
if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
|
|
source $stdenv/setup
|
|
|
|
set -x
|
|
|
|
if ! [ -f "$cacheDB" ]; then
|
|
echo "Creating cache DB $cacheDB"
|
|
mtn --db "$cacheDB" db init
|
|
fi
|
|
|
|
echo "getting revision $selector";
|
|
|
|
done=;
|
|
for source in $dbs; do
|
|
if mtn pull --db "$cacheDB" "$source" "${branch}"; then
|
|
revision="$(mtn --db "$cacheDB" au toposort $(mtn --db "$cacheDB" au select "$selector") | tail -1)";
|
|
if [ -n "$revision" ]; then
|
|
if mtn --db "$cacheDB" au get_revision "$revision"; then
|
|
echo "found revision $revision"
|
|
done=1;
|
|
else
|
|
echo "revision $revision does not exist";
|
|
fi
|
|
else
|
|
echo "selector $selector does not match any revision";
|
|
fi
|
|
else
|
|
echo "pulling branch $branch wasn't successful";
|
|
fi;
|
|
if test -n "$done"; then
|
|
break;
|
|
fi;
|
|
done;
|
|
|
|
echo "checking out the revision $revision";
|
|
|
|
if test -n "$done"; then
|
|
mtn checkout --db "$cacheDB" -r "$revision" "$out" -b "${branch}"
|
|
else
|
|
echo "Needed revision still not found. Exiting";
|
|
exit 1;
|
|
fi;
|
|
|
|
echo "clearing _MTN in the output"
|
|
|
|
rm -rf "$out/_MTN"
|