lix-releng-staging/scripts/nix-build.in
Eelco Dolstra 630ae0c9d7 * nix-build: use an indirection scheme to make it easier for users to
get rid of GC roots.  Nix-build places a symlink `result' in the
  current directory.  Previously, removing that symlink would not
  remove the store path being linked to as a GC root.  Now, the GC
  root created by nix-build is actually a symlink in
  `/nix/var/nix/gcroots/auto' to `result'.  So if that symlink is
  removed the GC root automatically becomes invalid (since it can no
  longer be resolved).  The root itself is not automatically removed -
  the garbage collector should delete dangling roots.
2005-02-01 13:48:46 +00:00

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#! @shell@ -e
nixExpr=$1
if test -z "$nixExpr"; then
echo "syntax: $0 NIX-EXPR..." >&2
exit 1
fi
extraArgs=
addDrvLink=0
addOutLink=1
trap 'rm -f ./.nix-build-tmp-*' EXIT
# Process the arguments.
for i in "$@"; do
case "$i" in
--add-drv-link)
addDrvLink=1
;;
--no-link)
addOutLink=0
;;
-*)
extraArgs="$extraArgs $i"
;;
*)
# Instantiate the Nix expression.
prefix=
if test "$addDrvLink" = 0; then prefix=.nix-build-tmp-; fi
storeExprs=$(@bindir@/nix-instantiate \
--add-root ./${prefix}derivation --indirect \
"$i")
for j in $storeExprs; do
echo "store expression is $j $(readlink "$j")" >&2
done
# Build the resulting store derivation.
prefix=
if test "$addOutLink" = 0; then prefix=.nix-build-tmp-; fi
outPaths=$(@bindir@/nix-store \
--add-root ./${prefix}result --indirect \
-rv $extraArgs $storeExprs)
for j in $outPaths; do
echo "$j $(readlink "$j")"
done
;;
esac
done