From 3093af58a7e9d3f0315a1a1040d3cfeaea051ba6 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 22 Jun 2004 15:12:34 +0000
Subject: [PATCH] * A utility script `nix-build' that builds Nix expressions
 and prints   their output paths (and only that) on standard output.

---
 scripts/Makefile.am  | 13 +++++++------
 scripts/nix-build.in | 23 +++++++++++++++++++++++
 2 files changed, 30 insertions(+), 6 deletions(-)
 create mode 100755 scripts/nix-build.in

diff --git a/scripts/Makefile.am b/scripts/Makefile.am
index 7e429aabe8..d4fa169bd2 100644
--- a/scripts/Makefile.am
+++ b/scripts/Makefile.am
@@ -1,6 +1,6 @@
 bin_SCRIPTS = nix-collect-garbage \
- nix-pull nix-push nix-prefetch-url \
- nix-install-package nix-channel
+  nix-pull nix-push nix-prefetch-url \
+  nix-install-package nix-channel nix-build
 
 noinst_SCRIPTS = nix-profile.sh
 
@@ -18,7 +18,8 @@ install-exec-local: readmanifest.pm
 include ../substitute.mk
 
 EXTRA_DIST = nix-collect-garbage.in \
- nix-pull.in nix-push.in nix-profile.sh.in \
- nix-prefetch-url.in nix-install-package.in \
- nix-channel.in \
- prebuilts.conf readmanifest.pm.in
+  nix-pull.in nix-push.in nix-profile.sh.in \
+  nix-prefetch-url.in nix-install-package.in \
+  nix-channel.in \
+  prebuilts.conf readmanifest.pm.in \
+  nix-build.in
diff --git a/scripts/nix-build.in b/scripts/nix-build.in
new file mode 100755
index 0000000000..a50901135e
--- /dev/null
+++ b/scripts/nix-build.in
@@ -0,0 +1,23 @@
+#! @shell@ -e
+
+nixExpr=$1
+
+if test -z "$nixExpr"; then
+    echo "syntax: $0 NIX-EXPR..." >&2
+    exit 1
+fi
+
+extraArgs=
+
+for i in "$@"; do
+    case "$i" in
+        -*)
+            extraArgs="$extraArgs $i"
+            ;;
+        *)
+            storeExpr=$(nix-instantiate "$i")
+            echo "store expression is $storeExpr" >&2
+            nix-store -qnfv $extraArgs $storeExpr
+            ;;
+    esac
+done