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-rw-r--r--corepkgs/channels/Makefile.am11
-rw-r--r--corepkgs/channels/unpack.nix7
-rw-r--r--corepkgs/channels/unpack.sh.in24
3 files changed, 42 insertions, 0 deletions
diff --git a/corepkgs/channels/Makefile.am b/corepkgs/channels/Makefile.am
new file mode 100644
index 000000000000..1bf73f7f4cb8
--- /dev/null
+++ b/corepkgs/channels/Makefile.am
@@ -0,0 +1,11 @@
+all-local: unpack.sh
+
+install-exec-local:
+	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs
+	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs/channels
+	$(INSTALL_DATA) unpack.nix $(DESTDIR)$(datadir)/nix/corepkgs/channels
+	$(INSTALL_PROGRAM) unpack.sh $(DESTDIR)$(datadir)/nix/corepkgs/channels
+
+include ../../substitute.mk
+
+EXTRA_DIST = default.nix unpack.sh.in
diff --git a/corepkgs/channels/unpack.nix b/corepkgs/channels/unpack.nix
new file mode 100644
index 000000000000..80ca4a371034
--- /dev/null
+++ b/corepkgs/channels/unpack.nix
@@ -0,0 +1,7 @@
+{system, inputs}:
+
+derivation {
+  name = "channels";
+  builder = ./unpack.sh;
+  inherit system inputs;
+}
\ No newline at end of file
diff --git a/corepkgs/channels/unpack.sh.in b/corepkgs/channels/unpack.sh.in
new file mode 100644
index 000000000000..f349f3da3862
--- /dev/null
+++ b/corepkgs/channels/unpack.sh.in
@@ -0,0 +1,24 @@
+#! @shell@ -e
+
+export PATH=/bin:/usr/bin # !!! impure
+
+mkdir $out
+mkdir $out/tmp
+cd $out/tmp
+
+expr=$out/default.nix
+echo '[' > $expr
+
+nr=0
+for i in $inputs; do
+    echo "unpacking $i"
+    @bunzip2@ < $i | tar xvf -
+    mv * ../$nr # !!! hacky
+    echo "(import ./$nr)" >> $expr
+    nr=$(($nr + 1))
+done
+
+echo ']' >> $expr
+
+cd ..
+rmdir tmp
\ No newline at end of file