forked from lix-project/lix
112ee89501
* A better substitute mechanism. Instead of generating a store expression for each store path for which we have a substitute, we can have a single store expression that builds a generic program that is invoked to build the desired store path, which is passed as an argument. This means that operations like `nix-pull' only produce O(1) files instead of O(N) files in the store when registering N substitutes. (It consumes O(N) database storage, of course, but that's not a performance problem). * Added a test for the substitute mechanism. * `nix-store --substitute' reads the substitutes from standard input, instead of from the command line. This prevents us from running into the kernel's limit on command line length.
23 lines
330 B
Bash
23 lines
330 B
Bash
# Set a PATH (!!! impure).
|
|
export PATH=/bin:/usr/bin:$PATH
|
|
|
|
mkdir $out
|
|
|
|
cat > $out/substituter <<EOF
|
|
#! /bin/sh -ex
|
|
echo \$*
|
|
|
|
case \$* in
|
|
*aaaa*)
|
|
echo "Closure([\"\$2\"],[(\"\$2\",[])])" > \$1
|
|
;;
|
|
*)
|
|
mkdir \$1
|
|
echo \$3 \$4 > \$1/hello
|
|
;;
|
|
esac
|
|
EOF
|
|
|
|
chmod +x $out/substituter
|
|
|