#!/usr/bin/env bash

source common.sh

drv=$(nix-instantiate ./content-addressed.nix -A rootCA --arg seed 1)^out
nix derivation show "$drv" --arg seed 1

buildAttr () {
    local derivationPath=$1
    local seedValue=$2
    shift; shift
    local args=("./content-addressed.nix" "-A" "$derivationPath" --arg seed "$seedValue" "--no-out-link")
    args+=("$@")
    nix-build "${args[@]}"
}

testDeterministicCA () {
    [[ $(buildAttr rootCA 1) = $(buildAttr rootCA 2) ]]
}

testCutoffFor () {
    local out1 out2
    out1=$(buildAttr $1 1)
    # The seed only changes the root derivation, and not it's output, so the
    # dependent derivations should only need to be built once.
    buildAttr rootCA 2
    out2=$(buildAttr $1 2 -j0)
    test "$out1" == "$out2"
}

testCutoff () {
    # Don't directly build dependentCA, that way we'll make sure we don't rely on
    # dependent derivations always being already built.
    #testDerivation dependentCA
    testCutoffFor transitivelyDependentCA
    testCutoffFor dependentNonCA
    testCutoffFor dependentFixedOutput
}

testGC () {
    nix-instantiate ./content-addressed.nix -A rootCA --arg seed 5
    nix-collect-garbage --option keep-derivations true
    clearStore
    buildAttr rootCA 1 --out-link $TEST_ROOT/rootCA
    nix-collect-garbage
    buildAttr rootCA 1 -j0
}

testNixCommand () {
    clearStore
    nix build --file ./content-addressed.nix --no-link
}

# Regression test for https://github.com/NixOS/nix/issues/4775
testNormalization () {
    clearStore
    outPath=$(buildAttr rootCA 1)
    test "$(stat -c %Y $outPath)" -eq 1
}

clearStore
testNormalization
testDeterministicCA
clearStore
testCutoff
testGC
testNixCommand