initial commit

flake.nix

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+{
+    inputs = {
+        nixpkgs.url = "github:NixOS/nixpkgs";
+        flake-utils.url = "github:numtide/flake-utils";
+        openhab-distro = {
+            url = "github:openhab/openhab-distro";
+            flake = false;
+        };
+    };
+
+    outputs = { flake-utils, nixpkgs, openhab-distro, ... }: flake-utils.lib.eachDefaultSystem (system: {
+        packages = rec {
+            jdk-openhab = nixpkgs.legacyPackages.${system}.jdk11;
+            maven-openhab = nixpkgs.legacyPackages.${system}.maven.override { jdk = jdk-openhab; };
+            openhab-repository = nixpkgs.legacyPackages.${system}.callPackage ./openhab-repository.nix {
+                inherit openhab-distro;
+                maven = maven-openhab;
+            };
+            openhab = nixpkgs.legacyPackages.${system}.callPackage ./openhab.nix {
+                inherit openhab-distro openhab-repository jdk-openhab;
+                maven = maven-openhab;
+            };
+            default = openhab;
+        };
+    });
+}

openhab-repository.nix

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+# Downloads various dependencies for the openhab build.
+{ lib, stdenv, maven, openhab-distro }:
+stdenv.mkDerivation {
+    pname = "openhab-repository";
+    version = openhab-distro.shortRev;
+    nativeBuildInputs = [ maven ];
+    src = openhab-distro;
+
+    buildPhase = ''
+        mvn -B -T 128 -Drelease -Dmaven.repo.local="$out" package
+    '';
+
+    installPhase = ''
+        # Delete all ephemeral files with lastModified timestamps inside
+        find "$out" -type f '(' \
+            -name '*.lastUpdated' -or \
+            -name 'resolver-status.properties' -or \
+            -name '_remote.repositories' ')' -delete
+    '';
+
+    dontFixup = true;
+    outputHashAlgo = "sha256";
+    outputHashMode = "recursive";
+    outputHash = builtins.readFile ./openhab-repository.sha256;
+}

openhab-repository.sha256

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+sha256-po8EjHV8lPUOxkuOnZ5mQOODg+LAhgazfx7wW6Modqc=

openhab.nix

@@ -0,0 +1,71 @@
+{
+ gawk,
+ bash,
+ coreutils,
+ jdk-openhab,
+ makeWrapper,
+ lib,
+ maven,
+ openhab-distro,
+ openhab-repository,
+ stdenv,
+}:
+
+stdenv.mkDerivation rec {
+    pname = "openhab";
+    version = openhab-distro.shortRev;
+    src = openhab-distro;
+    nativeBuildInputs = [ makeWrapper maven ];
+    buildInputs = [ bash ];
+    outputs = [ "out" "demo" ];
+    extraPath = lib.makeBinPath [ jdk-openhab gawk coreutils ];
+    wrappedExecutables = [
+        "start.sh"
+        "start_debug.sh"
+        "runtime/bin/karaf"
+        "runtime/bin/backup"
+        "runtime/bin/client"
+        "runtime/bin/instance"
+        "runtime/bin/karaf"
+        "runtime/bin/restore"
+        "runtime/bin/shell"
+        "runtime/bin/start"
+        "runtime/bin/status"
+        "runtime/bin/stop"
+        "runtime/bin/update"
+    ];
+
+    buildPhase = ''
+        runHook preBuild
+
+        echo "Using repository ${openhab-repository}"
+        cp -r ${openhab-repository} ./repository
+        chmod -R +rw ./repository
+        mvn --offline -B -T $NIX_BUILD_CORES -Drelease -Dmaven.repo.local=./repository package
+
+        runHook postBuild
+    '';
+
+    installPhase = ''
+        runHook preInstall
+        mkdir $out
+        tar -C $out -xf distributions/openhab/target/openhab-3.4.2.tar.gz
+        mv distributions/openhab-addons/target/openhab-addons-3.4.2.kar $out/addons/
+        mkdir $demo
+        tar -C $demo -xf distributions/openhab-demo/target/openhab-demo-3.4.2.tar.gz
+
+        rm -rfv \
+            "$out/"*.bat \
+            "$out/runtime/bin/"*.bat \
+            "$out/runtime/bin/"*.ps1 \
+            "$out/runtime/bin/"*.psm1 \
+            "$out/runtime/bin/"*.lst
+
+        for exe in $wrappedExecutables; do
+            echo "Wrapping $exe…"
+            wrapProgram $out/$exe --prefix PATH ':' $extraPath
+        done
+
+        runHook postInstall
+    '';
+}