Implement Nix Flake (#424)

* Implement flake

flake.lock

@@ -0,0 +1,41 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1631561581,
+        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1632470817,
+        "narHash": "sha256-tGyOesdpqQEVqlmVeElsC98OJ2GDy+LNaCThSby/GQM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "39e8ec2db68b863543bd377e44fbe02f8d05864e",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,211 @@
+{
+  description = "Transfer.sh";
+
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+    let
+      transfer-sh = pkgs: pkgs.buildGoModule {
+        src = self;
+        name = "transfer.sh";
+        vendorSha256 = "sha256-bgQUMiC33yVorcKOWhegT1/YU+fvxsz2pkeRvjf3R7g=";
+      };
+    in
+
+      flake-utils.lib.eachDefaultSystem (
+        system:
+          let
+            pkgs = nixpkgs.legacyPackages.${system};
+          in
+            rec {
+              packages = flake-utils.lib.flattenTree {
+                transfer-sh = transfer-sh pkgs;
+              };
+              defaultPackage = packages.transfer-sh;
+              apps.transfer-sh = flake-utils.lib.mkApp { drv = packages.transfer-sh; };
+              defaultApp = apps.transfer-sh;
+            }
+      ) // rec {
+
+        nixosModules = {
+          transfer-sh = { config, lib, pkgs, ... }: with lib; let
+            RUNTIME_DIR = "/var/lib/transfer.sh";
+            cfg = config.services.transfer-sh;
+
+            general_options = {
+
+              enable = mkEnableOption "Transfer.sh service";
+              listener = mkOption { default = 80; type = types.int; description = "port to use for http (:80)"; };
+              profile-listener = mkOption { default = 6060; type = types.int; description = "port to use for profiler (:6060)"; };
+              force-https = mkOption { type = types.nullOr types.bool; description = "redirect to https"; };
+              tls-listener = mkOption { default = 443; type = types.int; description = "port to use for https (:443)"; };
+              tls-listener-only = mkOption { type = types.nullOr types.bool; description = "flag to enable tls listener only"; };
+              tls-cert-file = mkOption { type = types.nullOr types.str; description = "path to tls certificate"; };
+              tls-private-key = mkOption { type = types.nullOr types.str; description = "path to tls private key "; };
+              http-auth-user = mkOption { type = types.nullOr types.str; description = "user for basic http auth on upload"; };
+              http-auth-pass = mkOption { type = types.nullOr types.str; description = "pass for basic http auth on upload"; };
+              ip-whitelist = mkOption { type = types.nullOr types.str; description = "comma separated list of ips allowed to connect to the service"; };
+              ip-blacklist = mkOption { type = types.nullOr types.str; description = "comma separated list of ips not allowed to connect to the service"; };
+              temp-path = mkOption { type = types.nullOr types.str; description = "path to temp folder"; };
+              web-path = mkOption { type = types.nullOr types.str; description = "path to static web files (for development or custom front end)"; };
+              proxy-path = mkOption { type = types.nullOr types.str; description = "path prefix when service is run behind a proxy"; };
+              proxy-port = mkOption { type = types.nullOr types.str; description = "port of the proxy when the service is run behind a proxy"; };
+              ga-key = mkOption { type = types.nullOr types.str; description = "google analytics key for the front end"; };
+              uservoice-key = mkOption { type = types.nullOr types.str; description = "user voice key for the front end"; };
+              lets-encrypt-hosts = mkOption { type = types.nullOr (types.listOf types.str); description = "hosts to use for lets encrypt certificates"; };
+              log = mkOption { type = types.nullOr types.str; description = "path to log file"; };
+              cors-domains = mkOption { type = types.nullOr (types.listOf types.str); description = "comma separated list of domains for CORS, setting it enable CORS "; };
+              clamav-host = mkOption { type = types.nullOr types.str; description = "host for clamav feature"; };
+              rate-limit = mkOption { type = types.nullOr types.int; description = "request per minute"; };
+              max-upload-size = mkOption { type = types.nullOr types.int; description = "max upload size in kilobytes  "; };
+              purge-days = mkOption { type = types.nullOr types.int; description = "number of days after the uploads are purged automatically "; };
+              random-token-length = mkOption { type = types.nullOr types.int; description = "length of the random token for the upload path (double the size for delete path)"; };
+
+            };
+
+            provider_options = {
+
+                aws = {
+                  enable = mkEnableOption "Enable AWS backend";
+                  aws-access-key = mkOption { type = types.str; description = "aws access key"; };
+                  aws-secret-key = mkOption { type = types.str; description = "aws secret key"; };
+                  bucket = mkOption { type = types.str; description = "aws bucket "; };
+                  s3-endpoint = mkOption {
+                    type = types.nullOr types.str;
+                    description = ''
+                      Custom S3 endpoint. 
+                      If you specify the s3-region, you don't need to set the endpoint URL since the correct endpoint will used automatically.
+                    '';
+                  };
+                  s3-region = mkOption { type = types.str; description = "region of the s3 bucket eu-west-"; };
+                  s3-no-multipart = mkOption { type = types.nullOr types.bool; description = "disables s3 multipart upload "; };
+                  s3-path-style = mkOption { type = types.nullOr types.str; description = "Forces path style URLs, required for Minio. "; };
+                };
+
+                storj = {
+                  enable = mkEnableOption "Enable storj backend";
+                  storj-access = mkOption { type = types.str; description = "Access for the project"; };
+                  storj-bucket = mkOption { type = types.str; description = "Bucket to use within the project"; };
+                };
+
+                gdrive = {
+                  enable = mkEnableOption "Enable gdrive backend";
+                  gdrive-client-json = mkOption { type = types.str; description = "oauth client json config for gdrive provider"; };
+                  gdrive-chunk-size = mkOption { default = 8; type = types.nullOr types.int; description = "chunk size for gdrive upload in megabytes, must be lower than available memory (8 MB)"; };
+                  basedir = mkOption { type = types.str; description = "path storage for gdrive provider"; default = "${cfg.stateDir}/store"; };
+                  purge-interval = mkOption { type = types.nullOr types.int; description = "interval in hours to run the automatic purge for (not applicable to S3 and Storj)"; };
+
+                };
+
+                local = {
+                  enable = mkEnableOption "Enable gdrive backend";
+                  basedir = mkOption { type = types.str; description = "path storage for local provider"; default = "${cfg.stateDir}/store"; };
+                  purge-interval = mkOption { type = types.nullOr types.int; description = "interval in hours to run the automatic purge for (not applicable to S3 and Storj)"; };
+                };
+
+              };
+          in
+            {
+              options.services.transfer-sh = fold recursiveUpdate {} [
+                general_options
+                {
+                  provider = provider_options;
+                  user = mkOption {
+                    type = types.str;
+                    description = "User to run the service under";
+                    default = "transfer.sh";
+                  };
+                  group = mkOption {
+                    type = types.str;
+                    description = "Group to run the service under";
+                    default = "transfer.sh";
+                  };
+                  stateDir = mkOption {
+                    type = types.path;
+                    description = "Variable state directory";
+                    default = RUNTIME_DIR;
+                  };
+                }
+              ];
+
+              config = let
+
+                mkFlags = cfg: options:
+                  let
+                    mkBoolFlag = option: if cfg.${option} then [ "--${option}" ] else [];
+                    mkFlag = option:
+                      if isBool cfg.${option}
+                      then mkBoolFlag option
+                      else [ "--${option}" "${cfg.${option}}" ];
+
+                  in
+                    lists.flatten (map (mkFlag) (filter (option: cfg.${option} != null && option != "enable") options));
+
+                aws-config = (mkFlags cfg.provider.aws (attrNames provider_options)) ++ [ "--provider" "aws" ];
+                gdrive-config = mkFlags cfg.provider.gdrive (attrNames provider_options.gdrive) ++ [ "--provider" "gdrive" ];
+                storj-config = mkFlags cfg.provider.storj (attrNames provider_options.storj) ++ [ "--provider" "storj" ];
+                local-config = mkFlags cfg.provider.local (attrNames provider_options.local) ++ [ "--provider" "local" ];
+
+                general-config = concatStringsSep " " (mkFlags cfg (attrNames general_options));
+                provider-config = concatStringsSep " " (
+                  if cfg.provider.aws.enable && !cfg.provider.storj.enable && !cfg.provider.gdrive.enable && !cfg.provider.local.enable then aws-config
+                  else if !cfg.provider.aws.enable && cfg.provider.storj.enable && !cfg.provider.gdrive.enable && !cfg.provider.local.enable then storj-config
+                  else if !cfg.provider.aws.enable && !cfg.provider.storj.enable && cfg.provider.gdrive.enable && !cfg.provider.local.enable then gdrive-config
+                  else if !cfg.provider.aws.enable && !cfg.provider.storj.enable && !cfg.provider.gdrive.enable && cfg.provider.local.enable then local-config
+                  else throw "transfer.sh requires exactly one provider (aws, storj, gdrive, local)"
+                );
+
+              in
+                lib.mkIf cfg.enable
+                  {
+                    systemd.tmpfiles.rules = [
+                      "d ${cfg.stateDir} 0750 ${cfg.user} ${cfg.group} - -"
+                    ] ++ optional cfg.provider.gdrive.enable cfg.provider.gdrive.basedir
+                    ++ optional cfg.provider.local.enable cfg.provider.local.basedir;
+
+                    systemd.services.transfer-sh = {
+                      wantedBy = [ "multi-user.target" ];
+                      after = [ "network.target" ];
+                      serviceConfig = {
+                        User = cfg.user;
+                        Group = cfg.group;
+                        ExecStart = "${transfer-sh pkgs}/bin/transfer.sh ${general-config} ${provider-config} ";
+                      };
+                    };
+
+                    networking.firewall.allowedTCPPorts = [ cfg.listener cfg.profile-listener cfg.tls-listener ];
+                  };
+            };
+
+          default = { self, pkgs, ... }: {
+            imports = [ nixosModules.transfer-sh ];
+            # Network configuration.
+
+            # useDHCP is generally considered to better be turned off in favor
+            # of <adapter>.useDHCP
+            networking.useDHCP = false;
+            networking.firewall.allowedTCPPorts = [];
+
+            # Enable the inventaire server.
+            services.transfer-sh = {
+              enable = true;
+              provider.local = {
+                enable = true;
+              };
+            };
+
+            nixpkgs.config.allowUnfree = true;
+          };
+        };
+
+
+        nixosConfigurations."container" = nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          modules = [
+            nixosModules.default
+            ({ ... }: { boot.isContainer = true; })
+          ];
+        };
+
+      };
+}