nixos/trafficserver: avoid input from derivation

Using builtins.readFile to load upstream defaults is a clever trick, but
it's not allowed in restricted evaluation mode: which means it fails on
Hydra, for example. Besides - in Nixpkgs - depending on derivation as
inputs is considered bad practice and should be avoided.

nixos/modules/module-list.nix

@@ -1031,7 +1031,7 @@
   ./services/web-servers/shellinabox.nix
   ./services/web-servers/tomcat.nix
   ./services/web-servers/traefik.nix
-  ./services/web-servers/trafficserver.nix
+  ./services/web-servers/trafficserver/default.nix
   ./services/web-servers/ttyd.nix
   ./services/web-servers/uwsgi.nix
   ./services/web-servers/varnish/default.nix

nixos/modules/services/web-servers/trafficserver/default.nix

@@ -8,21 +8,9 @@ let
   group = config.users.groups.trafficserver.name;
 
   getManualUrl = name: "https://docs.trafficserver.apache.org/en/latest/admin-guide/files/${name}.en.html";
-  getConfPath = name: "${pkgs.trafficserver}/etc/trafficserver/${name}";
 
   yaml = pkgs.formats.yaml { };
 
-  fromYAML = f:
-    let
-      jsonFile = pkgs.runCommand "in.json"
-        {
-          nativeBuildInputs = [ pkgs.remarshal ];
-        } ''
-        yaml2json < "${f}" > "$out"
-      '';
-    in
-    builtins.fromJSON (builtins.readFile jsonFile);
-
   mkYamlConf = name: cfg:
     if cfg != null then {
       "trafficserver/${name}.yaml".source = yaml.generate "${name}.yaml" cfg;
@@ -73,7 +61,7 @@ in
 
     ipAllow = mkOption {
       type = types.nullOr yaml.type;
-      default = fromYAML (getConfPath "ip_allow.yaml");
+      default = builtins.fromJSON (builtins.readFile ./ip_allow.json);
       defaultText = "upstream defaults";
       example = literalExample {
         ip_allow = [{
@@ -94,7 +82,7 @@ in
 
     logging = mkOption {
       type = types.nullOr yaml.type;
-      default = fromYAML (getConfPath "logging.yaml");
+      default = builtins.fromJSON (builtins.readFile ./logging.json);
       defaultText = "upstream defaults";
       example = literalExample { };
       description = ''

nixos/modules/services/web-servers/trafficserver/ip_allow.json

@@ -0,0 +1,36 @@
+{
+  "ip_allow": [
+    {
+      "apply": "in",
+      "ip_addrs": "127.0.0.1",
+      "action": "allow",
+      "methods": "ALL"
+    },
+    {
+      "apply": "in",
+      "ip_addrs": "::1",
+      "action": "allow",
+      "methods": "ALL"
+    },
+    {
+      "apply": "in",
+      "ip_addrs": "0/0",
+      "action": "deny",
+      "methods": [
+        "PURGE",
+        "PUSH",
+        "DELETE"
+      ]
+    },
+    {
+      "apply": "in",
+      "ip_addrs": "::/0",
+      "action": "deny",
+      "methods": [
+        "PURGE",
+        "PUSH",
+        "DELETE"
+      ]
+    }
+  ]
+}

nixos/modules/services/web-servers/trafficserver/logging.json

@@ -0,0 +1,37 @@
+{
+  "logging": {
+    "formats": [
+      {
+        "name": "welf",
+        "format": "id=firewall time=\"%<cqtd> %<cqtt>\" fw=%<phn> pri=6 proto=%<cqus> duration=%<ttmsf> sent=%<psql> rcvd=%<cqhl> src=%<chi> dst=%<shi> dstname=%<shn> user=%<caun> op=%<cqhm> arg=\"%<cqup>\" result=%<pssc> ref=\"%<{Referer}cqh>\" agent=\"%<{user-agent}cqh>\" cache=%<crc>"
+      },
+      {
+        "name": "squid_seconds_only_timestamp",
+        "format": "%<cqts> %<ttms> %<chi> %<crc>/%<pssc> %<psql> %<cqhm> %<cquc> %<caun> %<phr>/%<shn> %<psct>"
+      },
+      {
+        "name": "squid",
+        "format": "%<cqtq> %<ttms> %<chi> %<crc>/%<pssc> %<psql> %<cqhm> %<cquc> %<caun> %<phr>/%<shn> %<psct>"
+      },
+      {
+        "name": "common",
+        "format": "%<chi> - %<caun> [%<cqtn>] \"%<cqtx>\" %<pssc> %<pscl>"
+      },
+      {
+        "name": "extended",
+        "format": "%<chi> - %<caun> [%<cqtn>] \"%<cqtx>\" %<pssc> %<pscl> %<sssc> %<sscl> %<cqcl> %<pqcl> %<cqhl> %<pshl> %<pqhl> %<sshl> %<tts>"
+      },
+      {
+        "name": "extended2",
+        "format": "%<chi> - %<caun> [%<cqtn>] \"%<cqtx>\" %<pssc> %<pscl> %<sssc> %<sscl> %<cqcl> %<pqcl> %<cqhl> %<pshl> %<pqhl> %<sshl> %<tts> %<phr> %<cfsc> %<pfsc> %<crc>"
+      }
+    ],
+    "logs": [
+      {
+        "filename": "squid",
+        "format": "squid",
+        "mode": "binary"
+      }
+    ]
+  }
+}