feat(test): adding tests for the "File" struct

feat(test): moving util funcs into utils module

data/config/go-test-conf.json

@@ -0,0 +1,66 @@
+{
+    "ConfigFiles": [
+      {
+        "destination": "/etc/loki/loki-local-config.yaml",
+        "group": "grafana",
+        "mode": "600",
+        "owner": "loki",
+        "service": "loki",
+        "source": "loki-local-config.pktpl.hcl"
+      }
+    ],
+    "Daemons": {
+      "Loki": {
+        "enabled": true,
+        "name": "loki"
+      }
+    },
+    "Packages": {
+      "loki": {
+        "action": "install",
+        "name": "loki"
+      },
+      "nodeExporter": {
+        "action": "install",
+        "name": "prometheus-node-exporter"
+      },
+      "promtail": {
+        "action": "install",
+        "name": "loki-promtail"
+      }
+    },
+    "Repositories": {
+      "AlpineTesting": {
+        "enabled": true,
+        "name": "testing",
+        "type": "apk",
+        "url": "http://mirrors.bfsu.edu.cn/alpine/edge/testing"
+      }
+    },
+    "Users": {
+      "loki": {
+        "group": "grafana",
+        "home": "/srv/loki",
+        "shell": "/bin/nologin",
+        "username": "loki"
+      }
+    },
+    "Vars": {
+      "AlertManagerURL": "http://localhost:9092",
+      "AuthEnabled": false,
+      "GRPCPort": "9095",
+      "Group": "grafana",
+      "HTTPPort": "3099",
+      "LogLevel": "error",
+      "ObjectStore": "filesystem",
+      "S2": {
+        "APIKey": "",
+        "APISecretKey": "",
+        "BucketName": "",
+        "URL": ""
+      },
+      "SharedStore": "filesystem",
+      "StorageRoot": "/var/loki",
+      "User": "loki"
+    }
+  }

data/templates/go-test-go.tpl

@@ -0,0 +1,13 @@
+###  Go template test ###
+{{ if .Vars.AuthEnabled  }}
+auth_enabled: true
+{{ else  }}
+auth_enabled: false
+{{ end  }}
+
+server:
+  http_listen_port: {{ .Vars.HTTPPort }}
+  grpc_listen_port: {{ .Vars.GRPCPort }}
+  log_level: {{ .Vars.LogLevel }}
+
+### End Go template test ### 

data/templates/go-test-hcl.pktpl.hcl

@@ -0,0 +1,12 @@
+### HCL2 Template test ###
+%{ if Vars.AuthEnabled ~}
+auth_enabled: true
+%{ else }
+auth_enabled: false
+%{ endif }
+
+server:
+  http_listen_port: ${Vars.HTTPPort}
+  grpc_listen_port: ${Vars.GRPCPort}
+  log_level: ${Vars.LogLevel}
+### END HCL Template test ###

data/templates/loki-local-config.tpl

@@ -1,13 +1,13 @@
-{{ if .AuthEnabled  }}
+{{ if .Vars.AuthEnabled  }}
 auth_enabled: true
 {{ else  }}
 auth_enabled: false
 {{ end  }}
 
 server:
-  http_listen_port: {{ .HTTPPort }}
-  grpc_listen_port: {{ .GRPCPort }}
-  log_level: {{ .LogLevel }}
+  http_listen_port: {{ .Vars.HTTPPort }}
+  grpc_listen_port: {{ .Vars.GRPCPort }}
+  log_level: {{ .Vars.LogLevel }}
 
 ingester:
   wal: