entrypoint/: let Icinga Web render its config files, not a Go lib

It knows best what they have to look like to be interpreted correctly.
Especially the proper quoting of special characters is important.

entrypoint/db-init/application/clicommands/ConfigCommand.php

@@ -0,0 +1,16 @@
+<?php
+// Icinga Web 2 Docker image | (c) 2024 Icinga GmbH | GPLv2+
+
+namespace Icinga\Module\Dockerentrypoint\Clicommands;
+
+use Icinga\Application\Config;
+use Icinga\Cli\Command;
+use Icinga\Util\Json;
+
+class ConfigCommand extends Command
+{
+    public function renderAction(): void
+    {
+        echo Config::fromArray(Json::decode(file_get_contents('php://stdin'), true));
+    }
+}

entrypoint/go.mod

@@ -1,8 +1,3 @@
 module entrypoint
 
 go 1.14
-
-require (
-	github.com/go-ini/ini v1.67.0
-	github.com/stretchr/testify v1.7.0 // indirect
-)

entrypoint/go.sum

@@ -1,13 +0,0 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-ini/ini v1.67.0 h1:z6ZrTEZqSWOTyH2FlglNbNgARyHG8oLW9gMELqKr06A=
-github.com/go-ini/ini v1.67.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

entrypoint/main.go

@@ -7,7 +7,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"github.com/go-ini/ini"
 	"io/ioutil"
 	"os"
 	"os/exec"
@@ -47,9 +46,18 @@ func entrypoint() error {
 			}
 		}
 
+		{
+			enMod := path.Join(enModsDir, "dockerentrypoint")
+			if errSl := os.Symlink("/entrypoint-db-init", enMod); errSl != nil && !os.IsExist(errSl) {
+				return errSl
+			}
+
+			defer os.Remove(enMod)
+		}
+
 		logf("debug", "Translating env vars to .ini config")
 
-		cfgs := map[string]*ini.File{}
+		cfgs := map[string]map[string]map[string]string{}
 		var enabledModules map[string]struct{} = nil
 		passwords := map[string]map[string]string{}
 
@@ -91,16 +99,19 @@ func entrypoint() error {
 								cfg, ok := cfgs[file]
 
 								if !ok {
-									cfg = ini.Empty()
+									cfg = map[string]map[string]string{}
 									cfgs[file] = cfg
 								}
 
-								_, errNK := cfg.Section(directive[len(directive)-2]).NewKey(
-									directive[len(directive)-1], kv[1],
-								)
-								if errNK != nil {
-									return errNK
+								sectionName := directive[len(directive)-2]
+								section, hasSection := cfg[sectionName]
+
+								if !hasSection {
+									section = map[string]string{}
+									cfg[sectionName] = section
 								}
+
+								section[directive[len(directive)-1]] = kv[1]
 							}
 						}
 					}
@@ -116,7 +127,23 @@ func entrypoint() error {
 				return errMA
 			}
 
-			if errST := cfg.SaveTo(file); errST != nil {
+			jsn := &bytes.Buffer{}
+			ini := &bytes.Buffer{}
+
+			if err := json.NewEncoder(jsn).Encode(cfg); err != nil {
+				return err
+			}
+
+			cmd := exec.Command("icingacli", "dockerentrypoint", "config", "render")
+			cmd.Stdin = jsn
+			cmd.Stdout = ini
+			cmd.Stderr = os.Stderr
+
+			if errRn := cmd.Run(); errRn != nil {
+				return errRn
+			}
+
+			if errST := os.WriteFile(file, ini.Bytes(), 0o640); errST != nil {
 				return errST
 			}
 		}
@@ -129,6 +156,8 @@ func entrypoint() error {
 				return errRD
 			}
 
+			enabledModules["dockerentrypoint"] = struct{}{}
+
 			for _, mod := range mods {
 				mod := mod.Name()
 				if _, ok := enabledModules[mod]; ok {
@@ -175,15 +204,6 @@ func entrypoint() error {
 func initDb(passwords map[string]map[string]string) error {
 	logf("info", "Checking database resources used as backends")
 
-	{
-		enMod := path.Join(enModsDir, "dockerentrypoint")
-		if errSl := os.Symlink("/entrypoint-db-init", enMod); errSl != nil {
-			return errSl
-		}
-
-		defer os.Remove(enMod)
-	}
-
 	{
 		enMod := path.Join(enModsDir, "setup")