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-# nix-amer
+# | nix-amer |
 
-Configuration automation tool.
+```yaml
+name:        nix-amer
+version:     0.1.0
+description: Configuration automation tool
+author:      xdrm-brackets
+```
 
+>Need to automate the setup of your linux server or desktop ? This tool is made for you.
+
+
+
+[TOC]
+
+
+
+----
+
+### I. Build Format
+Your whole setup remains in 1 only build file. Each line contains one instruction, the list of instructions is listed below.
+
+
+
+#### 1) package management
+
+These instructions allow you to interact with the package system available on your system.
+
+```
+ins <packages>
+```
+Install the listed packages. If more than one, use spaces to separate package names.
+
+```
+upd
+```
+Update/upgrade your system.
+
+```
+del <packages>
+```
+Remove the listed packages. If more than one, use spaces to separate package names.
+
+
+
+#### 3) update configuration files
+
+This instruction allow you to update configuration files without the need of an editor and in a developer-readable manner.
+
+```
+cnf <expr> <content>
+```
+Update a configuration file where \<expr\> is a dot-separated human-readable [path expression](#ii-path-expressions) and \<content\> is a string or a file. If a string is given, it will override/add the field ; if a file is given the configuration file will be replaced by it.
+
+
+```
+cnf <expr>
+```
+Remove a configuration field matching the \<expr\> path.
+
+
+#### 4) service management
+
+These instructions allow you to interact with the service system (_cf. systemd_).
+
+```
+ser [enable|start|stop|restart|reload] <services>
+```
+Perform the action on services. If more than one, use spaces to separate service names.
+
+
+
+----
+
+### II. Path Expressions
+
+The syntax is pretty fast-forward, it uses 3 levels to find your configuration line : `subject@alt.field`.
+
+| Field     | Description                          | Example                    |
+| --------- | ------------------------------------ | -------------------------- |
+| `subject` | The name of the program to configure | `sshd`, `httpd`, `nginx` |
+| `alt` | Alternative file if there is more than one for a package. If **omitted** it will default to the _main_ configuration file. | `httpd@main`, `http@ports` |
+| `field` | Field is a dot-separated chain of strings that match with a configuration field. If **ommited**, the \<value\> will just be added at the end of the configuration file. In the same way if the field does not point to a raw field but a parent or group containing fields, the \<value\> will be added at the end. | `sshd.AllowGroups`, `nginx.http.gzip` |
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