docs: improve README to account for power-server use

README.md

@@ -5,48 +5,36 @@
 This extension is an experiment to measure and display the power consumption of your application as it runs in Dev mode.
 Only Linux/amd64 and macOS (amd64/apple silicon) are supported at the moment. See below for platform-specific
 requirements.
-
-## Requirements
-
-### macOS
-
-The power monitoring is performed using the bundled `powermetrics` tool, which requires `sudo` access. For convenience
-and security, it's recommended you add your user to the `sudoers` file, giving it passwordless access
-to `/usr/bin/powermetrics` (and possibly, only that).
 
-### Linux
-
-The extension makes use of the RAPL information accessible under the `/sys/class/powercap/intel-rapl` directory. For
-security purposes, some of that information is only readable by root, in particular the values that we need to get the
-power consumption, currently:
+## Requirements
 
-- /sys/class/powercap/intel-rapl/intel-rapl:1/energy_uj (if available)
-- /sys/class/powercap/intel-rapl/intel-rapl:0/energy_uj
-- /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:2/energy_uj
+### power-server
 
-For the extension to work properly, these files need to be readable by the current user, which you can accomplish by
-running the provided `make_power_readable.sh` script. Note that this change will only persist until the next restart.
+This extension relies on retrieving power consumption measurements from an application
+called [power-server](https://github.com/metacosm/power-server). This application needs to be run using `sudo` to get
+access to the underlying OS' power reporting layer. Please download the appropriate version for your OS from
+the [release page](https://github.com/metacosm/power-server/releases/). Once downloaded, you can unpack
+the archive and navigate to the `bin` directory to find the `power-server` binary that you can then run
+using: `sudo power-server`.
 
 ## Usage
 
 To use the extension:
 
-1. Clone this repository locally
-2. Build the code using `mvn install`
-3. Add the extension to the application which energy consumption you wish to measure. Since the extension is not yet
-   released, you will need to add it manually as a dependency to your application:
+1. Add the extension to the application which energy consumption you wish to measure. You can add it as a dependency to
+   your application:
     ```xml
    <dependency>
      <groupId>io.quarkiverse.power</groupId>
      <artifactId>quarkus-power</artifactId>
     <version>${project.version}</version>
    </dependency>
    ``` 
-4. Start your application in dev mode: `quarkus dev`
-5. Enter the dev mode terminal by pressing `:` (column)
-6. You should have a new `power` command available, type `power -h` for more information
-7. You can start power measurement with `power start` and stop it with `power stop`, at which time the power consumption
+2. Start your application in dev mode: `quarkus dev`
+3. Enter the dev mode terminal by pressing `:` (column)
+4. You should have a new `power` command available, type `power -h` for more information
+5. You can start power measurement with `power start` and stop it with `power stop`, at which time the power consumption
    of your app will be displayed.
-8. You can also ask for power to be measured for a given duration by using the `-s` option when
+6. You can also ask for power to be measured for a given duration by using the `-s` option when
    calling `power start`. In this case, there's no need to call `power stop`, the energy consumed during the specified
    time will be automatically displayed once the time period is elapsed.