From 582d4c7fde40ce92344bfa19a556db7021665f82 Mon Sep 17 00:00:00 2001
From: Michael Grymporounis <michail.grymporounis@nokia.com>
Date: Wed, 8 Jul 2026 11:54:30 +0300
Subject: [PATCH] Control the packages created by docker build with build args

Building with docker can be controlled with two build args:
* ARCH is a space-separated list of architectures to build for
* PACKAGE is a space-separated list of package types to build
Default ARCH is "amd64 arm64" and PACKAGE is "msix deb rpm osx", allowing
for the whole list of supported packages to be built. Specifying different
values in the docker build command line allows limiting the scope of the
packages to build.

Update the README.md file to reflect these changes

Signed-off-by: Michael Grymporounis <michail.grymporounis@nokia.com>
---
 Dockerfile | 15 ++++++++-------
 README.md  | 35 +++++++++++++++++++++++++++++------
 2 files changed, 37 insertions(+), 13 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 4f34482..3cb803c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,13 +36,14 @@ FROM builder-image AS build-stage
 WORKDIR /app
 COPY . .
 
-RUN make msix GOARCH=amd64 && \
-    make deb GOARCH=amd64 && \
-    make rpm GOARCH=amd64 && \
-    make osx GOARCH=amd64 && \
-    make deb GOARCH=arm64 && \
-    make rpm GOARCH=arm64 && \
-    make osx GOARCH=arm64
+ARG ARCH="amd64 arm64"
+ARG PACKAGE="msix deb rpm osx"
+RUN for arch in ${ARCH}; do \
+      for pkg in ${PACKAGE}; do \
+        [ $pkg != msix -o $arch == amd64 ] || continue; \
+        make $pkg GOARCH=$arch || exit 1; \
+      done; \
+    done
 
 FROM scratch AS build-artifacts
 COPY --from=build-stage /app/dist /
diff --git a/README.md b/README.md
index 45db6b7..6abe044 100644
--- a/README.md
+++ b/README.md
@@ -82,23 +82,48 @@ can be targeted by name when running `corteca exec`.
 
 ## Build
 
-Clone the repository and run:
+### Building Locally
+
+To build locally, you need to have a Go toolchain installed. Clone the repository and run:
 
 ```bash
 $ make
 ```
 
-The compiled binary is placed in the `dist/` directory.
+The compiled binary is placed in the `dist/` directory. You can also build packages for your specific platform. The available `make` targets are `deb`, `rpm`, `osx` and `msix`:
+
+```bash
+$ make rpm
+```
 
 ### Build using Docker
 
-If you do not have a local Go toolchain, you can build entirely inside Docker
-(BuildKit is required):
+If you do not have a local Go toolchain, you can build entirely inside Docker (BuildKit is required). The following command builds all supported packages:
 
 ```bash
 $ docker build --output ./dist .
 ```
 
+#### Selecting the Packages to Build
+
+By default, packages are created for all architectures (`arm64` and `amd64`). You can select the architectires to build for by setting the `ARCH` build-time variable to the space-separated list of architectures to build for. For example, to only build packages for the `amd64` architecture run:
+
+```bash
+$ docker build --build-arg ARCH="amd64" --output ./dist .
+```
+
+The package types created by default are `deb`, `rpm`, `osx` and `msix`. To only build selected package types, set the `PACKAGE` build-time variable to the space-separated list of package types to build. The following command only builds `deb` and `rpm` packages on all architectures:
+
+```bash
+$ docker build --build-arg PACKAGE="deb rpm" --output ./dist .
+```
+
+By setting both the `ARCH` and `PACKAGE` build-time variables, you can further limit the build scope to specific packages. For example, to only build the `deb` package for the `amd64` architecture, run:
+
+```bash
+$ docker build --build-arg ARCH="amd64" --build-arg PACKAGE="deb" --output ./dist .
+```
+
 #### Installing Docker BuildKit
 
 On Docker Engine < 23.0, BuildKit must be enabled manually. On Ubuntu 22.04:
@@ -111,8 +136,6 @@ Then either prefix each `docker build` invocation with `DOCKER_BUILDKIT=1`, or
 follow the [official instructions](https://docs.docker.com/build/buildkit/#getting-started)
 to enable it globally.
 
-> For the full build guide see [doc/BUILD.md](doc/BUILD.md).
-
 ## Install
 
 ### Install manually from source