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README.md: Add more info on Docker

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Sam Tygier 2019-02-17 16:27:43 +00:00 committed by XECDesign
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@ -7,7 +7,8 @@ _Tool used to create the raspberrypi.org Raspbian images_
pi-gen runs on Debian based operating systems. Currently it is only supported on
either Debian Stretch or Ubuntu Xenial and is known to have issues building on
earlier releases of these systems.
earlier releases of these systems. On other Linux distributions it may be possible
to use the Docker build described below.
To install the required dependencies for pi-gen you should run:
@ -158,6 +159,13 @@ It is recommended to examine build.sh for finer details.
## Docker Build
Docker can be used to perform the build inside a container. This partially isolates
the build from the host system, and allows using the script on non-debian based
systems (e.g. Fedora Linux). The isolate is not complete due to the need to use
some kernel level services for arm emulation (binfmt) and loop devices (losetup).
To build:
```bash
vi config # Edit your config file. See above.
./build-docker.sh
@ -173,6 +181,12 @@ continue:
CONTINUE=1 ./build-docker.sh
```
To examine the container after a failure you can enter a shell within it using:
```bash
sudo docker run -it --privileged --volumes-from=pigen_work pi-gen /bin/bash
```
After successful build, the build container is by default removed. This may be undesired when making incremental changes to a customized build. To prevent the build script from remove the container add
```bash