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