Using packages to generate a rootfs image

One of the most common uses of Poky is the rootfs image generation. The rootfs image should be seen as a ready-to-use root filesystem for a target. The image can be composed of one or more filesystems. It may include other artifacts available during its generation, such as the Linux kernel, the device tree, and bootloader binaries. The process of generating the image is composed of several steps. Its most common uses are as follows:

1. Generating the rootfs directory
2. Creating the required files
3. Wrapping the final filesystem according to the specific requirements (it may be a disk file with several partitions and contents)
4. Finally, compressing it, if applicable

The sub-tasks of do_rootfs perform all these steps. rootfs is a directory with the desired packages installed, with the required tweaks applied afterward. The tweaks make minor adjustments to the rootfs contents – for example, when building a development...