59 lines
2 KiB
Nix
59 lines
2 KiB
Nix
# This Nix expression builds the script that performs the first stage
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# of booting the system: it loads the modules necessary to mount the
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# root file system, then calls /init in the root file system to start
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# the second boot stage. The closure of the result of this expression
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# is supposed to be put into an initial RAM disk (initrd).
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{ substituteAll, staticShell, staticTools
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, module_init_tools, extraUtils, modules, modulesDir
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, # Whether to find root device automatically using its label.
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autoDetectRootDevice
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, # If not scanning, the root must be specified explicitly. Actually,
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# stage 1 can mount multiple file systems. This is necessary if,
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# for instance, /nix (necessary for stage 2) is on a different file
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# system than /.
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#
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# This is a list of {mountPoint, device|label} attribute sets, i.e.,
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# the format used by the fileSystems configuration option. There
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# must at least be a file system for the / mount point in this list.
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fileSystems ? []
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# If scanning, we need a disk label.
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, rootLabel
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, # The path of the stage 2 init to call once we've mounted the root
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# device.
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stage2Init ? "/init"
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}:
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let
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# !!! use XML; copy&pasted from upstart-jobs/filesystems.nix.
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mountPoints = map (fs: fs.mountPoint) fileSystems;
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devices = map (fs: if fs ? device then fs.device else "LABEL=" + fs.label) fileSystems;
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fsTypes = map (fs: if fs ? fsType then fs.fsType else "auto") fileSystems;
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optionss = map (fs: if fs ? options then fs.options else "defaults") fileSystems;
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in
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assert !autoDetectRootDevice -> mountPoints != [];
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substituteAll {
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src = ./boot-stage-1-init.sh;
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isExecutable = true;
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inherit staticShell modules modulesDir;
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inherit autoDetectRootDevice mountPoints devices fsTypes optionss;
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rootLabel = if autoDetectRootDevice then rootLabel else "";
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path = [
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staticTools
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module_init_tools
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extraUtils
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];
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# We only want the path of the stage 2 init, we don't want it as a
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# dependency (since then it the stage 2 init would end up in the
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# initrd).
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stage2Init = toString stage2Init; # !!! doesn't work
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}
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