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nixpkgs/make-disk.sh

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* Scripts to set up and run the absolute minimal pure Nix environment; that is, an operating system environment in which there is (essentially) only a store. The script `make-disk.sh' creates an ext2 disk image, creates a Nix store in it, and copies the closure of the bash package (from nixpkgs) to it. The script `run.sh' then starts bash in a UML virtual machine. The contents of the image after creation look like this: $ ls -l drwxr-xr-x 2 root root 1024 2004-02-14 19:13 dev lrwxrwxrwx 1 root root 61 2004-02-14 23:34 init -> /nix/store/e40873ece7a010752ad72b4262b23d28-bash-2.05b/bin/sh drwx------ 2 root root 12288 2004-02-14 19:13 lost+found drwxr-xr-x 4 root root 1024 2004-02-14 19:13 nix drwxr-xr-x 2 root root 1024 2004-02-14 19:13 proc drwxrwxrwt 2 root root 1024 2004-02-14 19:13 tmp The next step is to add all the other stuff that goes into a working system (coreutils, etc.). BTW, if you don't have `ls' you can still list directories by doing `echo *' :-) Nix itself should also be Nixified so that it can be put into the store. svn path=/nixu/trunk/; revision=783
2004-02-14 23:56:51 +01:00
#! /bin/sh -e
image=/tmp/disk.img
size=$(expr 256 \* 1024 \* 1024)
* Use sysvinit's init to start the system. This has the happy side-effect of initialising the console properly (i.e., enabling Ctrl-[C, Z]). svn path=/nixu/trunk/; revision=801
2004-02-18 11:56:07 +01:00
storePaths=/tmp/storepaths
* Scripts to set up and run the absolute minimal pure Nix environment; that is, an operating system environment in which there is (essentially) only a store. The script `make-disk.sh' creates an ext2 disk image, creates a Nix store in it, and copies the closure of the bash package (from nixpkgs) to it. The script `run.sh' then starts bash in a UML virtual machine. The contents of the image after creation look like this: $ ls -l drwxr-xr-x 2 root root 1024 2004-02-14 19:13 dev lrwxrwxrwx 1 root root 61 2004-02-14 23:34 init -> /nix/store/e40873ece7a010752ad72b4262b23d28-bash-2.05b/bin/sh drwx------ 2 root root 12288 2004-02-14 19:13 lost+found drwxr-xr-x 4 root root 1024 2004-02-14 19:13 nix drwxr-xr-x 2 root root 1024 2004-02-14 19:13 proc drwxrwxrwt 2 root root 1024 2004-02-14 19:13 tmp The next step is to add all the other stuff that goes into a working system (coreutils, etc.). BTW, if you don't have `ls' you can still list directories by doing `echo *' :-) Nix itself should also be Nixified so that it can be put into the store. svn path=/nixu/trunk/; revision=783
2004-02-14 23:56:51 +01:00
successors=/tmp/successors
if ! test -f $image; then
echo creating empty disk of $size bytes in $image...
# Note: this is a sparse file.
dd if=/dev/zero of=$image bs=1 seek=$(expr $size - 1) count=1
echo creating disk image in $image...
/sbin/mke2fs -F $image
fi
# What to copy?
* Use sysvinit's init to start the system. This has the happy side-effect of initialising the console properly (i.e., enabling Ctrl-[C, Z]). svn path=/nixu/trunk/; revision=801
2004-02-18 11:56:07 +01:00
storeExpr=$(echo '(import ./pkgs.nix).everything' | nix-instantiate -)
nix-store -rB $storeExpr
nix-store -qn --requisites $storeExpr > $storePaths
* Scripts to set up and run the absolute minimal pure Nix environment; that is, an operating system environment in which there is (essentially) only a store. The script `make-disk.sh' creates an ext2 disk image, creates a Nix store in it, and copies the closure of the bash package (from nixpkgs) to it. The script `run.sh' then starts bash in a UML virtual machine. The contents of the image after creation look like this: $ ls -l drwxr-xr-x 2 root root 1024 2004-02-14 19:13 dev lrwxrwxrwx 1 root root 61 2004-02-14 23:34 init -> /nix/store/e40873ece7a010752ad72b4262b23d28-bash-2.05b/bin/sh drwx------ 2 root root 12288 2004-02-14 19:13 lost+found drwxr-xr-x 4 root root 1024 2004-02-14 19:13 nix drwxr-xr-x 2 root root 1024 2004-02-14 19:13 proc drwxrwxrwt 2 root root 1024 2004-02-14 19:13 tmp The next step is to add all the other stuff that goes into a working system (coreutils, etc.). BTW, if you don't have `ls' you can still list directories by doing `echo *' :-) Nix itself should also be Nixified so that it can be put into the store. svn path=/nixu/trunk/; revision=783
2004-02-14 23:56:51 +01:00
(while read storepath; do
nix-store -q --predecessors $storepath | (while read predecessor; do
echo $predecessor $storepath
done)
* Use sysvinit's init to start the system. This has the happy side-effect of initialising the console properly (i.e., enabling Ctrl-[C, Z]). svn path=/nixu/trunk/; revision=801
2004-02-18 11:56:07 +01:00
done) < $storePaths > $successors
# Location of sysvinit?
sysvinitPath=$(nix-store -qn $(echo '(import ./pkgs.nix).sysvinit' | nix-instantiate -))
* Proper sysvinit boot/halt. At runlevel 2, creates login shells at virtual consoles 0 and 1. To shutdown, do `init 0' (`halt' and `shutdown' don't work because they call /sbin/init). svn path=/nixu/trunk/; revision=803
2004-02-18 15:56:32 +01:00
# Location of Nix boot scripts?
bootPath=$(nix-store -qn $(echo '(import ./pkgs.nix).boot' | nix-instantiate -))
* Scripts to set up and run the absolute minimal pure Nix environment; that is, an operating system environment in which there is (essentially) only a store. The script `make-disk.sh' creates an ext2 disk image, creates a Nix store in it, and copies the closure of the bash package (from nixpkgs) to it. The script `run.sh' then starts bash in a UML virtual machine. The contents of the image after creation look like this: $ ls -l drwxr-xr-x 2 root root 1024 2004-02-14 19:13 dev lrwxrwxrwx 1 root root 61 2004-02-14 23:34 init -> /nix/store/e40873ece7a010752ad72b4262b23d28-bash-2.05b/bin/sh drwx------ 2 root root 12288 2004-02-14 19:13 lost+found drwxr-xr-x 4 root root 1024 2004-02-14 19:13 nix drwxr-xr-x 2 root root 1024 2004-02-14 19:13 proc drwxrwxrwt 2 root root 1024 2004-02-14 19:13 tmp The next step is to add all the other stuff that goes into a working system (coreutils, etc.). BTW, if you don't have `ls' you can still list directories by doing `echo *' :-) Nix itself should also be Nixified so that it can be put into the store. svn path=/nixu/trunk/; revision=783
2004-02-14 23:56:51 +01:00
# Fill the disk with the minimal Nix store.
if ! test -d /tmp/mnt; then mkdir /tmp/mnt; fi
* Use sysvinit's init to start the system. This has the happy side-effect of initialising the console properly (i.e., enabling Ctrl-[C, Z]). svn path=/nixu/trunk/; revision=801
2004-02-18 11:56:07 +01:00
linux ubd0=$image root=/dev/root rootflags=/ rootfstype=hostfs \
* Proper sysvinit boot/halt. At runlevel 2, creates login shells at virtual consoles 0 and 1. To shutdown, do `init 0' (`halt' and `shutdown' don't work because they call /sbin/init). svn path=/nixu/trunk/; revision=803
2004-02-18 15:56:32 +01:00
init="$(pwd)/fill-disk.sh $sysvinitPath $bootPath"
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