forked from josch/mmdebstrap
move hooks/setup00-merged-usr.sh -> hooks/merged-usr/setup00.sh, expand docs
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2 changed files with 29 additions and 4 deletions
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@ -5,7 +5,13 @@
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#
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# Using this hook script, you can emulate what debootstrap does to set up
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# merged /usr via directory symlinks, even using the exact same shell function
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# that debootstrap uses.
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# that debootstrap uses by running mmdebstrap with:
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#
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# --setup-hook=/usr/share/mmdebstrap/hooks/merged-usr/setup00.sh
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#
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# Alternatively, you can setup merged-/usr by installing the usrmerge package:
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#
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# --include=usrmerge
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#
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# mmdebstrap will not include this functionality via a --merged-usr option
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# because there are many reasons against implementing merged-/usr that way:
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@ -24,6 +30,10 @@
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# The information whether a distribution uses this approach to merged-/usr or
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# not is not anymore contained in its packages but in a tool from the outside.
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#
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# Example real world problem: I'm using debbisect to bisect Debian unstable
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# between 2015 and today. For which snapshot.d.o timestamp should a merged-/usr
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# chroot be created and for which ones not?
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#
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# The problem is not the idea of merged-/usr but the problem is the way how it
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# got implemented in debootstrap via directory symlinks. That way of rolling
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# out merged-/usr is bad from the dpkg point-of-view and completely opposite of
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21
mmdebstrap
21
mmdebstrap
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@ -6227,6 +6227,10 @@ package list is free of duplicates. So the following are equivalent:
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--include=pkg1/stable,pkg2=1.0,pkg3-
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--incl=pkg1/stable --incl="pkg2=1.0 pkg3-" --incl=pkg2=1.0,pkg3-
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Example: setting up merged-/usr via the usrmerge package
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--include=usrmerge
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=item B<--components>=I<comp1>[,I<comp2>,...]
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Comma or whitespace separated list of components like main, contrib and
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@ -6273,13 +6277,19 @@ installed. At that point, the chroot directory does not contain any
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executables and thus cannot be chroot-ed into. See section B<HOOKS> for more
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information.
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Example: Setup merged-/usr via symlinks
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Example 1: Setup merged-/usr via symlinks, omitting the architecture specific
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symlinks
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--setup-hook='for d in bin sbin lib; do ln -s usr/$d "$1/$d";
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mkdir -p "$1/usr/$d"; done'
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Example: Setup chroot for installing a sub-essential busybox-based chroot with
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--variant=custom
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Example 2: Setup merged-/usr using debootstrap-method which takes care of the
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architecture specific symlinks
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--setup-hook=/usr/share/mmdebstrap/hooks/merged-usr/setup00.sh
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Example 3: Setup chroot for installing a sub-essential busybox-based chroot
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with --variant=custom
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--include=dpkg,busybox,libc-bin,base-files,base-passwd,debianutils
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--setup-hook='mkdir -p "$1/bin"'
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@ -6371,6 +6381,11 @@ Example 2: Setup chroot for installing a sub-essential busybox-based chroot
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--hook-dir=/usr/share/mmdebstrap/hooks/busybox
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Example 3: Setup merged-/usr using debootstrap-method which takes care of the
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architecture specific symlinks
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--hook-dir=/usr/share/mmdebstrap/hooks/merged-usr
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=item B<--skip>=I<stage>[,I<stage>,...]
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B<mmdebstrap> tries hard to implement sensible defaults and will try to stop
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