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* Properties that run an arbitrary command, such as cmdProperty
and scriptProperty are converted to use UncheckedProperty, since
they cannot tell on their own if the command truely made a change or not.
(API Change)
Transition guide:
- When GHC complains about an UncheckedProperty, add:
`assume` MadeChange
- Since these properties used to always return MadeChange, that
change is always safe to make.
- Or, if you know that the command should modifiy a file, use:
`changesFile` filename
* A few properties have had their Result improved, for example
Apt.buldDep and Apt.autoRemove now check if a change was made or not.
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needs its result checked, and checkResult and changesFile to check for changes.
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don't exist.
This is the same method user-setup uses.
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Based on a property in spwhitton's config, but rewritten.
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repository url normally implicitly set when using --spin.
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This adds a dependency on Text, but I don't mind propellor depending on it
and am somewhat surprised it doesn't already.
Using Text also lets this use encodeUtf8 instead of the nasty hack it was
using to go from String -> ByteString.
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I had 2 MVars both involved in the same lock, and it seemed intractable to
avoid deadlocks with them. STM makes it easy.
At this point, the concurrent process stuff seems to work pretty well, but
I'm not 100% sure it's not got some bugs.
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Not yet handled: Output from concurrent programs.
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RevertableProperty used to be assumed to contain info, but this is now made
explicit, with RevertableProperty HasInfo or RevertableProperty NoInfo.
Transition guide:
- If you define a RevertableProperty, expect some type check
failures like: "Expecting one more argument to ‘RevertableProperty’".
- Change it to "RevertableProperty NoInfo"
- The compiler will then tell you if it needs "HasInfo" instead.
- If you have code that uses the RevertableProperty constructor
that fails to type check, use the more powerful <!> operator
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* Various property combinators that combined a RevertableProperty
with a non-revertable property used to yield a RevertableProperty.
This was a bug, because the combined property could not be fully
reverted in many cases. Fixed by making the combined property
instead be a Property HasInfo.
* combineWith now takes an addional parameter to control how revert
actions are combined (API change).
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Note that no output multiplexing is currently done.
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chroot, and won't affect the hostname of the host system.
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Hmm, do I really need my own type class for LiftPropellor? This seems like
a general problem so I am probably reinventing the wheel.
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* Where before debootstrapped and bootstrapped took a System parameter,
the os property should now be added to the Chroot.
* Follow-on change to Systemd.container, which now takes a System parameter.
Two motivations for this change:
1. When using ChrootTarball, there may be no particular System that
makes sense for the contents of the tarball, so don't force the user to
specify one.
2. When creating a chroot for a disk image with the same properties
as an existing Host, using hostProperties host to get them, this
allows inheriting the os property from the host, and doesn't require
it to be redundantly passed to Chroot.debootstrapped.
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