Simon,
If you want to see all command lines, you can pass '--verbose' or '-V' flag to Hadrian and it will then print out everything it does.
But you can also choose which particular command lines to print in UserSettings, see:
https://github.com/snowleopard/hadrian/blob/master/doc/user-settings.md#verbose-command-lines
So, you can do:
verboseCommand = input "//GHC/Real.hs"
Or, alternatively,
verboseCommand = output "//GHC/Real.hi"
Both should produce the same result (in theory).
In general, we have the following documents on Hadrian:
The README: https://github.com/snowleopard/hadrian/blob/master/README.md
How to use UserSettings: https://github.com/snowleopard/hadrian/blob/master/doc/user-settings.md
An overview of build flavours: https://github.com/snowleopard/hadrian/blob/master/doc/flavours.md
I hope the more Hadrian gets used, the more complete the documentation will become.
Cheers,
Andrey
From: Simon Peyton Jones [mailto:simonpj@microsoft.com]
Sent: 30 August 2018 12:19
To: Simon Peyton Jones <simonpj@microsoft.com>; Alp Mestanogullari <alp@well-typed.com>; Andrey Mokhov <andrey.mokhov@newcastle.ac.uk>
Cc: ghc-devs <ghc-devs@haskell.org>
Subject: RE: Hadrian
Sigh. As an inconvenient workaround, I tried adding {-# OPTIONS_GHC -dverbose-core2core #-} to GHC.Real, and then doing
cabal new-run hadrian -- -c -j4 --flavour=quick --directory=".."
in hadrian/
That did recompile GHC.Real - but all the debug output disappeared!
I tried adding {-# OPTIONS_GHC -ddebug-output #-} as well, but that didn't work.
I'm stuck - any ideas?
Simon
From: ghc-devs <ghc-devs-bounces@haskell.org> On Behalf Of Simon Peyton Jones via ghc-devs
Sent: 30 August 2018 12:12
To: Alp Mestanogullari <alp@well-typed.com>; Andrey Mokhov <andrey.mokhov@newcastle.ac.uk>
Cc: ghc-devs <ghc-devs@haskell.org>
Subject: Hadrian
Alp, Andrey
The old build system printed out every command line; and I often copy-paste that info to build single modules.
Eg currently, when trying to understand #15570 I see a suspicious GHC.Real.hi. So I want to manually recompile GHC.Real (from base), adding some debug flags. How can I get the right command line to do that from the build log?
Where is the "how to use Hadrian" wiki page? I know you've been writing one.
Simon
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