yesod devel fails for stack-built and installed yesod-bin / yesod project

[bitemyapp]

$ stack install yesod-bin
Run from outside a project, using implicit global config
Using resolver: lts-3.1 from global config file: /home/callen/.stack/global/stack.yaml
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod to /home/callen/.local/bin/yesod
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ar-wrapper to /home/callen/.local/bin/yesod-ar-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ghc-wrapper to /home/callen/.local/bin/yesod-ghc-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ld-wrapper to /home/callen/.local/bin/yesod-ld-wrapper

Copied executables to /home/callen/.local/bin:
- yesod-ld-wrapper
- yesod-ghc-wrapper
- yesod-ar-wrapper
- yesod

$ stack exec -- yesod devel 
Yesod devel server. Type 'quit' to quit
Application can be accessed at:

http://127.0.0.1:3000
https://127.0.0.1:3443
If you wish to test https capabilities, you should set the following variable:
  export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 50.1 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
ERROR: Yesod has been compiled with a different GHC version, please reinstall yesod-bin
yesod: ExitFailure 1
^C

Same resolver for both. Any ideas?

[snoyberg]

What does stack exec which yesod say?

On Thu, Oct 8, 2015, 3:55 AM Chris Allen notifications@github.com wrote:

$ stack install yesod-bin
Run from outside a project, using implicit global config
Using resolver: lts-3.1 from global config file: /home/callen/.stack/global/stack.yaml
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod to /home/callen/.local/bin/yesod
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ar-wrapper to /home/callen/.local/bin/yesod-ar-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ghc-wrapper to /home/callen/.local/bin/yesod-ghc-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ld-wrapper to /home/callen/.local/bin/yesod-ld-wrapper

Copied executables to /home/callen/.local/bin:

• yesod-ld-wrapper
• yesod-ghc-wrapper
• yesod-ar-wrapper
• yesod

$ stack exec -- yesod devel
Yesod devel server. Type 'quit' to quit
Application can be accessed at:
http://127.0.0.1:3000https://127.0.0.1:3443
If you wish to test https capabilities, you should set the following variable:
export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 50.1 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
ERROR: Yesod has been compiled with a different GHC version, please reinstall yesod-bin
yesod: ExitFailure 1
^C

Same resolver for both. Any ideas?

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#1125.

[bitemyapp]

$ stack exec -- which yesod
/home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod

Weird, right?

[snoyberg]

And I'm assuming you're using lts-3.1 in your project? What does stack exec
which ghc say?

On Thu, Oct 8, 2015, 7:01 AM Chris Allen notifications@github.com wrote:

$ stack exec -- which yesod
/home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod

Weird, right?

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Reply to this email directly or view it on GitHub
#1125 (comment)
.

[bitemyapp]

$ stack exec -- which ghc
/usr/bin/ghc

$ /usr/bin/ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.10.2

Right GHC version, but I think that's the wrong GHC. Could be wrong.

[snoyberg]

Can you try running stack install yesod-bin from inside the project and see
what the result is? That's actually the recommended approach.

On Thu, Oct 8, 2015, 7:34 AM Chris Allen notifications@github.com wrote:

$ stack exec -- which ghc
/usr/bin/ghc

$ /usr/bin/ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.10.2

Right GHC version, but I think that's the wrong GHC. Could be wrong.

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#1125 (comment)
.

[bitemyapp]

[callen@chania ~/work/open-cis194 fuck-it]
$ stack install yesod-bin
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod to /home/callen/.local/bin/yesod
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ar-wrapper to /home/callen/.local/bin/yesod-ar-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ghc-wrapper to /home/callen/.local/bin/yesod-ghc-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ld-wrapper to /home/callen/.local/bin/yesod-ld-wrapper

Copied executables to /home/callen/.local/bin:
- yesod-ld-wrapper
- yesod-ghc-wrapper
- yesod-ar-wrapper
- yesod
[callen@chania ~/work/open-cis194 fuck-it]
$ stack build && stack exec -- yesod devel
open-cis194-0.0.0: unregistering (local file changes)
open-cis194-0.0.0: configure
Configuring open-cis194-0.0.0...
open-cis194-0.0.0: build
Preprocessing library open-cis194-0.0.0...
In-place registering open-cis194-0.0.0...
Preprocessing executable 'open-cis194' for open-cis194-0.0.0...
open-cis194-0.0.0: install
Installing library in
/home/callen/work/open-cis194/.stack-work/install/x86_64-linux/lts-3.1/7.10.2/lib/x86_64-linux-ghc-7.10.2/open-cis194-0.0.0-1Tt69bAJvHwD7b1fmy7NgT
Installing executable(s) in
/home/callen/work/open-cis194/.stack-work/install/x86_64-linux/lts-3.1/7.10.2/bin
Registering open-cis194-0.0.0...
Yesod devel server. Type 'quit' to quit
Application can be accessed at:

http://127.0.0.1:3000
https://127.0.0.1:3443
If you wish to test https capabilities, you should set the following variable:
  export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 50.2 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
ERROR: Yesod has been compiled with a different GHC version, please reinstall yesod-bin
yesod: ExitFailure 1
^C
[callen@chania ~/work/open-cis194 fuck-it]
$ which yesod    
/home/callen/.local/bin/yesod

[snoyberg]

OK, one more idea:

stack exec which runghc
stack exec -- runghc --version
stack exec -- runghc --numeric-version

On Thu, Oct 8, 2015 at 7:39 AM, Chris Allen notifications@github.com
wrote:

[callen@chania ~/work/open-cis194 fuck-it]
$ stack install yesod-bin
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod to /home/callen/.local/bin/yesod
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ar-wrapper to /home/callen/.local/bin/yesod-ar-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ghc-wrapper to /home/callen/.local/bin/yesod-ghc-wrapper
Copying from /home/callen/.stack/snapshots/x86_64-linux/lts-3.1/7.10.2/bin/yesod-ld-wrapper to /home/callen/.local/bin/yesod-ld-wrapper

Copied executables to /home/callen/.local/bin:

• yesod-ld-wrapper
• yesod-ghc-wrapper
• yesod-ar-wrapper
• yesod
  [callen@chania ~/work/open-cis194 fuck-it]
  $ stack build && stack exec -- yesod devel
  open-cis194-0.0.0: unregistering (local file changes)
  open-cis194-0.0.0: configure
  Configuring open-cis194-0.0.0...
  open-cis194-0.0.0: build
  Preprocessing library open-cis194-0.0.0...
  In-place registering open-cis194-0.0.0...
  Preprocessing executable 'open-cis194' for open-cis194-0.0.0...
  open-cis194-0.0.0: install
  Installing library in
  /home/callen/work/open-cis194/.stack-work/install/x86_64-linux/lts-3.1/7.10.2/lib/x86_64-linux-ghc-7.10.2/open-cis194-0.0.0-1Tt69bAJvHwD7b1fmy7NgT
  Installing executable(s) in
  /home/callen/work/open-cis194/.stack-work/install/x86_64-linux/lts-3.1/7.10.2/bin
  Registering open-cis194-0.0.0...
  Yesod devel server. Type 'quit' to quit
  Application can be accessed at:
  http://127.0.0.1:3000https://127.0.0.1:3443
  If you wish to test https capabilities, you should set the following variable:
  export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 50.2 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
ERROR: Yesod has been compiled with a different GHC version, please reinstall yesod-bin
yesod: ExitFailure 1
^C
[callen@chania ~/work/open-cis194 fuck-it]
$ which yesod
/home/callen/.local/bin/yesod

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#1125 (comment)
.

[bitemyapp]

@snoyberg That was it.

$ stack exec which runghc
/usr/bin/runghc
[callen@chania ~/work/open-cis194 fuck-it]
$ stack exec -- runghc --version
runghc 7.6.3

How do I make it never-ever do that and only use a locally installed GHC? At a configuration level I mean, I don't want to pass the system-ghc flags every time.

Using the system ghc seems like a dubious default to me. Things are more likely to just work if Stack uses its own tools for everything - people that want to use a system ghc should be asked to configure/pass arguments explicitly. A lot of people moving to Stack are going to have a system installed GHC of some kind lingering in the background.

I've amended my config.yaml to set system-ghc to false to avoid a repeat.

[bitemyapp]

We appear to be all set here, I'll make a ticket proposing changing the default.

[callen@chania ~/work/open-cis194 fuck-it]
$ stack exec -- which runghc          
/home/callen/.stack/programs/x86_64-linux/ghc-7.10.2/bin/runghc
[callen@chania ~/work/open-cis194 fuck-it]
$ stack exec -- yesod devel 
Yesod devel server. Type 'quit' to quit
Application can be accessed at:

http://127.0.0.1:3000
https://127.0.0.1:3443
If you wish to test https capabilities, you should set the following variable:
  export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 51.2 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
Forcing recompile for ./Foundation.hs because of config/routes
Forcing recompile for ./Foundation.hs because of templates/default-layout-wrapper.hamlet
Forcing recompile for ./Foundation.hs because of templates/default-layout.hamlet
Forcing recompile for ./Handler/Home.hs because of templates/homepage.hamlet
Forcing recompile for ./Handler/Home.hs because of templates/homepage.julius
Forcing recompile for ./Handler/Home.hs because of templates/homepage.lucius
Rebuilding application... (using cabal)
Starting development server...
Starting devel application
Devel application launched: http://localhost:3000
stack exec -- yesod devel 127.0.0.1 - - [08/Oct/2015:21:43:13 -0500] "GET / HTTP/1.1" 200 - "" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"
127.0.0.1 - - [08/Oct/2015:21:43:13 -0500] "GET /static/css/bootstrap.css HTTP/1.1" 200 - "http://localhost:3000/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"
127.0.0.1 - - [08/Oct/2015:21:43:13 -0500] "GET /static/tmp/autogen-pGIQ-osA.css HTTP/1.1" 200 - "http://localhost:3000/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"
127.0.0.1 - - [08/Oct/2015:21:43:13 -0500] "GET /static/tmp/autogen-SWBGXCgb.js HTTP/1.1" 200 - "http://localhost:3000/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"
127.0.0.1 - - [08/Oct/2015:21:43:13 -0500] "GET /static/fonts/glyphicons-halflings-regular.woff HTTP/1.1" 200 - "http://localhost:3000/static/css/bootstrap.css?etag=QRP3qj9r" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"
127.0.0.1 - - [08/Oct/2015:21:43:13 -0500] "GET /favicon.ico HTTP/1.1" 200 1342 "http://localhost:3000/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"

[bitemyapp]

Thank you for your help!

[snoyberg]

This isn't a problem of system default, something very strange is happening
if the stack installed runghc isn't being found. I'm not even convinced
that --no-system-ghc will fix this, did you try it?

On Fri, Oct 9, 2015, 5:43 AM Chris Allen notifications@github.com wrote:

Closed #1125 #1125.

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Reply to this email directly or view it on GitHub
#1125 (comment).

[bitemyapp]

@snoyberg it wasn't using a Stack installed runghc, it was letting the system-installed GHC do its thing from /usr/bin. Setting system-ghc: false in config.yaml, running stack setup, and running the stack exec -- yesod devel fixed it.

[bitemyapp]

For science's sake, I turned the config flag back off.

[callen@chania ~/work/open-cis194 fuck-it]
$ stack exec -- yesod devel
Yesod devel server. Type 'quit' to quit
Application can be accessed at:

http://127.0.0.1:3000
https://127.0.0.1:3443
If you wish to test https capabilities, you should set the following variable:
  export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 51.2 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
ERROR: Yesod has been compiled with a different GHC version, please reinstall yesod-bin
yesod: ExitFailure 1
^C

[callen@chania ~/work/open-cis194 fuck-it]
$ stack --no-system-ghc exec -- yesod devel 
Yesod devel server. Type 'quit' to quit
Application can be accessed at:

http://127.0.0.1:3000
https://127.0.0.1:3443
If you wish to test https capabilities, you should set the following variable:
  export APPROOT=https://127.0.0.1:3443

Warning: The package list for 'hackage.haskell.org' is 51.2 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Configuring open-cis194-0.0.0...
Rebuilding application... (using cabal)
Starting development server...
Starting devel application
Devel application launched: http://localhost:3000

--no-system-ghc via config or argument passing appears to fix it.