[GHC] #15538: GHC boot script can't handle Git remote not named origin

[GHC]

#15538: GHC boot script can't handle Git remote not named origin
-------------------------------------+-------------------------------------
        Reporter:  ChaiTRex          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Build System      |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Description changed by ChaiTRex:

Old description:

> == Problemorf
>
> I ran the following to get the sources for GHC to build them:
>
> {{{
> git clone -o ghc --recursive http://git.haskell.org/ghc.git
> }}}
>
> Note especially the `-o ghc` part, which uses the Git remote name `ghc`
> instead of the default `origin`. When a custom remote name is used,
> `./boot` fails:
>
> {{{
> $ ./boot
> Traceback (most recent call last):
>   File "./boot", line 193, in <module>
>     check_for_url_rewrites()
>   File "./boot", line 29, in check_for_url_rewrites
>     subprocess.check_output('git config
> remote.origin.url'.split()).find(b'github.com') != -1 and \
>   File "/usr/lib/python3.5/subprocess.py", line 626, in check_output
>     **kwargs).stdout
>   File "/usr/lib/python3.5/subprocess.py", line 708, in run
>     output=stdout, stderr=stderr)
> subprocess.CalledProcessError: Command '['git', 'config',
> 'remote.origin.url']' returned non-zero exit status 1
>
> $ git config remote.origin.url
>
> $ echo $?
> 1
> }}}
>
> == Solution
>
> `git config remote.origin.url` can be used first. Whenever `git config
> remote.origin.url` fails, a `git rev-parse` command (thanks to
> freenode/#git/_ikke_ for it) can be used to get the remote name and
> branch that would be pushed to:
>
> {{{
> $ git rev-parse --symbolic-full-name --abbrev-ref @{upstream}
> ghc/coercible
>
> $ git rev-parse --symbolic-full-name --abbrev-ref @{upstream} | sed
> 's/\/.*$//'
> ghc
>
> $ git config "remote.$( git rev-parse --symbolic-full-name --abbrev-ref
> @{upstream} | sed 's/\/.*$//' ).url"
> http://git.haskell.org/ghc.git
> }}}
>
> == Workaround
>
> Rename the remote to `origin`:
>
> {{{
> $ git remote rename "$( git config branch.master.remote )" origin
> $ ./boot
> Creating libraries/mtl/ghc.mk
> Creating libraries/unix/ghc.mk
> Creating libraries/text/ghc.mk
> ⋮
> }}}

New description:

 == Problem

 I ran the following to get the sources for GHC to build them:

 {{{
 git clone -o ghc --recursive http://git.haskell.org/ghc.git
 }}}

 Note especially the `-o ghc` part, which uses the Git remote name `ghc`
 instead of the default `origin`. When a custom remote name is used,
 `./boot` fails:

 {{{
 $ ./boot
 Traceback (most recent call last):
   File "./boot", line 193, in <module>
     check_for_url_rewrites()
   File "./boot", line 29, in check_for_url_rewrites
     subprocess.check_output('git config
 remote.origin.url'.split()).find(b'github.com') != -1 and \
   File "/usr/lib/python3.5/subprocess.py", line 626, in check_output
     **kwargs).stdout
   File "/usr/lib/python3.5/subprocess.py", line 708, in run
     output=stdout, stderr=stderr)
 subprocess.CalledProcessError: Command '['git', 'config',
 'remote.origin.url']' returned non-zero exit status 1

 $ git config remote.origin.url

 $ echo $?
 1
 }}}

 == Solution

 `git config remote.origin.url` can be used first. Whenever `git config
 remote.origin.url` fails, a `git rev-parse` command (thanks to
 freenode/#git/_ikke_ for it) can be used to get the remote name and branch
 that would be pushed to:

 {{{
 $ git rev-parse --symbolic-full-name --abbrev-ref @{upstream}
 ghc/coercible

 $ git rev-parse --symbolic-full-name --abbrev-ref @{upstream} | sed
 's/\/.*$//'
 ghc

 $ git config "remote.$( git rev-parse --symbolic-full-name --abbrev-ref
 @{upstream} | sed 's/\/.*$//' ).url"
 http://git.haskell.org/ghc.git
 }}}

 == Workaround

 Rename the remote to `origin`:

 {{{
 $ git remote rename "$( git config branch.master.remote )" origin
 $ ./boot
 Creating libraries/mtl/ghc.mk
 Creating libraries/unix/ghc.mk
 Creating libraries/text/ghc.mk
 ⋮
 }}}

--

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15538#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler