[pacman-dev] [PATCH] Add the ability to always build from the repo's HEAD

[郑文辉(Techlive Zheng)]

2013/5/28 Allan McRae <allan at archlinux.org>:
> On 28/05/13 15:07, 郑文辉(Techlive Zheng) wrote:
>> 2013/5/28 Allan McRae <allan at archlinux.org>:
>>> On 28/05/13 14:29, 郑文辉(Techlive Zheng) wrote:
>>>> 2013/5/28 Allan McRae <allan at archlinux.org>:
>>>>> On 28/05/13 02:08, Techlive Zheng wrote:
>>>>>> ---
>>>>>>  A task has also been added:
>>>>>>
>>>>>>   https://bugs.archlinux.org/task/35499
>>>>>
>>>>>
>>>>> Am I missing something completely here?  Does not specifying "ref=" etc
>>>>> in the URL build from HEAD?
>>>> Noop, "branch=HEAD' won't work, git clone --mirror will set the 'HEAD'
>>>> ref correctly, but next time, 'git fetch' won't.
>>>
>>> Does just specifying the URL not do what you want?  e.g.
>>>
>>> source=('git://projects.archlinux.org/pacman.git')
>>>
>> Yes, you are right, there is no need to introduce a "HEAD"  fragment,
>> but the later hack for 'git fetch' is necessary, otherwise, the HEAD
>> won't get update in a 'git fetch'.
>
>
> Explain to me as though I am incredibly stupid.  Because I have no idea
> what is actually wrong.   Everything updates fine here:
>
>
> allan at arya /var/abs/local/toolchain/glibc-git
> $ grep source PKGBUILD
> source=(git://sourceware.org/git/glibc.git
>
>
> allan at arya /var/abs/local/toolchain/glibc-git/glibc (BARE:master)
> $ cat HEAD
> ref: refs/heads/master
>
>
> allan at arya /var/abs/local/toolchain/glibc-git/glibc (BARE:master)
> $ git show-ref --head | grep refs/heads/master
> 5d5ef5dbfc5be7aec31e5d33d28b2e93dc4b8a8d refs/heads/master
>
>
> allan at arya /var/abs/local/toolchain/glibc-git
> $ makepkg
> ==> Making package: glibc 2.17_637_g8de398d-1 (Tue May 28 15:16:39 EST 2013)
> ==> Checking runtime dependencies...
> ==> Checking buildtime dependencies...
> ==> Retrieving sources...
>   -> Updating glibc git repo...
> ...
>
>
> allan at arya /var/abs/local/toolchain/glibc-git/glibc (BARE:master)
> $ git show-ref --head | grep refs/heads/master
> 528c24058fb100fb27fe5c211b92be84c67a6659 refs/heads/master
>
>
Try this:

1. set the git source of your PKGBUILD to a local repo

> $ grep source PKGBUILD
> source=(git+file:///path/to/some/local/repo)

2.  check the local repo's HEAD
> $ cd /path/to/some/local/repo
> $ git rev-parse HEAD
> 123456789                #say this is the current commit hash of the HEAD

3. run makepkg, and check the local abs copy of this repo
> $ makepkg
> $ cd /path/to/the/local/copy/of/the/repo                    #this is directory does not exist until the makepkg, and created by makepkg by 'git clone --mirror'
> $ git rev-parse HEAD
> 123456789               # yes, same as the original HEAD, no problem now

4. change the HEAD of the original repo
> $ cd /path/to/some/local/repo
> $ git co HEAD~
> $ git rev-parse HEAD
> 987654321                #not he commit hash of the HEAD has been changed

5. run makepkg again, and check again the local abs copy of the repo
> $ makepkg
> $ cd /path/to/the/local/copy/of/the/repo                    #this is directory is preserved since last makepkg, and updated by makepkg using 'git fetch --all'
> $ git rev-parse HEAD
> 123456789               # noop, the commit HASH of the HEAD is still the old one, not updated