[pacman-dev] The great VCS packages overhaul of 2015

[Thomas Bächler]

Am 13.03.2012 12:33, schrieb Allan McRae:
> The three cases I see as needing covered are:
> 
> 1) build from master HEAD
> 2) build from a branch HEAD
> 3) build from a given commit/tag
> 
> 
> What we need to find is the simplest way of allowing these  (and other
> reasonable suggestion that arises...).

My point was that from git's perspective, those are not different cases.
The only annoying thing is the origin/<ref> for branch names which we
need to get around somehow.

I will throw in another suggestion which should solve some of those
problems:

To get the source:

cd $vcsdir
git clone --mirror $url
 or
cd $vcsdir/$reponame
git fetch
cd $srcdir
GIT_DIR=$vcsdir/$reponame git archive --format=tar --prefix=$reponame/
$refspec | bsdtar -xf -

To get the version:

GIT_DIR=$vcsdir/$reponame git describe $refspec

Disadvantage:
- The "checkout" itself is not a git tree, so build() cannot use any git
commands (some projects use git commands internally in their Makefiles,
so this might be bad)

Advantage:
- Due to clone --mirror, we have all remote branch names as local branch
names, so we don't need to care whether $refspec is a branch name or
not. As we don't clone again, we don't lose those names.

That disadvantage is big (breaks kernel and syslinux git snapshot
versioning), so I am still not convinced.

My main point is: We must find a way to make sure we (==makepkg) don't
need to care about whether $refspec is a branch, tag or commit.

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