Re: Problem creating commits/trees with commit-tree/mktree

From: Shawn O. Pearce <spearce@spearce.org>
Date: Jan 11, 2010, 18:17 UTC
Message-ID: <20100111181712.GQ32155@spearce.org>
In-Reply-To: <f6d77fed1001111014g73a06923na05cd14d37968b04@mail.gmail.com>

Gavin Beatty <gavinbeatty@gmail.com> wrote:

Show 11 quoted lines

> I want to write commits to a branch without touching the index or
> having a checkout (for a git subcommand I'm writing).
> 
> I can create new blobs and trees but can't figure out how to commit a
> new tree/blob _with_ the old tree.
> 
> Currently, I do something a lot like:
> 
> objsha=$(echo 'contents' | git hash-object -w --stdin)
> objtreesha=$(printf "100644 blob $objsha\tfile.txt\000" | git mktree -z)
> newtreesha=$(printf "040000 tree $objtreesha\ttreefileisin\000" | git mktree -z)

You aren't feeding in the old tree contents as part of this command.

If you are really doing this via a script, you should look at git-fast-import. Its faster, and its language better supports this notion of editing an existing tree.

-- 
Shawn.