Re: [gentoo-scm] 'overlays' are altenatives to full tree clone

[Justin]

Donnie Berkholz schrieb:
> On 13:14 Sun 12 Apr     , Caleb Cushing wrote:
>> just so you know, you don't need the full tree to patch it. git
>> doesn't actually care if there's common history between 2 tree's when
>> you merge. I was planning on writing a tutorial for this for dev in
>> regen2 if anyone wants me to for here (since it sound like your w/
>> extra history) has some hugeness.
>
> Justin Lecher wrote up quick instructions about this, to preserve
> history when merging from the sci overlay to the main tree. I don't know
> if it's anywhere besides my inbox.
>

Attached the little script how I import things from git to git overlays. It basically works, but one
thing really could be optimized, preserving the directory structure. The way I do it with
--subdirectory-filter results in in a new repo where the root of the repo is the package dir. If
possible preserving the directory structure would be beneficial. There might be some tricks but this is
high-level git magic. This way I do it preserves the history of every file inside the package dir and
this is what we basically want.


#!/bin/bash -v
#git clone repoA
#git clone repoB
#cd repoA
#git fetch ../repoB master:repoB-merge
#git checkout repoB-merge
#git filter-branch --subdirectory-filter ${CATEGOY}/${PN} -- repoB-merge

if [[ -z $1 ]]; then
    exit
fi

CATPACK="${1}"
CAT="${1%\/*}"
PACK="${1#*\/}"


cd /data/local/science

git fetch /data/local/dberkholz master:"${CATPACK}"-import
git checkout "${CATPACK}"-import
rm -rf .git/refs/original
git filter-branch --subdirectory-filter ${CATPACK} -- "${CATPACK}"-import
git checkout master
git pull --no-commit . "${CATPACK}"-import
mkdir "${CATPACK}"
for i in ${PACK}* ChangeLog Manifest metadata.xml files; do
if [[ -e $i ]]; then
    git mv $i "${CATPACK}"/
fi
done