Repo, Bitbake

Repo

Repo complements Git by simplifying work across multiple repositories.
From https://source.android.com/docs/setup/create/repo

基本语法

repo <command options>

content	command
Help	Repo help
Command Help	Repo <command> --help
init	Repo init -u url [options]
sync	Repo sync <project-list>
upload	Repo upload <project-list>
Check diff	Repo diff
download	Repo download <target change>
forall	Repo forall <project-list> -c command
check all repos status	repo status

sync

• If the project has never been synchronized, then repo sync is equivalent to git clone. All branches in the remote repository are copied to the local project directory.
• If the project has been synchronized before, then repo sync is equivalent to:
  git remote update
  git rebase origin/branch

sync

repo sync -c -j$(nproc) && repo forall -c "git-lfs pull"

clean

repo forall -c "git reset --hard HEAD && git clean -df"; repo sync -d -j$(nproc); repo forall -c "git lfs pull"
如果sync不完整，或者之前的code残留一些patch，可能会出现lunch的时候报错no such devices or directory，重复执行sync和clean的步骤即可

报错no such devices or directory还有一种很大的可能的lunch target写错了，检查一下，尤其是_和-

如何根据现有的manifest sync

1. 将manifest下载到.repo/manifests下面
2. repo sync -m <yourmanifets>，不需要指定路径
3. 正常repo sync, source, lunch, make即可

为什么git log可能日期更早的反而在上面

因为在lunch这一步打了以前的patch

repo报错

repo: reusing existing repo client checkout in xxx manifests: fatal: couldn't find remote ref refs/heads/master manifests: sleeping 4.0 seconds before retrying fatal: cannot obtain manifest xxxxx ================================================================================ Repo command failed: UpdateManifestError Unable to sync manifest default.xml
后来发现这个连接可以打开，但是没有master只有main分支，就在repo init后加上-b main即可，因为默认是master

Bitbake

If you ever get yourself into trouble, or find that a particular recipe is in a bad state, check out the bitbake cleanstate <recipe> and bitbake cleanall <recipe> commands.