OSTree commands

# ostree CLI
man ostree
ostree --help

# create ostree repo
ostree --repo=repo init
tree -a

# add a file
mkdir -p rootfs && echo Hello > rootfs/hello.txt

# commit to the repo
ostree --repo=repo commit --branch=v1 --subject="image v1" rootfs/
tree -a repo/

# inspecting the repo
cat repo/refs/heads/v1
ostree --repo=repo show --raw <COMMIT>
ostree --repo=repo show --raw <DIRTREE>
ostree --repo=repo show --raw <DIRMETA>
ostree --repo=repo show --raw <FILE>
cat repo/objects/<FILE>

# listing a commit content
ostree --repo=repo ls v1

# checkout
rm -Rf rootfs/ && ls
ostree --repo=repo checkout v1 rootfs/ && tree rootfs

# same inode!
ls -li rootfs/hello.txt
ls -li repo/objects/<FILE_HASH>

# adding a full filesystem tree
rm -rf rootfs && mkdir rootfs && cd rootfs && tar xfv ~/workspace/talks/20210525-yocto-summit/ostree/rootfs.tar && cd ..
ostree --repo=repo commit --branch=v1 --subject="image v2" rootfs/
echo test=1 > rootfs/etc/conf.txt
ostree --repo=repo commit --branch=v1 --subject="image v3" rootfs/

# history
ostree --repo=repo refs
ostree --repo=repo log v1

# comparing
ostree --repo=repo diff commit2 commit3

# talk about other commands
ostree --help