From: Alexandr Miloslavskiy <email@example.com> To: firstname.lastname@example.org Cc: email@example.com, firstname.lastname@example.org, Marc Strapetz <email@example.com> Subject: Questions about partial clone with '--filter=tree:0' Date: Tue, 20 Oct 2020 19:09:36 +0200 Message-ID: <firstname.lastname@example.org> (raw) This is a edited copy of message I sent 2 weeks ago, which unfortunately didn't receive any replies. I tried to make make it shorter this time :) ---- We are implementing a git UI. One interesting case is the repository cloned with '--filter=tree:0', because it makes it a lot harder to run basic git operations such as file log and blame. The problems and potential solutions are outlined below. We should be able to make patches for (2) and (3) if it makes sense to patch these. (1) Is it even considered a realistic use case? ----------------------------------------------- Summary: is '--filter=tree:0' a realistic or "crazy" scenario that is not considered worthy of supporting? I decided to use Linux repo, which is reasonably large, and it seems that '--filter=tree:0' could be desired because it helps with disk space (~0.66gb) and network (~0.54gb): https://github.com/torvalds/linux.git 951025 commits total. git clone --bare <url> 7'624'042 objects 2.86gb network 3.10gb disk git clone --bare --filter=blob:none <url> 5'484'714 (71.9%) objects 1.01gb (35.3%) network 1.16gb (37.4%) disk git clone --bare --filter=tree:0 <url> 951'693 (12.5%) objects 0.47gb (16.4%) network 0.50gb (16.1%) disk git clone --bare --depth 1 --branch master <url> 74'380 ( 0.9%) objects 0.19gb ( 6.6%) network 0.19gb ( 6.1%) disk (2) A command to enrich repo with trees --------------------------------------- There is no good way to "un-partial" repository that was cloned with '--filter=tree:0' to have all trees, but no blobs. There seems to be a dirty way of doing that by abusing 'fetch --deepen' which happens to skip "ref tip already present locally" check, but it will also re-download all commits, which means extra ~0.5gb network in case of Linux repo. (3) A command to download ALL trees and/or blobs for a subpath ----------------------------------------------- Summary: Running a Blame or file log in '--filter=tree:0' repo is currently very inefficient, up to a point where it can be discussed as not really working. The suggested command will be able to accept a path and download ALL trees and/or blobs that match it. This will solve many problems at once: * Solve (2) * Make it possible to prepare for efficient blame and file log * Make a new experience with super-mono-repos, where user will now be able to only download a part of it by path. Currently '--filter=sparse:oid' is there to support that, but it is very hard to use on client side, because it requires paths to be already present in a commit on server. For a possible solution, it sounds reasonable to have such filter: --filter=sparse:pathlist=/1/2' Path list could be delimited with some special character, and paths themselves could be escaped.
next reply index Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-10-20 17:09 Alexandr Miloslavskiy [this message] 2020-10-20 22:29 ` Taylor Blau 2020-10-21 17:10 ` Alexandr Miloslavskiy 2020-10-21 17:31 ` Taylor Blau 2020-10-21 17:46 ` Alexandr Miloslavskiy 2020-10-26 18:24 ` Jonathan Tan 2020-10-26 18:44 ` Alexandr Miloslavskiy 2020-10-26 19:46 ` Jonathan Tan 2020-10-26 20:08 ` Alexandr Miloslavskiy
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --email@example.com \ --firstname.lastname@example.org \ --email@example.com \ --firstname.lastname@example.org \ --email@example.com \ --firstname.lastname@example.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
Git Mailing List Archive on lore.kernel.org Archives are clonable: git clone --mirror https://lore.kernel.org/git/0 git/git/0.git # If you have public-inbox 1.1+ installed, you may # initialize and index your mirror using the following commands: public-inbox-init -V2 git git/ https://lore.kernel.org/git \ email@example.com public-inbox-index git Example config snippet for mirrors Newsgroup available over NNTP: nntp://nntp.lore.kernel.org/org.kernel.vger.git AGPL code for this site: git clone https://public-inbox.org/public-inbox.git