Commit Briefs

fd7552d245 Mark Jamsek

implement support for keywords as got <commit> arguments

This begins enabling the use of keywords in got wherever commit ids or references are used, with more work intended to expand support across all such instances (e.g., branch, checkout, etc.), and add more keywords. The keywords ":base" and ":head" can be passed to 'got {diff,log,update} -c' commands as a substitute for the corresponding commit hash id. Keywords and references can also be modified by appending a ':+' or ':-' and an optional integer N to specify by first parent traversal the Nth generation descendant or antecedent, respectively. If N is omitted, a '1' is implicitly appended. tweaks + ok op and stsp



2f43cd698e Stefan Sperling

remove dependency of gitwrapper, gotctl, and gotsh on object_parse.c

Move some functions from object_parse.c into hash.c. These functions either require hash.c code anyway or contain object ID implementation internals. Add a new file object_qid.c, for got_object_id_queue and got_object_qid. This new file must be linked to virtually every program.


53bf0b5419 Omar Polo

rename lib/sha1.c to lib/hash.c

It will soon grow functions to deal with sha256 too. stsp@ agrees.


13b2bc374c Stefan Sperling

introduce gotd(8), a Git repository server reachable via ssh(1)

This is an initial barebones implementation which provides the absolute minimum of functionality required to serve got(1) and git(1) clients. Basic fetch/send functionality has been tested and seems to work here, but this server is not yet expected to be stable. More testing is welcome. See the man pages for setup instructions. The current design uses one reader and one writer process per repository, which will have to be extended to N readers and N writers in the future. At startup, each process will chroot(2) into its assigned repository. This works because gotd(8) can only be started as root, and will then fork+exec, chroot, and privdrop. At present the parent process runs with the following pledge(2) promises: "stdio rpath wpath cpath proc getpw sendfd recvfd fattr flock unix unveil" The parent is the only process able to modify the repository in a way that becomes visible to Git clients. The parent uses unveil(2) to restrict its view of the filesystem to /tmp and the repositories listed in the configuration file gotd.conf(5). Per-repository chroot(2) processes use "stdio rpath sendfd recvfd". The writer defers to the parent for modifying references in the repository to point at newly uploaded commits. The reader is fine without such help, because Git repositories can be read without having to create any lock-files. gotd(8) requires a dedicated user ID, which should own repositories on the filesystem, and a separate secondary group, which should not have filesystem-level repository access, and must be allowed access to the gotd(8) socket. To obtain Git repository access, users must be members of this secondary group, and must have their login shell set to gotsh(1). gotsh(1) connects to the gotd(8) socket and speaks Git-protocol towards the client on the other end of the SSH connection. gotsh(1) is not an interactive command shell. At present, authenticated clients are granted read/write access to all repositories and all references (except for the "refs/got/" and the "refs/remotes/" namespaces, which are already being protected from modification). While complicated access control mechanism are not a design goal, making it possible to safely offer anonymous Git repository access over ssh(1) is on the road map.


301e83b358 Stefan Sperling

move privsep code from pack_create.c into new file pack_create_privsep.c

Needed by future gotd(8). ok op@



6a80080453 Stefan Sperling

move code for reading Git's config file into new file read_gitconfig_privsep.c

The end goal here is to remove the dependency of repository.c on privsep.c during compilation.


8e359fa0dc Stefan Sperling

move functions which open objects into new file object_open_privsep.c

For the future, this will make it possible to provide alternative implementations of functions now stored in object_open_privsep.c. This will probably be needed by future gotd(8) which runs inside a chroot(2) environment and without the "exec" pledge(2) promise, making it impossible to run libexec helpers on the fly. Details of this design are not yet settled, but moving functions into a separate compilation unit won't hurt in any case.


4d5ee9564a Josh Rickmar

create and verify tags signed by SSH keys

This adds a new -s flag to 'got tag' that specifies the signer identity (for example, a key file) of the tagger. The tag object will include a signature that validates each of the tag object headers and the tag message. Verifying these signed tags requires maintaining an allowed signers file which maps signer identities (i.e. the email address of the tagger) to SSH public keys. See ssh-keygen(1) for more details of the allowed signers file. After creating this file and providing the path to it in got.conf(5) using the allowed_signers option, tags may be verified using with 'got tag -V tag_name'. The return code will be non-zero if a signature fails to verify. ok stsp@



211cfef0b2 Stefan Sperling

use time-based rate-limiting for gotadmin progress output

Suggested by naddy some time ago. ok tracey


7d69d862a0 Stefan Sperling

let gotadmin find the repository automatically if invoked in a work tree

Move a small amount of code from worktree.c to a new file worktree_open.c, which contains everything required to open and close a work tree and inspect some of its basic parameters. This can be used by gotadmin. ok tracey


b343c297c6 Stefan Sperling

use a bloom filter to avoid pointless pack index searches


321a74a5ca Christian Weisgerber

garbage-collect unused "dist" target from subdirectory Makefiles

ok stsp


d65a88a2f0 Stefan Sperling

move duplicated dial_ssh() and dial_git() functions into a common file

These functions are used by 'got send' and 'got fetch' in order to open network connections to a server. Move them into new file lib/dial.c and declare relevant functions in got_dial.h and lib/got_lib_dial.h. No functional change.


f8a36e2210 Stefan Sperling

add 'got send' command for sending changes to remote repositories

Known to work against git-daemon and github Git server implementations. Tests by abieber, naddy, jrick, and myself. Man page additions reviewed by Lucas.


fe621944e8 Stefan Sperling

merge new diff implementation from the git.gameoftrees.org diff.git repository

This new diff implementation was started by Neels Hofmeyr during the u2k20 hackathon and now replaces diffreg.c code lifted from the OpenBSD base system. The integration of this code into Got was done by me. Got now uses the patience diff algorithm by default. The diff.git repository will remain the primary repository for the diff code, which already compiles and runs on other operating systems such as Linux. Any fixes and improvements for files inherited from the diff.git repository should be written against that repository and synced to got.git afterwards.


0f43fed90b Stefan Sperling

add got.conf(5) to MAN list in Makefile




ab2f42e760 Stefan Sperling

cache delta data buffers in an LRU cache