Commit Graph

87 Commits

Author SHA1 Message Date
Paulo Gomes 36fcdeeb5e
libgit2: fix access to nil t.stdin and improve observability
All errors that were previously not handled are now logged through
traceLog, to further help during transport investigations.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-30 14:44:41 +01:00
Paulo Gomes c84179088c Fixes regression accessing GitLab public repositories
Some git servers are more accommodating than others. Gitlab will try to
validate credentials when they are provided, even if they are empty and
the target repository is public, leading to a failed authentication error.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-30 10:50:40 +02:00
Paulo Gomes 92ad1f813b
Cache SSH connections
The underlying SSH connections are kept open and are reused
across several SSH sessions. This is due to upstream issues in
which concurrent/parallel SSH connections may lead to instability.

https://github.com/golang/go/issues/51926
https://github.com/golang/go/issues/27140
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-28 11:58:10 +01:00
Paulo Gomes 017707a71c
Improve managed transport observability
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-25 19:08:54 +00:00
Paulo Gomes 5091b69ad5
Force ssh.Dial timeout
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-25 19:08:52 +00:00
Paulo Gomes a860ebee04
Reuse HTTP connections in managed transport
Ensure all requests are completely processed and closed,
to prove odds of the underlying connections to be reused.

The transport now is pooled and reused whenever possible.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-25 19:08:51 +00:00
Paulo Gomes 45641b17c7 Fix dpanic issue when logging odd number of args
Info was receiving odd number of arguments leading to:
odd number of arguments passed as key-value pairs for logging

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-25 14:27:04 +01:00
Paulo Gomes 115040e9ea
Support redirects for libgit2 managed transport
For backwards compatibility, support for HTTP redirection is enabled when targeting
the same host, and no TLS downgrade took place.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes 43661dd15e
Enforce effective URL on error messages
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes d1a7e5d609
Fix race condition on httpSmartSubTransport
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes 822788b79e
Fix word casing
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes 4ed54bc359
Optimise basic auth for libgit2 managed transport
The initial implementation was based off upstream, which cause
an initial request to fail, and only then the credentials would
be added into the request.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes 24bc95e1d8
Add license headers
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes a000d8b859
Add tests for experimental libgit2 transport
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:21 +05:30
Paulo Gomes aa3288112e
Implement Managed Transport for libgit2
libgit2 network operations are blocking and do not provide timeout nor context capabilities,
leading for several reports by users of the controllers hanging indefinitely.

By using managed transport, golang primitives such as http.Transport and net.Dial can be used
to ensure timeouts are enforced.

Co-Authored-by: Sunny <darkowlzz@protonmail.com>
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-03-16 16:22:20 +05:30
Sunny b814070bc2 Fixes to gitrepo reconciler tests
NOTE: This should be amended with the previous commit which has
commented out tests.

Update reconcileSource() to work with the test case where no secret is
set. A minimal auth options is created and used for git checkout.

Update TestGitRepositoryReconciler_verifyCommitSignature() to use the
new git.Commit type.

Update TestGitRepositoryReconciler_reconcileSource_checkoutStrategy to
add skipForImplementation for branch commit test case.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2022-02-23 12:35:30 +01:00
Hidde Beydals eff40e22e9 git/libgit2: assert proper test of default branch
If there is no configuration set for `init.defaultBranch`, it does not
return an error but an empty string. We now take this into account so
we do not overwrite the default, and make the default `master` to match
with libgit2 defaults.

In addition, some comments have been added to not get confused about
what commits we are checking against.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2022-02-22 16:31:56 +01:00
Hidde Beydals 15c064abdf git/libgit2: set CheckoutForce on branch strategy
In the recent update from libgit2 1.1.x to 1.3.x, something seems to
have changed upstream. Resulting in the clone of a branch ending up
with a semi-bare file system state (in other words: without any files
present in the directory).

This commit patches the clone behavior to set the `CheckoutForce`
strategy as `CheckoutOption`, which mitigates the issue.

In addition, test cases have been added to ensure we do not run into
this again by asserting the state of the branch after cloning.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2022-02-22 16:31:56 +01:00
Paulo Gomes 8429708997
Upgrade libgit2 to libgit2-1.3.0-2
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-02-16 11:39:11 +00:00
Paulo Gomes e5d032fe9c
Add libgit2 checkout test with ED25519 key
This adds a test to detect any regression in libgit2's ED25519 key
support. go-git supports ED25519 but not the current version of
libgit2 used in flux. The updates to libgit2 in v1.2.0 adds support
for ED25519. This test would help ensure the right version of libgit2
is used.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-02-16 10:17:32 +00:00
Paulo Gomes f44302eed0
Bump libgit2 to 1.3.0 and git2go to V33.
Downstream breaking changes introduced since git2go@V31:
- git2go.ErrorCode was deprecated in favour of the native error type.
- FetchOptions no longer expects a pointer, but rather the actual value of git2go.FetchOptions.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-02-16 10:17:31 +00:00
Sunny 649d33ca37
pkg/git: Include commit message and URL in error
go-git: Include the commit message in the returned commit object.
libgit2: Set the URL in the checkout error.

Add new method Commit.ShortMessage() for returning short commit
message.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2022-02-14 21:34:27 +05:30
Paulo Gomes 9479d04779
Fix host mismatch in libgit2
Depending on libgit2 version or from its dependencies, the hostname may or may not contain ports

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>
2022-01-26 17:25:18 +00:00
Robert Clarke 3d276b679b libgit2: Configured libgit2 clone ProxyOptions
This configures ProxyOptions for all libgit2 Checkout functions when
cloning and configures the options based on current environment
settings using the git2go.ProxyTypeAuto option.

Refs: #131
Signed-off-by: Robert Clarke <rob@robertandrewclarke.com>
Co-authored-by: Aurélien GARNIER <aurelien.garnier@atos.net>
2022-01-18 19:35:47 +00:00
Kevin McDermott 4029241b3b Don't assume master is the default branch.
This introduces a quick lookup of the default branch rather than
assuming "master".

Signed-off-by: Kevin McDermott <kevin@weave.works>
2022-01-17 14:25:05 +00:00
Hidde Beydals ab089ddb07 libgit2: use `bytes.Equal` instead of `.Compare`
Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-11-23 09:51:44 +01:00
Hidde Beydals cc71517ed3 tests: ensure proper garbage collection
- Ensure the proper path is garbage collected for libgit2 repositories,
  as the `Path` method on the repository object returns the `.git`
  directory, and not the root path.
- Ensure the Helm test server does not get swapped during tests,
  with as side-effect that no obsolete temporary directories remain.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-11-16 10:39:58 +01:00
Sunny 68a3ea2e4d Add tests for libgit2 remote callbacks
- Adds tests for the libgit2 remote callbacks
- Adds tests for CheckoutStrategyForImplementation with context timeout
  and verify timeout is respected by both the git implementations.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-11-04 16:17:23 +05:30
Sunny 65e5c6a686 libgit2: Add more RemoteCallbacks
Add SidebandProgressCallback to be able to cancel the network operation
before any transfer operation.
Add PushTransferProgressCallback to be able to cancel the push transfer
operation.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-11-04 16:17:23 +05:30
Sunny d407c824d6 libgit2: Add early return to transferProgressCallback
In transferProgressCallback(), if the received objects is equal to the
total objects, return early with OK.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-11-04 16:17:23 +05:30
Hidde Beydals afa82bbc7a libgit2: ensure context timeout cancels transfer
With the information from the refactor still fresh in mind, I continue
to find new paths now I mentally tamed the git2go beast.

`libgit2` seems to assume that a transport will eventually tell by
itself that it has timed out. This also means that at present any
timeout configuration does not seem have an effect. It will continue
to transfer until the remote (or _something_ else) tells it is no
longer transfering.

This commit introduces a simple check (without tests) which was used
to confirm the theory in combination with the tests in
`pkg/git/strategy` (by setting it to a very low timeout and observing
it fail).

A future iteration should probably take the data given to the callback
into account to ensure it doesn't error out if the given data[1]
reports it has successfully received all objects. Another candidate
for this check may be `CompletionCallback`, but one should study the
C code (and likely some Go code as well) before this.

In addition, to ensure the same timeout is taken into account for push
operations, `PushTransferProgressCallback` may require a likewise
helper.

[1]: https://github.com/libgit2/git2go/blob/main/remote.go#L50-L58

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-11-04 16:17:23 +05:30
Sunny 10d262032c libgit2: handle EOF in parseKnownHosts()
parseKnownHosts() uses golang.org/x/crypto/ssh's ParseKnownHosts() for
parsing known hosts. It returns EOF error when the input is not a host
public key, but a valid known_hosts content, like a comment line.

With this fix, lines causing EOF error are skipped and the parsing of
the known_hosts file continues. But invalid lines still cause parsing
failure.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-28 17:35:46 +05:30
Sunny a7f2e870bf transportAuth(): Add checks for invalid transports
Update GitRepositoryReconciler to use a nil authOpts unless it's
configured.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-27 16:59:26 +05:30
Sunny f9a34045e1 Update gittestserver
New gittestserver fixes the issue with custom branch in an
initialized repo.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-27 00:43:31 +05:30
Sunny 5bd08a6960 Add Host field check in AuthOptions.Validate()
For ssh, Host field is required in AuthOptions.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-27 00:43:31 +05:30
Sunny 562af6d658 Add git.CheckoutStrategy SemVer checkout tests
Adds tests for git.CheckoutStrategy to check if both the git
implementations follow the same SemVer tag selection rules.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-27 00:43:31 +05:30
Hidde Beydals 99428f593e libgit2: change credentialsCallback logic
This changes the logic of `credentialsCallback` so that it takes the
`allowedTypes` passed on by `git2go` into account. Reason for this
change is because this prepares it to work with `v33`, but also
because it can provide better guidance when `libgit2` has been
compiled with a different configuration, which e.g. doesn't
allow for "in-memory SSH keys".

Because `AuthOptions#Identity` now gets validated by the callback
and go-git does its own validaiton, the check has been removed
from `Validate` (and now does a simple check if the fields are set).

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals 7a5d8b116d git: styling nitpicks
Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals c814e0fa26 git: remove ', error:' from returned error
As we properly nest errors.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Sunny 8c581ddfbc Add git.CheckoutStrategy auth tests
Adds tests for git.CheckoutStrategy to check if both the git
implementations work with all the authentication methods.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-27 00:43:31 +05:30
Sunny 942c310195 pkg/git: AuthOptions.Validate() test improvements
Adds more test cases for Validate() and an error for unknown transport.

Signed-off-by: Sunny <darkowlzz@protonmail.com>
2021-10-27 00:43:31 +05:30
Hidde Beydals 4a23126c6a libgit2: make RemoteCallbacks helper public
Main requirement for this is the image-automation-controller
depending on being able to get a working auth configuration.

Once the package is moved, we should add push logic to it,
so that the controller is able to use that instead.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals b7376ce94c gogit: allow checkout of commit without branch
This commit changes the `gogit` behavior for commit checkouts,
now allowing one to reference to just a commit while omitting any
branch reference. Doing this creates an Artifact with a
`HEAD/<commit>` revision.

If both a `branch` and `commit` are defined, the commit is expected
to exist within the branch. This results in a more efficient clone
of just the target branch, and also makes this change backwards
compatible.

Fixes #407
Fixes #315

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals 5a1fcc213b git: standardise commit and (PGP) verification
This commit refactors the previous `Commit` interface into a
standardised `Commit` struct. This object contains sufficient
information for referencing, observating and (PGP) verification.

- `libgit2` commit checkout does now return `HEAD/<SHA1>` as
  the branch is not taken into account.
- `git2go` objects are now properly `Free`d everywhere
- `Verify` logic is tested.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals 80b9807550 gogit: add CheckoutStrategy tests
Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals 0cf0d4e756 git: refactor AuthStrategy into AuthOptions
This commit moves the previous `AuthStrategy` wiring to a more generic
`AuthOptions`, breaking free from implementation specific details in
the `git` package.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-27 00:43:31 +05:30
Hidde Beydals 9ff5334688 go-git: ensure original tag is used for TS lookup
Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-22 13:25:24 +02:00
Hidde Beydals 4c94f88ebb libgit2: ensure original tag is used for TS lookup
This adds an additional selection candidate, to ensure test flakiness
happens more often.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-22 13:19:34 +02:00
Hidde Beydals 56201f30fe libgit2: Free most objects
This commit ensures most of the `git2go` objects `Free` themselves from
the underlying C object.

Ensuring all objects are freed is not possible yet, due to the way
commits are wired in to facilitate verification later on. In a later
follow up, we should change this and e.g. validate as part of the
checkout process, and move the implementation specific authentication
configuration from `git` into `libgit2`.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-22 12:01:45 +02:00
Hidde Beydals d9473d008c libgit2: add remaining checkout strategy tests
This commit is a follow up on 4dc3185c5f
and adds tests for the remaining checkout strategies, while
consolidating some of the logic.

The consolidated logic ensures that (SemVer) tag and commit checkouts
happen using the same "checkout detached HEAD" logic.
The branch checkout is left unmodified, and simply checks out at the
current HEAD of the given branch.

Signed-off-by: Hidde Beydals <hello@hidde.co>
2021-10-22 12:01:41 +02:00