From the Go specification [1]:
"1. For a nil slice, the number of iterations is 0."
`len` returns 0 if the slice is nil [2]. Therefore, checking
`len(v) > 0` before a loop is unnecessary.
[1]: https://go.dev/ref/spec#For_range
[2]: https://pkg.go.dev/builtin#len
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
I missed this during a refactor and there wasn't test coverage.
Instead of adding more heavy-weight integration tests, I tried
to use `gomock` here to assert on the options objects after CLI
flag parsing. I think with a few more helpers, this could be a
good way to get a lot more combinations covered without adding
a ton of slow E2E tests.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
The `alpha watch` command current "attaches" to an already-running
Compose project, so it's necessary to run something like
`docker compose up --wait` first.
Now, we'll do the equivalent of an `up --build` before starting the
watch, so that we know the project is up-to-date and running.
Additionally, unlike an interactive `up`, the services are not stopped
when `watch` exits (e.g. via `Ctrl-C`). This prevents the need to start
from scratch each time the command is run - if some services are already
running and up-to-date, they can be used as-is. A `down` can always be
used to destroy everything, and we can consider introducing a flag like
`--down-on-exit` to `watch` or changing the default.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
The big change here is to pass around an explicit `*BuildOptions` object
as part of Compose operations like `up` & `run` that may or may not do
builds. If the options object is `nil`, no builds whatsoever will be
attempted.
Motivation is to allow for partial rebuilds in the context of an `up`
for watch. This was broken and tricky to accomplish because various parts
of the Compose APIs mutate the `*Project` for convenience in ways that
make it unusable afterwards. (For example, it might set `service.Build = nil`
because it's not going to build that service right _then_. But we might
still want to build it later!)
NOTE: This commit does not actually touch the watch logic. This is all
in preparation to make it possible.
As part of this, a bunch of code moved around and I eliminated a bunch
of partially redundant logic, mostly around multi-platform. Several
edge cases have been addressed as part of this:
* `DOCKER_DEFAULT_PLATFORM` was _overriding_ explicitly set platforms
in some cases, this is no longer true, and it behaves like the Docker
CLI now
* It was possible for Compose to build an image for one platform and
then try to run it for a different platform (and fail)
* Errors are no longer returned if a local image exists but for the
wrong platform - the correct platform will be fetched/built (if
possible).
Because there's a LOT of subtlety and tricky logic here, I've also tried
to add an excessive amount of explanatory comments.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
This is a good place to start introducing (local) exclusivity
to Compose. Now, when `alpha watch` launches, it will check for
the existence of a PID file in the user XDG runtime directory,
and create one if the existing one is stale or does not exist.
If the PID file exists and is valid, an error is returned and
Compose exits.
A slight tweak to the experimental remote Git loader has been
made to use the XDG package for consistency.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
By default, `compose up` attaches to all services (i.e.
shows log output from every associated container). If
a service is specified, e.g. `compose up foo`, then
only `foo`'s logs are tailed. The `--attach-dependencies`
flag can also be used, so that if `foo` depended upon
`bar`, then `bar`'s logs would also be followed. It's
also possible to use `--no-attach` to filter out one
or more services explicitly, e.g. `compose up --no-attach=noisy`
would launch all services, including `noisy`, and would
show log output from every service _except_ `noisy`.
Lastly, it's possible to use `up --attach` to explicitly
restrict to a subset of services (or their dependencies).
How these flags interact with each other is also worth
thinking through.
There were a few different connected issues here, but
the primary issue was that running `compose up foo` was
always attaching dependencies regardless of `--attach-dependencies`.
The filtering logic here has been updated so that it
behaves predictably both when launching all services
(`compose up`) or a subset (`compose up foo`) as well
as various flag combinations on top of those.
Notably, this required making some changes to how it
watches containers. The logic here between attaching
for logs and monitoring for lifecycle changes is
tightly coupled, so some changes were needed to ensure
that the full set of services being `up`'d are _watched_
and the subset that should have logs shown are _attached_.
(This does mean faking the attach with an event but not
actually doing it.)
While handling that, I adjusted the context lifetimes
here, which improves error handling that gets shown to
the user and should help avoid potential leaks by getting
rid of a `context.Background()`.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
When building, if images are being pushed, ensure that only
named images (i.e. services with a populated `image` field)
are attempted to be pushed.
Services without `image` get an auto-generated name, which
will be a "Docker library" reference since they're in the
format `$project-$service`, which is implicitly the same as
`docker.io/library/$project-$service`. A push for that is
never desirable / will always fail.
The key here is that we cannot overwrite the `<svc>.image`
field when doing builds, as we need to be able to check for
its presence to determine whether a push makes sense.
Fixes#10813.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
* Move all the initialization code out of `main.go`
* Ensure spans are reported when there's an error with the
command
* Attach the Compose version & active Docker context to the
resource instead of the span
* Name the root CLI span `cli/<cmd>` for clarity and grab
the full subcommand path (e.g. `alpha-viz` instead of just
`viz`)
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
Do not set a hardcoded default timeout of 10 seconds when restarting / stopping but use the container `StopTimeout` (defaults to 10 seconds).
Also fixed custom timeout not used when invoking `up`.
Signed-off-by: Robbert Segeren <robbert.segeren@easyflex.nl>
This is a bunch of OTEL initialization code. It's all in
`internal/` because there are re-usable parts here, but Compose
isn't the right spot. Once we've stabilized the interfaces a bit
and the need arises, we can move it to a separate module.
Currently, a single span is produced to wrap the root Compose
command.
Compose will respect the standard OTEL environment variables
as well as OTEL metadata from the Docker context. Both can be
used simultaneously. The latter is intended for local system
integration and is restricted to Unix sockets / named pipes.
None of this is enabled by default. It requires setting the
`COMPOSE_EXPERIMENTAL_OTEL=1` environment variable to
gate it during development.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
Eng Zer Jun
Guillaume Lours
Nicolas De Loof
Matthew Walowski
Matthieu MOREL
Milas Bowman
Rory
relrelb
Ulysses Souza
robbert-ef