febb37a38e
This copies the github.com/moby/buildkit/util/appcontext
package as an internal package. The appcontext package from
BuildKit was the only remaining dependency on BuildKit, and
while we may need some of its functionality, the implementation
is not correct for how it's used in docker/cli (so would need
a rewrite).
Moving a copy of the code into the docker/cli (but as internal
package to prevent others from depending on it) is a first step
in that process, and removes the circular dependency between
BuildKit and the CLi.
We are only using these:
tree vendor/github.com/moby/buildkit
vendor/github.com/moby/buildkit
├── AUTHORS
├── LICENSE
└── util
└── appcontext
├── appcontext.go
├── appcontext_unix.go
├── appcontext_windows.go
└── register.go
3 directories, 6 files
Before this:
go mod graph | grep ' github.com/docker/cli'
github.com/moby/buildkit@v0.11.6 github.com/docker/cli@v23.0.0-rc.1+incompatible
After this:
go mod graph | grep ' github.com/docker/cli'
# (nothing)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
49 lines
851 B
Go
49 lines
851 B
Go
package appcontext
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import (
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"context"
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"os"
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"os/signal"
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"sync"
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"github.com/sirupsen/logrus"
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)
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var (
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appContextCache context.Context
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appContextOnce sync.Once
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)
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// Context returns a static context that reacts to termination signals of the
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// running process. Useful in CLI tools.
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func Context() context.Context {
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appContextOnce.Do(func() {
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signals := make(chan os.Signal, 2048)
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signal.Notify(signals, terminationSignals...)
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const exitLimit = 3
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retries := 0
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ctx := context.Background()
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for _, f := range inits {
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ctx = f(ctx)
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}
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ctx, cancel := context.WithCancel(ctx)
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appContextCache = ctx
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go func() {
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for {
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<-signals
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cancel()
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retries++
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if retries >= exitLimit {
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logrus.Errorf("got %d SIGTERM/SIGINTs, forcing shutdown", retries)
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os.Exit(1)
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}
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}
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}()
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})
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return appContextCache
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}
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