remove buildkit as dependency

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>

cmd/docker/docker.go

@@ -13,8 +13,8 @@ import (
 	"github.com/docker/cli/cli/command/commands"
 	cliflags "github.com/docker/cli/cli/flags"
 	"github.com/docker/cli/cli/version"
+	"github.com/docker/cli/cmd/docker/internal/appcontext"
 	"github.com/docker/docker/api/types/versions"
-	"github.com/moby/buildkit/util/appcontext"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"

cmd/docker/internal/appcontext/appcontext.go

@@ -9,8 +9,10 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-var appContextCache context.Context
+var (
-var appContextOnce sync.Once
+	appContextCache context.Context
+	appContextOnce  sync.Once
+)
 
 // Context returns a static context that reacts to termination signals of the
 // running process. Useful in CLI tools.

vendor.mod

@@ -23,7 +23,6 @@ require (
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/mattn/go-runewidth v0.0.14
 	github.com/mitchellh/mapstructure v1.3.2
-	github.com/moby/buildkit v0.11.6
 	github.com/moby/patternmatcher v0.6.0
 	github.com/moby/swarmkit/v2 v2.0.0-20230713153928-bc71908479e5
 	github.com/moby/sys/sequential v0.5.0

vendor.sum

@@ -164,8 +164,6 @@ github.com/miekg/pkcs11 v1.1.1/go.mod h1:XsNlhZGX73bx86s2hdc/FuaLm2CPZJemRLMA+WT
 github.com/mitchellh/mapstructure v1.0.0/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.3.2 h1:mRS76wmkOn3KkKAyXDu42V+6ebnXWIztFSYGN7GeoRg=
 github.com/mitchellh/mapstructure v1.3.2/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
-github.com/moby/buildkit v0.11.6 h1:VYNdoKk5TVxN7k4RvZgdeM4GOyRvIi4Z8MXOY7xvyUs=
-github.com/moby/buildkit v0.11.6/go.mod h1:GCqKfHhz+pddzfgaR7WmHVEE3nKKZMMDPpK8mh3ZLv4=
 github.com/moby/patternmatcher v0.6.0 h1:GmP9lR19aU5GqSSFko+5pRqHi+Ohk1O69aFiKkVGiPk=
 github.com/moby/patternmatcher v0.6.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
 github.com/moby/swarmkit/v2 v2.0.0-20230713153928-bc71908479e5 h1:o6x+wIX1vKD0kJlEqe8M9TLIe0SK8lnGcA6XoJtaFqg=
@@ -277,18 +275,18 @@ go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.29.0/go.mod h1:
 go.opentelemetry.io/otel v1.4.0/go.mod h1:jeAqMFKy2uLIxCtKxoFj0FAL5zAPKQagc3+GtBWakzk=
 go.opentelemetry.io/otel v1.4.1 h1:QbINgGDDcoQUoMJa2mMaWno49lja9sHwp6aoa2n3a4g=
 go.opentelemetry.io/otel v1.4.1/go.mod h1:StM6F/0fSwpd8dKWDCdRr7uRvEPYdW0hBSlbdTiUde4=
-go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.4.1 h1:imIM3vRDMyZK1ypQlQlO+brE22I9lRhJsBDXpDWjlz8=
+go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.3.0 h1:R/OBkMoGgfy2fLhs2QhkCI1w4HLEQX92GCcJB6SSdNk=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.4.1 h1:WPpPsAAs8I2rA47v5u0558meKmmwm1Dj99ZbqCV8sZ8=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.3.0 h1:giGm8w67Ja7amYNfYMdme7xSp2pIxThWopw8+QP51Yk=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.4.1 h1:8qOago/OqoFclMUUj/184tZyRdDZFpcejSjbk5Jrl6Y=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.3.0 h1:Ydage/P0fRrSPpZeCVxzjqGcI6iVmG2xb43+IR8cjqM=
 go.opentelemetry.io/otel/internal/metric v0.27.0 h1:9dAVGAfFiiEq5NVB9FUJ5et+btbDQAUIJehJ+ikyryk=
 go.opentelemetry.io/otel/internal/metric v0.27.0/go.mod h1:n1CVxRqKqYZtqyTh9U/onvKapPGv7y/rpyOTI+LFNzw=
 go.opentelemetry.io/otel/metric v0.27.0 h1:HhJPsGhJoKRSegPQILFbODU56NS/L1UE4fS1sC5kIwQ=
 go.opentelemetry.io/otel/metric v0.27.0/go.mod h1:raXDJ7uP2/Jc0nVZWQjJtzoyssOYWu/+pjZqRzfvZ7g=
-go.opentelemetry.io/otel/sdk v1.4.1 h1:J7EaW71E0v87qflB4cDolaqq3AcujGrtyIPGQoZOB0Y=
+go.opentelemetry.io/otel/sdk v1.3.0 h1:3278edCoH89MEJ0Ky8WQXVmDQv3FX4ZJ3Pp+9fJreAI=
 go.opentelemetry.io/otel/trace v1.4.0/go.mod h1:uc3eRsqDfWs9R7b92xbQbU42/eTNz4N+gLP8qJCi4aE=
 go.opentelemetry.io/otel/trace v1.4.1 h1:O+16qcdTrT7zxv2J6GejTPFinSwA++cYerC5iSiF8EQ=
 go.opentelemetry.io/otel/trace v1.4.1/go.mod h1:iYEVbroFCNut9QkwEczV9vMRPHNKSSwYZjulEtsmhFc=
-go.opentelemetry.io/proto/otlp v0.12.0 h1:CMJ/3Wp7iOWES+CYLfnBv+DVmPbB+kmy9PJ92XvlR6c=
+go.opentelemetry.io/proto/otlp v0.11.0 h1:cLDgIBTf4lLOlztkhzAEdQsJ4Lj+i5Wc9k6Nn0K1VyU=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/zap v1.17.0/go.mod h1:MXVU+bhUf/A7Xi2HNOnopQOrmycQ5Ih87HtOu4q5SSo=

vendor/github.com/moby/buildkit/AUTHORS

@@ -1,66 +0,0 @@
-# This file lists all individuals having contributed content to the repository.
-# For how it is generated, see `scripts/generate-authors.sh`.
-
-Aaron L. Xu <likexu@harmonycloud.cn>
-Aaron Lehmann <aaron.lehmann@docker.com>
-Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
-Alexander Morozov <lk4d4@docker.com>
-Alice Frosi <afrosi@de.ibm.com>
-Allen Sun <allen.sun@daocloud.io>
-Anda Xu <anda.xu@docker.com>
-Anthony Sottile <asottile@umich.edu>
-Arnaud Bailly <arnaud.oqube@gmail.com>
-Bin Liu <liubin0329@gmail.com>
-Brian Goff <cpuguy83@gmail.com>
-Daniel Nephin <dnephin@gmail.com>
-Dave Chen <dave.chen@arm.com>
-David Calavera <david.calavera@gmail.com>
-Dennis Chen <dennis.chen@arm.com>
-Derek McGowan <derek@mcgstyle.net>
-Doug Davis <dug@us.ibm.com>
-Edgar Lee <edgarl@netflix.com>
-Eli Uriegas <eli.uriegas@docker.com>
-f0 <f0@users.noreply.github.com>
-Fernando Miguel <github@FernandoMiguel.net>
-Hao Hu <hao.hu.fr@gmail.com>
-Helen Xie <chenjg@harmonycloud.cn>
-Himanshu Pandey <hpandey@pivotal.io>
-Hiromu Nakamura <abctail30@gmail.com>
-Ian Campbell <ijc@docker.com>
-Iskander (Alex) Sharipov <quasilyte@gmail.com>
-Jean-Pierre Huynh <jean-pierre.huynh@ounet.fr>
-Jessica Frazelle <acidburn@microsoft.com>
-John Howard <jhoward@microsoft.com>
-Jonathan Stoppani <jonathan.stoppani@divio.com>
-Justas Brazauskas <brazauskasjustas@gmail.com>
-Justin Cormack <justin.cormack@docker.com>
-Kunal Kushwaha <kushwaha_kunal_v7@lab.ntt.co.jp>
-Lajos Papp <lalyos@yahoo.com>
-Matt Rickard <mrick@google.com>
-Michael Crosby <crosbymichael@gmail.com>
-Miyachi Katsuya <miyachi_katsuya@r.recruit.co.jp>
-Nao YONASHIRO <yonashiro@r.recruit.co.jp>
-Natasha Jarus <linuxmercedes@gmail.com>
-Noel Georgi <18496730+frezbo@users.noreply.github.com>
-Ondrej Fabry <ofabry@cisco.com>
-Patrick Van Stee <patrick@vanstee.me>
-Ri Xu <xuri.me@gmail.com>
-Sebastiaan van Stijn <github@gone.nl>
-Shev Yan <yandong_8212@163.com>
-Simon Ferquel <simon.ferquel@docker.com>
-Stefan Weil <sw@weilnetz.de>
-Thomas Leonard <thomas.leonard@docker.com>
-Thomas Shaw <tomwillfixit@users.noreply.github.com>
-Tibor Vass <tibor@docker.com>
-Tiffany Jernigan <tiffany.f.j@gmail.com>
-Tino Rusch <tino.rusch@gmail.com>
-Tobias Klauser <tklauser@distanz.ch>
-Tomas Tomecek <ttomecek@redhat.com>
-Tomohiro Kusumoto <zabio1192@gmail.com>
-Tõnis Tiigi <tonistiigi@gmail.com>
-Vincent Demeester <vincent.demeester@docker.com>
-Wei Fu <fuweid89@gmail.com>
-Yong Tang <yong.tang.github@outlook.com>
-Yuichiro Kaneko <spiketeika@gmail.com>
-Ziv Tsarfati <digger18@gmail.com>
-郑泽宇 <perhapszzy@sina.com>

vendor/github.com/moby/buildkit/LICENSE

@@ -1,201 +0,0 @@
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vendor/modules.txt

@@ -182,9 +182,6 @@ github.com/miekg/pkcs11
 # github.com/mitchellh/mapstructure v1.3.2
 ## explicit; go 1.14
 github.com/mitchellh/mapstructure
-# github.com/moby/buildkit v0.11.6
-## explicit; go 1.18
-github.com/moby/buildkit/util/appcontext
 # github.com/moby/patternmatcher v0.6.0
 ## explicit; go 1.19
 github.com/moby/patternmatcher