WIP: remove buildkit as dependency

We are only using these:

    tree vendor/github.com/moby/buildkit
    vendor/github.com/moby/buildkit
    ├── AUTHORS
    ├── LICENSE
    ├── frontend
    │   └── dockerfile
    │       └── dockerignore
    │           └── dockerignore.go
    └── util
        ├── appcontext
        │   ├── appcontext.go
        │   ├── appcontext_unix.go
        │   ├── appcontext_windows.go
        │   └── register.go
        └── bklog
            └── log.go

    6 directories, 8 files

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/image/build/dockerignore.go

@@ -4,7 +4,7 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/moby/buildkit/frontend/dockerfile/dockerignore"
+	"github.com/docker/cli/cli/command/image/build/dockerignore"
 	"github.com/moby/patternmatcher"
 )
 

vendor/github.com/moby/buildkit/util/appcontext/appcontext.go → cmd/docker/appcontext/appcontext.go

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

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/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"

vendor.mod

@@ -22,7 +22,6 @@ 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 v0.5.0
 	github.com/moby/swarmkit/v2 v2.0.0-20230707182847-6f78b8199b05
 	github.com/moby/sys/sequential v0.5.0

vendor.sum

@@ -271,8 +271,6 @@ 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 v0.5.0 h1:YCZgJOeULcxLw1Q+sVR636pmS7sPEn1Qo2iAN6M7DBo=
 github.com/moby/patternmatcher v0.5.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
 github.com/moby/swarmkit/v2 v2.0.0-20230707182847-6f78b8199b05 h1:lvMq6zHXnGp6i+6iYDs1Uw9Q5bqiAYd6Sz08hZoxSmY=

vendor/modules.txt

@@ -162,10 +162,6 @@ 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/frontend/dockerfile/dockerignore
-github.com/moby/buildkit/util/appcontext
 # github.com/moby/patternmatcher v0.5.0
 ## explicit; go 1.19
 github.com/moby/patternmatcher