Remote Bake file definition

You can also build Bake files directly from a remote Git repository or HTTPS URL:

$ docker buildx bake "https://github.com/docker/cli.git#v20.10.11" --print
#1 [internal] load git source https://github.com/docker/cli.git#v20.10.11
#1 0.745 e8f1871b077b64bcb4a13334b7146492773769f7       refs/tags/v20.10.11
#1 2.022 From https://github.com/docker/cli
#1 2.022  * [new tag]         v20.10.11  -> v20.10.11
#1 DONE 2.9s

{
  "group": {
    "default": {
      "targets": ["binary"]
    }
  },
  "target": {
    "binary": {
      "context": "https://github.com/docker/cli.git#v20.10.11",
      "dockerfile": "Dockerfile",
      "args": {
        "BASE_VARIANT": "alpine",
        "GO_STRIP": "",
        "VERSION": ""
      },
      "target": "binary",
      "platforms": ["local"],
      "output": ["build"]
    }
  }
}

As you can see the context is fixed to https://github.com/docker/cli.git even if no context is actually definedopen_in_new in the definition.

If you want to access the main context for bake command from a bake file that has been imported remotely, you can use the BAKE_CMD_CONTEXT built-in var.

$ curl -s https://raw.githubusercontent.com/tonistiigi/buildx/remote-test/docker-bake.hcl

target "default" {
  context = BAKE_CMD_CONTEXT
  dockerfile-inline = <<EOT
FROM alpine
WORKDIR /src
COPY . .
RUN ls -l && stop
EOT
}

$ docker buildx bake "https://github.com/tonistiigi/buildx.git#remote-test" --print

{
  "target": {
    "default": {
      "context": ".",
      "dockerfile": "Dockerfile",
      "dockerfile-inline": "FROM alpine\nWORKDIR /src\nCOPY . .\nRUN ls -l \u0026\u0026 stop\n"
    }
  }
}

$ touch foo bar
$ docker buildx bake "https://github.com/tonistiigi/buildx.git#remote-test"

...
 > [4/4] RUN ls -l && stop:
#8 0.101 total 0
#8 0.102 -rw-r--r--    1 root     root             0 Jul 27 18:47 bar
#8 0.102 -rw-r--r--    1 root     root             0 Jul 27 18:47 foo
#8 0.102 /bin/sh: stop: not found

$ docker buildx bake "https://github.com/tonistiigi/buildx.git#remote-test" "https://github.com/docker/cli.git#v20.10.11" --print
#1 [internal] load git source https://github.com/tonistiigi/buildx.git#remote-test
#1 0.429 577303add004dd7efeb13434d69ea030d35f7888       refs/heads/remote-test
#1 CACHED

{
  "target": {
    "default": {
      "context": "https://github.com/docker/cli.git#v20.10.11",
      "dockerfile": "Dockerfile",
      "dockerfile-inline": "FROM alpine\nWORKDIR /src\nCOPY . .\nRUN ls -l \u0026\u0026 stop\n"
    }
  }
}

$ docker buildx bake "https://github.com/tonistiigi/buildx.git#remote-test" "https://github.com/docker/cli.git#v20.10.11"

...
 > [4/4] RUN ls -l && stop:
#8 0.136 drwxrwxrwx    5 root     root          4096 Jul 27 18:31 kubernetes
#8 0.136 drwxrwxrwx    3 root     root          4096 Jul 27 18:31 man
#8 0.136 drwxrwxrwx    2 root     root          4096 Jul 27 18:31 opts
#8 0.136 -rw-rw-rw-    1 root     root          1893 Jul 27 18:31 poule.yml
#8 0.136 drwxrwxrwx    7 root     root          4096 Jul 27 18:31 scripts
#8 0.136 drwxrwxrwx    3 root     root          4096 Jul 27 18:31 service
#8 0.136 drwxrwxrwx    2 root     root          4096 Jul 27 18:31 templates
#8 0.136 drwxrwxrwx   10 root     root          4096 Jul 27 18:31 vendor
#8 0.136 -rwxrwxrwx    1 root     root          9620 Jul 27 18:31 vendor.conf
#8 0.136 /bin/sh: stop: not found