Interactive mode doesn't work with --buildkit-host

[jazzdan]

With an Earthfile like this:

FROM alpine
main:
  RUN false

Without --buildkit-host it works:

$ earthly -i +main
 1. Init 🚀
————————————————————————————————————————————————————————————————————————————————

           buildkitd | Found buildkit daemon as docker container (earthly-buildkitd)


 2. Build 🔧
————————————————————————————————————————————————————————————————————————————————

              alpine | --> Load metadata linux/arm64
               +base | --> FROM alpine
               +base | [██████████] 100% resolve docker.io/library/alpine@sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300
               +main | --> RUN false
               +main | Command /bin/sh -c false failed with exit code 1
               +main | Entering interactive debugger (**Warning: only a single debugger per host is supported**)
               +main |

/ # echo hi
hi

With --buildkit-host:

$ earthly --platform=linux/amd64 --buildkit-host tcp://earthly.dmiller.replay.local:8372 --no-output +main
 1. Init 🚀
————————————————————————————————————————————————————————————————————————————————
 2. Build 🔧
————————————————————————————————————————————————————————————————————————————————
              alpine | --> Load metadata linux/amd64
               +base | platform=linux/amd64
               +base | --> FROM alpine
               +base | [██████████] 100% resolve docker.io/library/alpine@sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300
               +base | [██████████] 100% sha256:59bf1c3509f33515622619af21ed55bbe26d24913cedbca106468a5fb37a50c3
               +base | [██████████] 100% extracting sha256:59bf1c3509f33515622619af21ed55bbe26d24913cedbca106468a5fb37a50c3
               +main | platform=linux/amd64
               +main | --> RUN false
               +main | Command /bin/sh -c false failed with exit code 1
               +main |
               +main | ERROR: Command exited with non-zero code: RUN false
============================ ❌ FAILURE [2. Build 🔧] ============================
Repeating the output of the command that caused the failure
               +main *failed* | platform=linux/amd64
               +main *failed* | --> RUN false
               +main *failed* | Command /bin/sh -c false failed with exit code 1
               +main *failed* |                +main *failed* | ERROR: Command exited with non-zero code: RUN false
Error: build target: build main: bkClient.Build: failed to solve: process "/bin/sh -c PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin /usr/bin/earth_debugger /bin/sh -c 'false'" did not complete successfully: exit code: 1

[vladaionescu]

Oh yeah.. it's a known issue, but not documented. Thanks for raising this. At the very least we should fail more gracefully, saying that this isn't supported yet.

[alexcb]

I added a more clear error under #1496 until we get a proper implementation for this.