Compose: Docker compose: TypeError: You must specify a directory to build in path

[rubenvdham]

I'm almost 100% confident it is my own stupidity causing this error. However, I would really like to fix this:)

I'm currently using the docker-compose.yml in this attachment:
docker-compose.txt
(File extension on my server is still .yml, github doesn't support this fileformat)

This is the DockerFilePython's contents:
FROM python:3
RUN mkdir /API
WORKDIR /API

COPY ./storage/API /API

RUN pip install -r ./Requirements/requirements.txt
EXPOSE 8080

The error message:

Creating network "nginx_default" with the default driver
Pulling letsencrypt (certbot/certbot:latest)...
latest: Pulling from certbot/certbot
ab7e51e37a18: Pull complete
4a57a4e05b89: Pull complete
de1aaf39fd2e: Pull complete
275f7596216d: Pull complete
26ff0951ada2: Pull complete
720c12286e45: Pull complete
75ea27beb351: Pull complete
ba1ec6a72841: Pull complete
ee94d63fa6ec: Pull complete
f2b03ee42053: Pull complete
Digest: sha256:f04d0f48088e9acd0231b06f9d551d4e86dc9932f74981860ad4ff23d049bb3a
Status: Downloaded newer image for certbot/certbot:latest
Pulling mysql (mysql/mysql-server:latest)...
latest: Pulling from mysql/mysql-server
2bf8c3d0d93d: Pull complete
7f2eb0e72ab8: Pull complete
3836cccaebc4: Pull complete
dce39216b323: Pull complete
Digest: sha256:6305a35c134c9ad0724f77883dfd30fc9e4a640ba0d62a1b92b348944369aa9d
Status: Downloaded newer image for mysql/mysql-server:latest
Building reinstrijder-api
Traceback (most recent call last):
File "bin/docker-compose", line 6, in
File "compose/cli/main.py", line 71, in main
File "compose/cli/main.py", line 124, in perform_command
File "compose/cli/main.py", line 959, in up
File "compose/project.py", line 452, in up
File "compose/service.py", line 324, in ensure_image_exists
File "compose/service.py", line 967, in build
File "site-packages/docker/api/build.py", line 142, in build
TypeError: You must specify a directory to build in path
Failed to execute script docker-compose

What am I doing wrong? Thanks in advance!

[shin-]

Do this instead:

build:
  context: .
  dockerfile: DockerFilePython

[rubenvdham]

It worked great^^
Thanks a lot!

[DaveSlinn]

I'm not sure if commenting on a closed issue is proper github etiquette, but I'm trying to diagnose an issue on a Confluent Kafka repo. See https://github.com/confluentinc/cp-docker-images/issues/636. Running a docker-compose up --build on one of their examples generates this same TypeError: You must specify a directory to build in path error, but it seems like it's only on Docker for Windows. I tried it on Ubuntu and there was no issue. Specifically, the error is their build section specifies a dockerfile pulled from a different github repo:

connect:
    image: confluentinc/kafka-connect-datagen:0.1.0
    build:
      context: https://github.com/confluentinc/kafka-connect-datagen/raw/master/Dockerfile-confluenthub
      dockerfile: Dockerfile-confluenthub
    hostname: connect

We can work around the issue by saving that dockerfile locally and changing the docker-compose.yml to

connect:
    image: confluentinc/kafka-connect-datagen:0.1.0
    build:
      context: .
      dockerfile: Dockerfile-confluenthub
    hostname: connect

Is this a bug in Docker for Windows for docker compose build URL references and if not, what is the recommended way to do this without error?

[DaveSlinn]

Docker for Windows updated to version 2.0 earlier this week and I retested this and it is working now.

[tomkuba]

Same error here. Hope this helps someone. The problem is that docker-compose.yml is on linux filesystem (WSL), but I use /mnt/c/Program Files/Docker/Docker/Resources/bin/docker-compose.exe.
Once I moved ~/docker-compose.yml from linux system to Windows file system (/mnt/c/) the error was gone.

[SteveScott]

I got this error because I was on a network drive. Moving the folder to the local drive got it working for me on Windows 10.

[darrinsimmons]

Thanks @SteveScott. When I moved from network drive to local drive, it also worked for me on Windows 10.