# assemble.py

from pathlib import Path

from latch import small_task
from latch.types import LatchFile

# Path relative to the task directory

@small_task(dockerfile=Path(__file__).parent / "Dockerfile")
def assembly_task(read1: LatchFile, read2: LatchFile) -> LatchFile:
    ...
    return LatchFile(str(sam_file), "latch:///covid_assembly.sam")

# sam_blaster.py

from pathlib import Path

from latch import small_task
from latch.types import LatchFile

@small_task(dockerfile=Path(__file__).parent / "Dockerfile")
def sam_blaster(sam: LatchFile) -> LatchFile:
    ...
    return LatchFile(blasted_sam, f"latch:///{blasted_sam.name}")

Dockerfiles can be organized as follows:

wf
├── Dockerfile
├── __init__.py
├── assemble
│   ├── Dockerfile
│   └── __init__.py
└── sam_blaster
    ├── Dockerfile
    └── __init__.py

The root directory used when building the images is always the workflow directory.

​
Limitations

latch develop uses the Dockerfile in the workflow directory and not any of the individual Dockerfiles

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OverviewCommon Dockerfile patterns