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Change uv caching approach #19

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Merged
coretl merged 1 commit into from
Oct 28, 2025
Merged

Change uv caching approach #19

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17 changes: 10 additions & 7 deletions .devcontainer.json
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Original file line number Diff line number Diff line change
Expand Up @@ -6,10 +6,13 @@
},
"remoteEnv": {
// Allow X11 apps to run inside the container
"DISPLAY": "${localEnv:DISPLAY}"
"DISPLAY": "${localEnv:DISPLAY}",
// Put things that allow it in the persistent cache
"UV_CACHE_DIR": "/cache/uv",
"UV_PYTHON_CACHE_DIR": "/cache/uv-python"
},
// Create the config folder for the user modifiable terminal-config and the uv cache
"initializeCommand": "mkdir -p ${localEnv:HOME}/.config/terminal-config ${localEnv:HOME}/.cache/uv",
// Create the config folder for the user modifiable terminal-config
"initializeCommand": "mkdir -p ${localEnv:HOME}/.config/terminal-config",
"runArgs": [
// Allow the container to access the host X11 display and EPICS CA
"--net=host",
Expand All @@ -23,11 +26,11 @@
"target": "/user-terminal-config",
"type": "bind"
},
// Keep a persistent cross container cache for uv
// Keep a persistent cross container cache
{
"source": "${localEnv:HOME}/.cache/uv",
"target": "/root/.cache/uv",
"type": "bind"
"source": "devcontainer-shared-cache",
"target": "/cache",
"type": "volume"
}
],
// Mount the parent as /workspaces so we can pip install peers as editable
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6 changes: 0 additions & 6 deletions Dockerfile
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Expand Up @@ -46,9 +46,3 @@ RUN /root/terminal-config/ensure-user-terminal-config.sh && \
# Install uv using the official image
# See https://docs.astral.sh/uv/guides/integration/docker/#installing-uv
COPY --from=ghcr.io/astral-sh/uv:0.9 /uv /uvx /bin/

# We recommend mounting in a cache for uv, so silence warnings about it being on a different volume
# and cache python interpreter downloads in the same directory
# https://docs.astral.sh/uv/guides/integration/docker/#caching
ENV UV_LINK_MODE=copy
ENV UV_PYTHON_CACHE_DIR=/root/.cache/uv/python
2 changes: 2 additions & 0 deletions README.md
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Expand Up @@ -46,6 +46,8 @@ History is also stored in this directory, in `.bash_eternal_history` and `.zsh_e

See [this repo's `.devcontainer.json`](./.devcontainer.json) for an example on how to use as a devcontainer. Or clone this repo, open in vscode and click "reopen in container"

If you are considering using this for a pure python project devcontainer, consider using https://github.com/DiamondLightSource/python-copier-template

## How to use in the build stage of a Dockerfile

If you are using this during the build stage of a Dockerfile, then you should select the upstream `ubuntu` container for the runtime.
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