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Cache python installs (#621)

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This pull request introduces support for caching Python installs in the
GitHub Action, allowing users to cache not only dependencies but also
the Python interpreter itself.

This works by setting the `UV_PYTHON_INSTALL_DIR` to a subdirectory of
the dependency cache path so that Python installs are directed there.

Fixes #135

---------

Co-authored-by: Kevin Stillhammer <kevin.stillhammer@gmail.com>
This commit is contained in:
Merlin 2025-10-09 16:47:24 -04:00 • committed by GitHub
parent 3495667518
commit 6d2eb15b49
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8 changed files with 197 additions and 23 deletions
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21
src/utils/inputs.ts
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@ -1,5 +1,6 @@
import path from "node:path";
import * as core from "@actions/core";
import * as exec from "@actions/exec";
import { getConfigValueFromTomlFile } from "./config-file";
export const workingDirectory = core.getInput("working-directory");
@ -15,6 +16,7 @@ export const cacheSuffix = core.getInput("cache-suffix") || "";
export const cacheLocalPath = getCacheLocalPath();
export const cacheDependencyGlob = getCacheDependencyGlob();
export const pruneCache = core.getInput("prune-cache") === "true";
export const cachePython = core.getInput("cache-python") === "true";
export const ignoreNothingToCache =
core.getInput("ignore-nothing-to-cache") === "true";
export const ignoreEmptyWorkdir =
@ -123,6 +125,25 @@ function getCacheDirFromConfig(): string | undefined {
return undefined;
}
export async function getUvPythonDir(): Promise<string> {
if (process.env.UV_PYTHON_INSTALL_DIR !== undefined) {
core.info(
`Using UV_PYTHON_INSTALL_DIR from environment: ${process.env.UV_PYTHON_INSTALL_DIR}`,
);
return process.env.UV_PYTHON_INSTALL_DIR;
}
core.info("Determining uv python dir using `uv python dir`...");
const result = await exec.getExecOutput("uv", ["python", "dir"]);
if (result.exitCode !== 0) {
throw new Error(
`Failed to get uv python dir: ${result.stderr || result.stdout}`,
);
}
const dir = result.stdout.trim();
core.info(`Determined uv python dir: ${dir}`);
return dir;
}
function getCacheDependencyGlob(): string {
const cacheDependencyGlobInput = core.getInput("cache-dependency-glob");
if (cacheDependencyGlobInput !== "") {