README: Fix another typo in the docs for min-minor

The major/minor will be the minimum, but the patch will be the latest. E.g. `julia = "1.10"` would lead to e.g. 1.10.10 (not 1.10.0).

README.md

@@ -139,7 +139,9 @@ You can either specify specific Julia versions or version ranges. If you specify
 - `'pre'` will install the latest prerelease build (RCs, betas, and alphas).
 - `'nightly'` will install the latest nightly build.
 - `'1.7-nightly'` will install the latest nightly build for the upcoming 1.7 release. This version will only be available during certain phases of the Julia release cycle.
-- `'min'` will install the earliest supported version of Julia compatible with the project. Especially useful in monorepos.
+- `'min'` is equivalent to `min-minor`.
+- `'min-minor'` will install the earliest supported major/minor version of Julia compatible with the project. Especially useful in monorepos. Note: `min-minor` chooses the lowest major/minor, but gives the latest patch. For example, for a Julia `[compat]` entry of `julia = "1.10"`, `min-minor` would resolve to e.g. `1.10.11` (NOT `1.10.0`).
+- `'min-patch'` will install the earliest supported major/minor/patch version of Julia compatible with the project. For example, for a Julia `[compat]` entry of `julia = "1.10"`, `min-patch` would resolve to e.g. `1.10.0`.
 
 Internally the action uses node's semver package to resolve version ranges. Its [documentation](https://github.com/npm/node-semver#advanced-range-syntax) contains more details on the version range syntax. You can test what version will be selected for a given input in this JavaScript [REPL](https://repl.it/@SaschaMann/setup-julia-version-logic).
 

src/installer.ts

@@ -174,12 +174,26 @@ export function getJuliaVersion(availableReleases: string[], versionInput: strin
     if (semver.valid(versionInput) == versionInput || versionInput.endsWith('nightly')) {
         // versionInput is a valid version or a nightly version, use it directly
         version = versionInput
-    } else if (versionInput == "min") {
+    } else if (versionInput == "min" || versionInput == "min-minor" || versionInput == "min-patch") {
         // Resolve "min" to the minimum supported Julia version compatible with the project file
         if (!juliaCompatRange) {
-            throw new Error('Unable to use version "min" when the Julia project file does not specify a compat for Julia')
+            throw new Error('Unable to use version "min" (or "min-minor" or "min-patch") when the Julia project file does not specify a compat for Julia')
+        }
+        // true_min_version is the actual minimum
+        // E.g. if the Julia [compat] entry is "1.10", then true_min_version is v"1.10.0"
+        let true_min_version = semver.minSatisfying(availableReleases, juliaCompatRange, {includePrerelease})
+        let my_tilde_range = `~${true_min_version}`
+        // min_with_latest_patch is the minimum major/minor, but latest patch
+        // E.g. if the Julia [compat] entry is "1.10", then true__version is v"1.10.11" (or whatever the latest 1.10.x patch is)
+        // https://github.com/julia-actions/setup-julia/issues/372
+        let min_with_latest_patch = semver.maxSatisfying(availableReleases, my_tilde_range, {includePrerelease})
+        if (versionInput == "min" || versionInput == "min-minor") {
+            version = min_with_latest_patch
+        } else if (versionInput == "min-patch") {
+            version = true_min_version
+        } else {
+            throw new Error(`Unexpected error. Invalid value for versionInput: ${versionInput}`)
         }
-        version = semver.minSatisfying(availableReleases, juliaCompatRange, {includePrerelease})
     } else if (versionInput == "lts") {
         version = semver.maxSatisfying(availableReleases, LTS_VERSION, { includePrerelease: false });
     } else if (versionInput == "pre") {