Make incorrect condarc only a warning

.github/workflows/test.yml

@@ -323,6 +323,30 @@ jobs:
           which micromamba | grep not-on-path/bin
         shell: bash -elo pipefail {0}
 
+  incorrect-condarc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      # this should produce a warning
+      - uses: ./
+        with:
+          condarc-file: test/.condarc.2
+      - run: |
+          ! micromamba info | grep .condarc.2
+        shell: bash -elo pipefail {0}
+
+  correct-condarc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      # this should produce a warning
+      - uses: ./
+        with:
+          condarc-file: test/.condarc.yml
+      - run: |
+          micromamba info | grep .condarc.yml
+        shell: bash -elo pipefail {0}
+
   # not properly testable
   # https://github.com/actions/runner/issues/2347
   # https://github.com/orgs/community/discussions/15452

package.json

@@ -1,6 +1,6 @@
 {
   "name": "setup-micromamba",
-  "version": "1.7.1",
+  "version": "1.7.3",
   "private": true,
   "description": "Action to setup micromamba",
   "scripts": {

src/options.ts

@@ -224,8 +224,17 @@ const checkForKnownIssues = (options: Options) => {
       'You are using a micromamba version < 1.4.5-0 and initialize the shell. This is behavior is deprecated. Please update the micromamba version. For further informations, see https://github.com/mamba-org/setup-micromamba/pull/107'
     )
   }
-  if (options.condarcFile && path.basename(options.condarcFile) !== '.condarc') {
-    throw new Error(
+  const condarcBasename = path.basename(options.condarcFile)
+  // https://github.com/mamba-org/mamba/blob/c54c4b530e6638c8712f6246200d0f5a32410b46/libmamba/src/api/configuration.cpp#L955
+  const hasValidCondarcName =
+    condarcBasename === '.condarc' ||
+    condarcBasename === 'condarc' ||
+    condarcBasename === '.mambarc' ||
+    condarcBasename === 'mambarc' ||
+    condarcBasename.endsWith('.yml') ||
+    condarcBasename.endsWith('.yaml')
+  if (!hasValidCondarcName) {
+    core.warning(
       `You are using a condarc file that is not named '.condarc'. This is currently not supported by micromamba, see https://github.com/mamba-org/mamba/issues/1394`
     )
   }

test/.condarc.yml

@@ -0,0 +1,2 @@
+channels:
+  - pytorch

test/condarc.yml

@@ -0,0 +1,2 @@
+channels:
+  - pytorch