Fix logic on venv (#5038)

CHANGELOG.md

@@ -5,9 +5,10 @@ CHANGELOG
 
 - Add pluginDownloadURL field to package definition
   [#4947](https://github.com/pulumi/pulumi/pull/4947)
+
 - Add support for streamInvoke during update
   [#4990](https://github.com/pulumi/pulumi/pull/4990)
-  
+
 - Add ability to copy configuration values between stacks
   [#4971](https://github.com/pulumi/pulumi/pull/4971)
 
@@ -20,6 +21,9 @@ CHANGELOG
 - Output PDB files and enable SourceLink integration for .NET assemblies
   [#4967](https://github.com/pulumi/pulumi/pull/4967)
 
+- Fix logic to parse pulumi venv on github action
+  [5038](https://github.com/pulumi/pulumi/pull/5038)
+
 ## 2.6.1 (2020-07-09)
 
 - Fix a panic in the display during CLI operations

dist/actions/entrypoint.sh

@@ -121,12 +121,12 @@ if [ -e requirements.txt ]; then
     # Check if should use venv
     PULUMI_VENV=$(cat Pulumi.yaml | grep "virtualenv:" | cut -d':' -f2)
     if [ -z $PULUMI_VENV ]; then
+        pip3 install -r requirements.txt
+    else
         python3 -m venv $PULUMI_VENV
         source $PULUMI_VENV/bin/activate
         pip3 install -r requirements.txt
         deactivate
-    else
-        pip3 install -r requirements.txt
     fi
 fi