chore: manually install fossa (#579)

Author: ascorbic

.github/workflows/fossa.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - chore/fossa-workflow # convenience branch for future fossa tweaks
 
 defaults:
   run:
@@ -15,10 +16,15 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-      - name: Fossa init
+      - name: Download fossa cli
         run: |-
-          curl -H 'Cache-Control: no-cache' https://raw.githubusercontent.com/fossas/fossa-cli/master/install.sh | bash
-          fossa init
+          curl -L https://github.com/fossas/fossa-cli/releases/download/v1.1.2/fossa-cli_1.1.2_linux_amd64.tar.gz > fossa-cli.tar.gz
+              tar -xvzf fossa-cli.tar.gz
+              mkdir -p $HOME/.local/bin
+              echo "$HOME/.local/bin" >> $GITHUB_PATH
+              mv fossa $HOME/.local/bin/fossa
+      - name: Fossa init
+        run: fossa init
       - name: Set env
         run: echo "line_number=$(grep -n "project" .fossa.yml | cut -f1 -d:)" >> $GITHUB_ENV
       - name: Configuration