shell/caucase.sh: Factorise self-test failure codepath.

shell/caucase.sh

@@ -1190,6 +1190,12 @@ EOF
       caucased_dir \
       caucased_type \
       caucased_pid
+    _fail () {
+      # shellcheck disable=SC2059
+      printf "$@"
+      find . -ls
+      exit 1
+    }
     echo 'Automated testing...'
     if command -v caucased > /dev/null; then
       caucased_type="path"
@@ -1288,29 +1294,21 @@ EOF
       | sed 's/\s.*//' \
     )"
     if [ ! -d cas_crt ]; then
-      echo 'cas_crt not created'
-      find . -ls
-      return 1
+      _fail 'cas_crt not created\n'
     fi
     for cas_file in cas_crt/*; do
       if [ -r "$cas_file" ] && [ ! -h "$cas_file" ]; then
         if [ "$cas_found" -eq 1 ]; then
-          echo 'Multiple CAS CA certificates found'
-          find . -ls
-          return 1
+          _fail 'Multiple CAS CA certificates found\n'
         fi
         cas_found=1
       fi
     done
     if [ "$cas_found" -eq 0 ]; then
-      echo 'No CAS CA certificates found, but directory exists'
-      find . -ls
-      return 1
+      _fail 'No CAS CA certificates found, but directory exists\n'
     fi
     if [ ! -f cau.crt.pem ]; then
-      echo 'cau.crt.pem not created'
-      find . -ls
-      return 1
+      _fail 'cau.crt.pem not created\n'
     fi
     echo 'Retrieving auto-issued user certificate...'
     if _main \
@@ -1321,9 +1319,7 @@ EOF
     then
       :
     else
-      echo 'Failed to receive signed user certificate.'
-      find . -ls
-      return 1
+      _fail 'Failed to receive signed user certificate.\n'
     fi
     echo 'Using the user certificate...'
     if _main \
@@ -1334,9 +1330,7 @@ EOF
       > /dev/null; then
       :
     else
-      echo 'Failed to list pending CSR, authentication failed ?'
-      find . -ls
-      return 1
+      _fail 'Failed to list pending CSR, authentication failed ?\n'
     fi
     echo 'Success'
   }