chore(controller): update SSH config to support any Git server (#32)

Dynamically extract and configure any Git server from SEMAPHORE_GIT_URL

Author: radwo

charts/controller/Chart.yaml

@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.2.3
+version: 0.2.4
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/controller/pre-job-hook.sh

@@ -31,9 +31,23 @@ fi
 echo "Semaphore toolbox successfully installed."
 
 # Create SSH configuration.
-# This is required in order to avoid having to manually accept the GitHub SSH keys fingerprints on checkout.
-# Ideally, we should populate ~/.ssh/known_hosts with the GitHub keys from api.github.com/meta.
+# This is required to avoid manually accepting the Server SSH key fingerprints on checkout.
 mkdir -p ~/.ssh
+
+#
+# Do it for GitHub for backwards compatibility
+#
 echo 'Host github.com' | tee -a ~/.ssh/config
 echo '  StrictHostKeyChecking no' | tee -a ~/.ssh/config
 echo '  UserKnownHostsFile=/dev/null' | tee -a ~/.ssh/config
+
+#
+# Do it for currently used one
+#
+url="${SEMAPHORE_GIT_URL#ssh://}"  # Remove the "ssh://" scheme if present
+url="${url#*@}"                    # Remove everything up to (and including) the '@' if present
+host="${url%%[:/]*}"               # Now extract the host: it's the substring until the first occurrence of either ':' (port separator) or '/' (path separator)
+
+echo "Host ${host}" | tee -a ~/.ssh/config
+echo '  StrictHostKeyChecking no' | tee -a ~/.ssh/config
+echo '  UserKnownHostsFile=/dev/null' | tee -a ~/.ssh/config