From d3b6450854d70b269e29efc1146dd32fac051590 Mon Sep 17 00:00:00 2001
From: Tom Wiesing <tkw01536@gmail.com>
Date: Mon, 18 Jan 2021 10:39:18 +0100
Subject: [PATCH] Add support for an overrides file

---
 .gitignore                                           | 1 +
 distillery/.env.sample                               | 4 ++++
 distillery/lib/10_config.sh                          | 9 +++++++++
 distillery/resources/compose/self/.env.sample        | 3 +++
 distillery/resources/compose/self/docker-compose.yml | 5 +++++
 distillery/resources/templates/docker-env/self       | 1 +
 distillery/system_install.sh                         | 1 +
 7 files changed, 24 insertions(+)

diff --git a/.gitignore b/.gitignore
index 84e40a6..13ac8d0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+/distillery/overrides.json
 authorized_keys
 .vagrant
 .env
diff --git a/distillery/.env.sample b/distillery/.env.sample
index 538d1b1..d1f689b 100644
--- a/distillery/.env.sample
+++ b/distillery/.env.sample
@@ -11,6 +11,10 @@ DEFAULT_DOMAIN=localhost.kwarc.info
 # If you want to change this, set an alternate domain name here. 
 SELF_REDIRECT=
 
+# You can override individual URLS in the homepage. 
+# Do this by adding URLs (without trailing '/'s) into a JSON file
+SELF_OVERRIDES_FILE=/distillery/overrides.json
+
 # The system can support setting up certificate(s) automatically. 
 # It can be enabled by setting an email for certbot certificates. 
 # This email address can be configured here. 
diff --git a/distillery/lib/10_config.sh b/distillery/lib/10_config.sh
index b59c92e..950f52e 100644
--- a/distillery/lib/10_config.sh
+++ b/distillery/lib/10_config.sh
@@ -204,6 +204,15 @@ if [ -z "$GRAPHDB_ADMIN_PASSWORD" ]; then
       exit 1;
 fi;
 
+# The 'SELF_OVERRIDES_FILE' should point to a real json file
+if ! is_valid_file "$SELF_OVERRIDES_FILE"; then
+      log_error "Variable 'SELF_OVERRIDES_FILE' is not a valid file. ";
+      log_info "The variable is currently set to '$SELF_OVERRIDES_FILE'. "
+      log_info "You might want to create this file (with contents '{}') to get rid of the error message. "
+      log_info "Please verify that it is set correctly in '.env'";
+      exit 1;
+fi;
+
 # flags for graphdb authorization
 GRAPHDB_AUTH_FLAGS="--user $(printf "admin:%s" "$GRAPHDB_ADMIN_PASSWORD")"
 
diff --git a/distillery/resources/compose/self/.env.sample b/distillery/resources/compose/self/.env.sample
index d7eba20..e668e99 100644
--- a/distillery/resources/compose/self/.env.sample
+++ b/distillery/resources/compose/self/.env.sample
@@ -4,6 +4,9 @@
 # The target path to redirect to
 TARGET=https://gitlab.cs.fau.de/AGFD/wisski-distillery
 
+# path to .json
+SELF_OVERRIDES_FILE=/overrides.json
+
 #######################
 ### Web Server settings
 #######################
diff --git a/distillery/resources/compose/self/docker-compose.yml b/distillery/resources/compose/self/docker-compose.yml
index 501e02b..6dbff20 100644
--- a/distillery/resources/compose/self/docker-compose.yml
+++ b/distillery/resources/compose/self/docker-compose.yml
@@ -4,6 +4,8 @@ services:
   tr:
     image: tkw01536/tr
     restart: always
+    volumes:
+      - "${OVERRIDES_FILE}:/overrides.json:ro"
     environment:
       # port and hostname for this image to use
       VIRTUAL_HOST: ${VIRTUAL_HOST}
@@ -13,6 +15,9 @@ services:
       LETSENCRYPT_HOST: ${LETSENCRYPT_HOST}
       LETSENCRYPT_EMAIL: ${LETSENCRYPT_EMAIL}
 
+      # the overrides file
+      OVERRIDES: /overrides.json
+
       # where to redirect to
       TARGET: ${TARGET}
 
diff --git a/distillery/resources/templates/docker-env/self b/distillery/resources/templates/docker-env/self
index 69b4449..f93d03e 100644
--- a/distillery/resources/templates/docker-env/self
+++ b/distillery/resources/templates/docker-env/self
@@ -4,3 +4,4 @@ LETSENCRYPT_HOST=${LETSENCRYPT_HOST}
 LETSENCRYPT_EMAIL=${LETSENCRYPT_EMAIL}
 
 TARGET=${TARGET}
+OVERRIDES_FILE=${OVERRIDES_FILE}
diff --git a/distillery/system_install.sh b/distillery/system_install.sh
index bdc8214..42ca611 100755
--- a/distillery/system_install.sh
+++ b/distillery/system_install.sh
@@ -83,6 +83,7 @@ load_template "docker-env/self" \
     "LETSENCRYPT_HOST" "${LETSENCRYPT_HOST}" \
     "LETSENCRYPT_EMAIL" "${LETSENCRYPT_EMAIL}" \
     "TARGET" "${SELF_REDIRECT}" \
+    "OVERRIDES_FILE" "${SELF_OVERRIDES_FILE}" \
     > "$DEPLOY_SELF_DIR/.env"