Implement deploy time config

Former-commit-id: 409f61d68d756c605501f76fbfc41730cc239a1e

app/data/container-build/cerc-laconic-console-host/Dockerfile

@@ -36,6 +36,12 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 # ARG EXTRA_NODE_VERSION=10
 # RUN su node -c "source /usr/local/share/nvm/nvm.sh && nvm install ${EXTRA_NODE_VERSION}"
 
+# We do this to get a yq binary from the published container, for the correct architecture we're building here
+COPY --from=docker.io/mikefarah/yq:latest /usr/bin/yq /usr/local/bin/yq
+
+RUN mkdir -p /scripts
+COPY ./apply-webapp-config.sh /scripts
+
 # [Optional] Uncomment if you want to install more global node modules
 # RUN su node -c "npm install -g <your-package-list-here>"
 
@@ -44,15 +50,17 @@ RUN npm config set @cerc-io:registry ${CERC_NPM_URL} \
     && npm config set @lirewine:registry ${CERC_NPM_URL} \
     && npm config set -- ${CERC_NPM_URL}:_authToken ${CERC_NPM_AUTH_TOKEN}
 
+RUN mkdir -p /config
+COPY ./config.yml /config
+
 # Install simple web server for now (use nginx perhaps later)
 RUN yarn global add http-server
 
 # Globally install the payload web app package
 RUN yarn global add @cerc-io/console-app
 
-# Temp hack to fix up config
-RUN cd /usr/local/share/.config/yarn/global/node_modules/@cerc-io/console-app/dist/production && \
-    find . -type f -exec sed -i 's#LACONIC_HOSTED_CONFIG_SERVICES_WNS_SERVER#http://laconicd:9473/api#g' {} +
+# Run this script to substitute the config values into the unpackaged webapp files:
+# ./scripts/apply-webapp-config.sh ./config/config.yml /usr/local/share/.config/yarn/global/node_modules/@cerc-io/console-app/dist/production
 
 # Expose port for http
 EXPOSE 80

app/data/container-build/cerc-laconic-console-host/apply-webapp-config.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+if [ -n "$CERC_SCRIPT_DEBUG" ]; then
+    set -x
+fi
+if [[ $# -ne 2 ]]; then
+    echo "Illegal number of parameters" >&2
+    exit 1
+fi
+config_file_name=$1
+webapp_files_dir=$2
+if ![[ -f ${config_file_name} ]]; then
+    echo "Config file ${config_file_name} does not exist" >&2
+    exit 1
+fi
+if ![[ -d ${webapp_files_dir} ]]; then
+    echo "Webapp directory ${webapp_files_dir} does not exist" >&2
+    exit 1
+fi
+# First some magic using yq to translate our yaml config file into an array of key value pairs like:
+# LACONIC_HOSTED_CONFIG_<path-through-objects>=<value>
+readarray -t config_kv_pair_array < <( yq '.. | select(length > 2) | ([path | join("_"), .] | join("=") )' ${config_file_name} | sed 's/^/LACONIC_HOSTED_CONFIG_/' )
+declare -p config_kv_pair_array
+# Then iterate over that kv array making the template substitution in our web app files
+for kv_pair_string in "${config_kv_pair_array[@]}"
+do
+    kv_pair=(${kv_pair_string//=/ })
+    template_string_to_replace=${kv_pair[0]}
+    template_value_to_substitute=${kv_pair[1]}
+    # Run find and sed to do the substitution of one variable over all files
+    # See: https://stackoverflow.com/a/21479607/1701505
+    echo "Substituting: ${template_string_to_replace} = ${template_value_to_substitute}"
+    # Note: we do not escape our strings, on the expectation they do not container the '#' char.
+    find ${webapp_files_dir} -type f -exec sed -i 's#'${template_string_to_replace}'#'${template_value_to_substitute}'#g' {} +
+done

app/data/container-build/cerc-laconic-console-host/config.yml

@@ -0,0 +1,6 @@
+# Config for laconic-console running in a fixturenet with laconicd
+
+services:
+  wns:
+    server: 'http:/laconicd:9473/api'
+    webui: 'http://laconicd:9473/console'

app/data/container-build/cerc-laconic-console-host/start-serving-app.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+if [ -n "$CERC_SCRIPT_DEBUG" ]; then
+    set -x
+fi