Merge pull request #197 from desci-labs/m0ar/ceramic-config-interpola…

…tion

Ceramic Dockerfile with config interpolation

.ceramicTemplate.config.json

@@ -0,0 +1,35 @@
+{
+  "anchor": { },
+  "http-api": {
+    "cors-allowed-origins": [
+      ".*"
+    ],
+    "admin-dids": [
+      "did:key:z6MktbKJrMnhVJ37QFTo12911ycm2juKDUzWHDVETu9s5a9T"
+    ]
+  },
+  "ipfs": {
+    "mode": "remote",
+    "host": "@DOCKER_HOST@"
+  },
+  "logger": {
+    "log-level": 2
+  },
+  "metrics": {
+    "metrics-exporter-enabled": false,
+    "metrics-port": 9090
+  },
+  "network": {
+    "name": "inmemory"
+  },
+  "node": {},
+  "state-store": {
+    "mode": "fs",
+    "local-directory": "/root/.ceramic/statestore"
+  },
+  "indexing": {
+    "db": "@POSTGRES_URI@",
+    "allow-queries-before-historical-sync": true,
+    "models": []
+  }
+}

ceramic.Dockerfile

@@ -0,0 +1,9 @@
+FROM ceramicnetwork/js-ceramic:3.2.0
+
+COPY interpolateConfigVars.sh .
+COPY .ceramicTemplate.config.json .
+
+ENTRYPOINT [ \
+  "bash", "-c", \
+  "./interpolateConfigVars.sh .ceramicTemplate.config.json | jq > daemon.config.json && ./packages/cli/bin/ceramic.js daemon --config daemon.config.json" \
+]

interpolateConfigVars.sh

@@ -0,0 +1,38 @@
+#! /usr/bin/env bash
+
+set -euo pipefail
+
+# Send output to stderr
+echoerr() {
+  echo "$@" 1>&2;
+}
+
+TEMPLATE_FILE=$1
+if [[ -z "$TEMPLATE_FILE" ]]; then
+  echoerr "Template file not passed as first argument, exiting."
+  exit 1
+fi
+
+# Get all variables needing substitution
+TEMPLATE_VARS=$(grep --only-matching "@.*@" "$TEMPLATE_FILE" | tr --delete "@")
+
+# Check that each template var exists in env
+while read -r templateVar; do
+  if ! printenv "$templateVar" &>/dev/null; then
+    echoerr "$templateVar is not set in environment, exiting."
+    exit 1
+  fi
+done <<<"$TEMPLATE_VARS"
+
+
+# For each line in the template file
+while read -r line; do
+  # If we got a variable in the line...
+  if var=$(grep --only-matching "@.*@" <<<"$line" | tr --delete "@"); then
+    # ...replace it with the env variable
+    sed "s/@$var@/$(printenv "$var")/" <<<"$line"
+  else
+    # ...else just re-print the line
+    echo "$line"
+  fi
+done < "$TEMPLATE_FILE"