feat: support mount-specific Icecast sources

.env.sample

@@ -9,3 +9,18 @@ ICECAST_SOURCE_PASSWORD=changeme
 ICECAST_ADMIN_PASSWORD=changeme
 
 ICECAST_LOCATION=Cyberspace
+
+#####################################################################
+# Icecast mounts                                                    #
+#####################################################################
+
+# One mount per line: mount|username|password|max-listeners
+# Example:
+
+# ICECAST_MOUNTS="
+# /radio1|alias1|changeme|100
+# /radio2|alias2|changeme|150
+# /radio3|alias3|changeme|200
+# "
+
+ICECAST_MOUNTS=""

abra.sh

@@ -0,0 +1 @@
+export ICECAST_ENTRYPOINT_VERSION=v1

compose.yml

@@ -4,6 +4,12 @@ version: "3.8"
 services:
   app:
     image: libretime/icecast:2.5-beta3
+    entrypoint: /coopcloud-entrypoint.sh
+    command: ["icecast", "-c", "/etc/icecast.xml"]
+    configs:
+      - source: icecast_entrypoint
+        target: /coopcloud-entrypoint.sh
+        mode: 0555
     networks:
       - proxy
     environment:
@@ -11,6 +17,7 @@ services:
       - ICECAST_SOURCE_PASSWORD
       - ICECAST_ADMIN_PASSWORD
       - ICECAST_LOCATION
+      - ICECAST_MOUNTS
     deploy:
       restart_policy:
         condition: on-failure
@@ -43,3 +50,8 @@ services:
 networks:
   proxy:
     external: true
+
+configs:
+  icecast_entrypoint:
+    name: ${STACK_NAME}_icecast_entrypoint_${ICECAST_ENTRYPOINT_VERSION}
+    file: entrypoint.sh

entrypoint.sh

@@ -0,0 +1,94 @@
+#!/bin/sh
+
+set -eu
+
+CONFIG=/etc/icecast.xml
+BEGIN_MARKER="<!-- BEGIN COOP-CLOUD MOUNTS -->"
+END_MARKER="<!-- END COOP-CLOUD MOUNTS -->"
+
+xml_escape() {
+    printf '%s' "$1" | sed \
+        -e 's/&/\&amp;/g' \
+        -e 's/</\&lt;/g' \
+        -e 's/>/\&gt;/g' \
+        -e 's/"/\&quot;/g' \
+        -e "s/'/\&apos;/g"
+}
+
+# Remove mounts generated by a previous run.
+awk '
+    /<!-- BEGIN COOP-CLOUD MOUNTS -->/ { skip=1; next }
+    /<!-- END COOP-CLOUD MOUNTS -->/   { skip=0; next }
+    !skip { print }
+' "$CONFIG" > /tmp/icecast.xml
+
+cat /tmp/icecast.xml > "$CONFIG"
+
+if [ -n "${ICECAST_MOUNTS:-}" ]; then
+    MOUNTS=/tmp/icecast-mounts.xml
+
+    printf '%s\n' "$BEGIN_MARKER" > "$MOUNTS"
+
+    printf '%s\n' "$ICECAST_MOUNTS" |
+    while IFS='|' read -r mount username password max_listeners; do
+        [ -z "$mount" ] && continue
+
+        case "$mount" in
+            \#*) continue ;;
+            /*) ;;
+            *)
+                echo "Invalid Icecast mount: $mount must start with /" >&2
+                exit 1
+                ;;
+        esac
+
+        if [ -z "$username" ]; then
+            echo "Invalid Icecast mount $mount: username is required" >&2
+            exit 1
+        fi
+
+        if [ -z "$password" ]; then
+            echo "Invalid Icecast mount $mount: password is required" >&2
+            exit 1
+        fi
+
+        case "$max_listeners" in
+            ''|*[!0-9]*)
+                echo "Invalid max-listeners for $mount: $max_listeners" >&2
+                exit 1
+                ;;
+        esac
+
+        mount=$(xml_escape "$mount")
+        username=$(xml_escape "$username")
+        password=$(xml_escape "$password")
+        max_listeners=$(xml_escape "$max_listeners")
+
+        cat >> "$MOUNTS" <<MOUNT
+    <mount>
+        <mount-name>${mount}</mount-name>
+        <username>${username}</username>
+        <password>${password}</password>
+        <max-listeners>${max_listeners}</max-listeners>
+        <authentication>
+            <role type="anonymous" match-method="source,put" deny-all="*" />
+        </authentication>
+    </mount>
+MOUNT
+    done
+
+    printf '%s\n' "$END_MARKER" >> "$MOUNTS"
+
+    awk '
+        /<\/icecast>/ {
+            while ((getline line < "/tmp/icecast-mounts.xml") > 0)
+                print line
+            close("/tmp/icecast-mounts.xml")
+        }
+        { print }
+    ' "$CONFIG" > /tmp/icecast.xml
+
+    cat /tmp/icecast.xml > "$CONFIG"
+fi
+
+exec /usr/local/bin/docker-entrypoint "$@"