Let users keep the system packages cache

README.md

@@ -273,12 +273,13 @@ zlib
 
 ## Configuration
 
-The compilation of some extensions may be fine-tuned to better fit your needs by using environment variables:
+You can configure the behavior of the script, as well as fine-tune some extensions in order fit your needs, by using environment variables:
 
 | Extension | Environment variable | Description |
 |---|---|---|
-| lzf | IPE_LZF_BETTERCOMPRESSION=1 | By default `install-php-extensions` compiles the `lzf` extension to prefer speed over size; you can use this environment variable to compile it preferring size over speed  |
+| | `IPE_KEEP_SYSPKG_CACHE=1` | By default the script will clear the apt/apk/pear cache in order to save disk space. You can disable it by setting this environment variable |
-| event | IPE_EVENT_NAMESPACE=... | By default the `event` classes are defined in the root namespace. You can use this environment variable to specify a custom namespace |
+| lzf | `IPE_LZF_BETTERCOMPRESSION=1` | By default `install-php-extensions` compiles the `lzf` extension to prefer speed over size; you can use this environment variable to compile it preferring size over speed  |
+| event | `IPE_EVENT_NAMESPACE=`... | By default the `event` classes are defined in the root namespace. You can use this environment variable to specify a custom namespace |
 
 ## Special requirements
 

install-php-extensions

@@ -2725,6 +2725,14 @@ cleanup() {
 				;;
 		esac
 	fi
+	docker-php-source delete
+	rm -rf /tmp/src
+	rm -rf /tmp/pickle
+	rm -rf /tmp/pickle.tmp
+	rm -rf "$CONFIGURE_FILE"
+	case "${IPE_KEEP_SYSPKG_CACHE:-}" in
+		1 | y* | Y*) ;;
+		*)
 			case "$DISTRO" in
 				alpine)
 					rm -rf /var/cache/apk/*
@@ -2733,12 +2741,9 @@ cleanup() {
 					rm -rf /var/lib/apt/lists/*
 					;;
 			esac
-	docker-php-source delete
 			rm -rf /tmp/pear
-	rm -rf /tmp/src
+			;;
-	rm -rf /tmp/pickle
+	esac
-	rm -rf /tmp/pickle.tmp
-	rm -rf "$CONFIGURE_FILE"
 }
 
 resetIFS