build(Makefile): fix shell; introduce enter for launching shells in running containers

Makefile

@@ -23,6 +23,8 @@ export SERVICE_PARALLEL ?= false
 export JOB
 export JOB_ID
 export CONTAINER_CMD
+export ENTRYPOINT
+export EXEC_OPTS
 
 export BASE_PORTS
 export UNIWORXDB_OPTS ?= -cf
@@ -257,17 +259,26 @@ status:
 log-%:
 	$(CONTAINER_COMMAND) logs --follow `cat $(DEVELOP)/$* | grep CONTAINER_ID= | sed 's/^CONTAINER_ID=//'`
 
-# TODO: rework shells
-.PHONY: %-shell
-# HELP: launch shell (bash) inside a currently running container
-%-shell: --%_shell;
---shell:
-	$(CONTAINER_COMMAND) exec -it $(EXEC_OPTS) fradrive.$(CURR_DEV).$* $(if $(ENTRYPOINT),$(ENTRYPOINT),/bin/bash)
+.PHONY: enter
+# HELP: launch (bash) shell inside a currently running container. Use ./enter shell wrapper for more convenient usage, possibly with tab-completion in the future
+enter: --ensure-develop
+	$(MAKE) -- --shell
+
 .PHONY: psql
 # HELP: enter psql (postgresql) cli inside a currently running database container
 psql: ENTRYPOINT=/usr/bin/psql -d uniworx
 psql: EXEC_OPTS=--user postgres
-psql: --database-shell;
+psql: --ensure-develop
+	$(MAKE) -- --shell CONTAINER_FILE=develop/`cat develop/.current`/start-postgres
+
+.PHONY: ghci
+# HELP: launch new backend instance and enter interactive ghci shell (WIP)
+ghci: ENTRYPOINT=stack ghci
+ghci: --shell;
+
+--shell:
+	CONTAINER_ID=`cat $(CONTAINER_FILE) | grep 'CONTAINER_ID=' | sed 's/CONTAINER_ID=//'` ; \
+	$(CONTAINER_COMMAND) exec -it $(EXEC_OPTS) $${CONTAINER_ID} $(if $(ENTRYPOINT),$(ENTRYPOINT),/bin/bash)
 
 # TODO: rework stops
 .PHONY: stop

enter

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+make enter CONTAINER_FILE=develop/`cat develop/.current`/"$1"