[tarantool-patches] [PATCH v3 1/1] sql: tarantoolctl "enter" with set language

[imeevma@tarantool.org]

This patch allow to use option "--language" with
"tarantoolctl enter" command. Also default value
for language were added in default configuration
file. Language is either SQL or Lua.

Closes #2385.

@TarantoolBot document
Title: Language selection for tarantoolctl
"enter".
User can select either Lua or SQL when he uses tarantoolctl
 "enter" command. It can be done using "--language=<language>"
syntax. Default language is set in tarantoolctl config file.
Usage:
tarantoolctl enter <app_name> --language=SQL
tarantoolctl enter <app_name> --language=Lua
---
Branch: https://github.com/tarantool/tarantool/tree/imeevma/gh-2385-select-input-language-tarantoolctl
Issue: https://github.com/tarantool/tarantool/issues/2385

 extra/dist/CMakeLists.txt       |  1 +
 extra/dist/default/tarantool.in |  1 +
 extra/dist/tarantoolctl.in      | 31 +++++++++++++++++++++++++++----
 3 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/extra/dist/CMakeLists.txt b/extra/dist/CMakeLists.txt
index 862689e..3045b5a 100644
--- a/extra/dist/CMakeLists.txt
+++ b/extra/dist/CMakeLists.txt
@@ -34,6 +34,7 @@ message (STATUS "tarantoolctl logdir: ${TARANTOOL_LOGDIR}")
 set(TARANTOOL_RUNDIR "${CMAKE_INSTALL_FULL_LOCALSTATEDIR}/run/tarantool")
 message (STATUS "tarantoolctl rundir: ${TARANTOOL_RUNDIR}")
 set(TARANTOOL_USER "tarantool")
+set(TARANTOOL_LANGUAGE "lua")
 set(SYSCONFIG_AVAILABLEDIR "tarantool/instances.available")
 set(SYSCONFIG_ENABLEDDIR "tarantool/instances.enabled")
 set(TARANTOOL_AVAILABLEDIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}/${SYSCONFIG_AVAILABLEDIR}")
diff --git a/extra/dist/default/tarantool.in b/extra/dist/default/tarantool.in
index 9a8dad3..01e7144 100644
--- a/extra/dist/default/tarantool.in
+++ b/extra/dist/default/tarantool.in
@@ -20,6 +20,7 @@ default_cfg = {
     vinyl_dir  = "@TARANTOOL_DATADIR@", -- @TARANTOOL_DATADIR@/${INSTANCE}
     log        = "@TARANTOOL_LOGDIR@", -- @TARANTOOL_LOGDIR@/${INSTANCE}.log
     username   = "@TARANTOOL_USER@",
+    language   = "@TARANTOOL_LANGUAGE@",
 }
 
 -- instances.available - all available instances
diff --git a/extra/dist/tarantoolctl.in b/extra/dist/tarantoolctl.in
index 2dd5d74..edda76d 100755
--- a/extra/dist/tarantoolctl.in
+++ b/extra/dist/tarantoolctl.in
@@ -47,6 +47,7 @@ local default_cfg
 local positional_arguments
 local keyword_arguments
 local lua_arguments = arg
+local language
 
 -- function for printing usage reference
 local usage
@@ -155,6 +156,14 @@ local function load_default_file(default_file)
     d.vinyl_dir = fio.pathjoin(d.vinyl_dir, instance_name)
     d.log       = fio.pathjoin(d.log,       instance_name .. '.log')
 
+    language = (d.language or "lua"):lower()
+    d.language  = nil
+
+    if language ~= "lua" and language ~= "sql" then
+        log.error('Unknown language: %s', language)
+        os.exit(1)
+    end
+
     default_cfg = d
 
     if not usermode then
@@ -629,6 +638,12 @@ local function logrotate()
 end
 
 local function enter()
+    local options = keyword_arguments
+    language = (options.language or language):lower()
+    if language ~= "lua" and language ~= "sql" then
+        log.error('Unknown language: %s', options.language)
+        return 1
+    end
     local console_sock_path = uri.parse(console_sock).service
     if fio.stat(console_sock_path) == nil then
         log.error("Can't connect to %s (%s)", console_sock_path, errno.strerror())
@@ -639,12 +654,15 @@ local function enter()
         return 1
     end
 
-    local cmd = string.format(
+    local cmd_connect = string.format(
         "require('console').connect('%s', { connect_timeout = %s })",
         console_sock, TIMEOUT_INFINITY
     )
 
-    console.on_start(function(self) self:eval(cmd) end)
+    local cmd_language = string.format("\\set language %s", language)
+
+    console.on_start(function(self) self:eval(cmd_connect)
+                     self:eval(cmd_language) end)
     console.on_client_disconnect(function(self) self.running = false end)
     console.start()
     return 0
@@ -1008,11 +1026,15 @@ local commands = setmetatable({
         }
     }, enter = {
         func = exit_wrapper(enter), process = process_local, help = {
-            header = "%s enter INSTANCE",
+            header = "%s enter INSTANCE [--language=language]",
             linkmode = "%s enter",
             description =
 [=[
-        Enter an instance's interactive Lua console.
+        Enter an instance's interactive Lua or SQL console.
+
+        Supported options:
+        * --language=language to set interactive console language.
+          May be either Lua or SQL.
 ]=],
             weight = 65,
             deprecated = false,
@@ -1284,6 +1306,7 @@ do
         { 'chdir',       'string'  },
         { 'only-server', 'string'  },
         { 'server',      'string'  },
+        { 'language',    'string'  },
     })
 
     local cmd_name
-- 
2.7.4