[#372] add support for jdbc + postgres

deps.edn

@@ -11,7 +11,9 @@
         org.clojure/data.xml {:mvn/version "0.2.0-alpha6"}
         fipp {:mvn/version "0.6.22"}
         clj-commons/clj-yaml {:mvn/version "0.7.1"}
-        com.cognitect/transit-clj {:mvn/version "1.0.324"}}
+        com.cognitect/transit-clj {:mvn/version "1.0.324"}
+        seancorfield/next.jdbc {:mvn/version "1.0.424"}
+        org.postgresql/postgresql {:mvn/version "42.2.5"}}
  :aliases {:main
            {:main-opts ["-m" "babashka.main"]}
            :profile

doc/dev.md

@@ -62,6 +62,9 @@ $ BABASHKA_XMX="-J-Xmx4g" script/compile
 Keep notes here about how adding libraries and classes to Babashka affects the binary size.
 We're registering the size of the macOS binary (as built on CircleCI).
 
+2020/04/23 Added `next.jdbc` and postgres JDBC driver:
+(- 51019836 48099780) = 2920kb added
+
 2020/04/23 Added BigDecimal
 (- 48103868 47857732) = 246kb added
 

project.clj

@@ -23,7 +23,9 @@
                  [cheshire "5.10.0"]
                  [fipp "0.6.22"]
                  [clj-commons/clj-yaml "0.7.1"]
-                 [com.cognitect/transit-clj "1.0.324"]]
+                 [com.cognitect/transit-clj "1.0.324"]
+                 [seancorfield/next.jdbc "1.0.424"]
+                 [org.postgresql/postgresql "42.2.5"]]
   :profiles {:test {:dependencies [[clj-commons/conch "0.9.2"]
                                    [com.clojure-goes-fast/clj-async-profiler "0.4.0"]]}
              :uberjar {:global-vars {*assert* false}

script/compile

@@ -46,6 +46,7 @@ args=( -jar $BABASHKA_JAR \
             --no-fallback \
             --no-server \
             --report-unsupported-elements-at-runtime \
+            "--initialize-at-run-time=org.postgresql.sspi.SSPIClient" \
             "$BABASHKA_XMX" )
 
 if [ "$BABASHKA_STATIC" = "true" ]; then

src/babashka/impl/jdbc.clj

@@ -0,0 +1,31 @@
+(ns babashka.impl.jdbc
+  {:no-doc true}
+  (:require [next.jdbc :as njdbc]
+            [sci.impl.namespaces :refer [copy-var]]
+            [sci.impl.vars :as vars]))
+
+(def next-ns (vars/->SciNamespace 'next.jdbc nil))
+
+(defn with-transaction
+  "Given a transactable object, gets a connection and binds it to `sym`,
+  then executes the `body` in that context, committing any changes if the body
+  completes successfully, otherwise rolling back any changes made.
+  The options map supports:
+  * `:isolation` -- `:none`, `:read-committed`, `:read-uncommitted`,
+      `:repeatable-read`, `:serializable`,
+  * `:read-only` -- `true` / `false`,
+  * `:rollback-only` -- `true` / `false`."
+  [_ _ [sym transactable opts] & body]
+  (let [con (vary-meta sym assoc :tag 'java.sql.Connection)]
+    `(next.jdbc/transact ~transactable (^{:once true} fn* [~con] ~@body) ~(or opts {}))))
+
+(def njdbc-namespace
+  {'get-datasource (copy-var njdbc/get-datasource next-ns)
+   'execute! (copy-var njdbc/execute! next-ns)
+   'execute-one! (copy-var njdbc/execute-one! next-ns)
+   'get-connection (copy-var njdbc/get-connection next-ns)
+   'plan (copy-var njdbc/plan next-ns)
+   'prepare (copy-var njdbc/prepare next-ns)
+   'transact (copy-var njdbc/transact next-ns)
+   'with-transaction (with-meta with-transaction
+                       {:sci/macro true})})

src/babashka/main.clj

@@ -15,6 +15,7 @@
    [babashka.impl.common :as common]
    [babashka.impl.csv :as csv]
    [babashka.impl.curl :refer [curl-namespace]]
+   [babashka.impl.jdbc :as jdbc]
    [babashka.impl.nrepl-server :as nrepl-server]
    [babashka.impl.pipe-signal-handler :refer [handle-pipe! pipe-signal-received?]]
    [babashka.impl.repl :as repl]
@@ -257,7 +258,8 @@ Everything after that is bound to *command-line-args*."))
     yaml clj-yaml.core
     curl babashka.curl
     transit cognitect.transit
-    bencode bencode.core})
+    bencode bencode.core
+    jdbc next.jdbc})
 
 (def cp-state (atom nil))
 
@@ -292,7 +294,8 @@ Everything after that is bound to *command-line-args*."))
    'clojure.pprint pprint-namespace
    'babashka.curl curl-namespace
    'cognitect.transit transit-namespace
-   'bencode.core bencode-namespace})
+   'bencode.core bencode-namespace
+   'next.jdbc jdbc/njdbc-namespace})
 
 (def bindings
   {'java.lang.System/exit exit ;; override exit, so we have more control