CLI: Started implementing CLI configuration setup.

cli/src/main/groovy/com/jdbernard/wdiwtlt/cli/CommandLineInterface.groovy

@@ -1,14 +1,24 @@
-package com.jdbernard.wdiwtlt.interfaces
+package com.jdbernard.wdiwtlt.cli
+
+import com.jdbernard.wdiwtlt.ConfigWrapper
+import com.jdbernard.wdiwtlt.MediaLibrary
+import com.jdbernard.wdiwtlt.db.ORM
+import com.jdbernard.io.NonBlockingInputStreamReader
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import org.docopt.Docopt
 
 public class CommandLineInterface {
 
-    public static final VERSION = "alpha"
+    public static final VERSION = "ALPHA"
 
     public static final def DOC = """\
 wdiwtlt v$VERSION
 
 Usage:
     wdiwtlt [options]
+    wdiwtlt --version
+    wdiwtlt --help
 
 Options:
     -L --library-root <root-dir>
@@ -16,13 +26,73 @@ Options:
         The path to a local media library directory. Providing a local library
         causes wdiwtlt to run in local mode.
 
+    -D --database-config <config-file>
+
+        The path to a data source configuration file. wdiwtlt cli uses HikariCP
+        for database connection pooling, so the given configuration file is
+        expected to be formatted so that it can be fed directly to the
+        HikariConfig constructor.
+        (see https://github.com/brettwooldridge/HikariCP#configuration-knobs-baby)
+
 Configuration:
 """
 
+    private MediaLibrary library
+
     public static void main(String[] args) {
 
         def opts = new Docopt(DOC).withVersion("wdiwtlt v$VERSION").parse(args)
 
         println opts
+
+        def exitErr = { msg ->
+            System.out.err.println("wdiwtlt: $msg")
+            System.exit(1) }
+
+        def wdiwtltCfg = new ConfigWrapper()
+
+        // Get the library root (if local)
+        File libRoot = opts["--library-root"] ?
+            new File(opts["--library-root"]) :
+            new File(wdiwtltCfg.libraryRootPath)
+
+        if (libRoot && (!libRoot.exist() || !libRoot.isDirectory()))
+            exitErr("Library root does not exist or is not a directory: " +
+                libRoot.canonicalPath)
+
+        // Get the library database
+        HikariConfig hcfg
+        File dbCfgFile = opts["--database-config"] ?
+            new File(opts["--database-config"]) : null
+
+        if (dbCfgFile && dbCfgFile.exists() && dbCfgFile.isFile()) {
+            Properties props = new Properties()
+            try { dbCfgFile.withInputStream { props.load(it) } }
+            catch (Exception e) { props.clear() }
+
+            if (props) hcfg = new HikariConfig(props) }
+
+        if (!hcfg) hcfg = wdiwtltCfg.hikariConfig
+        if (!hcfg) exitErr("Cannot load database configuation.")
+
+        // Create our database instance
+        def orm
+        try {
+            def hds = new HikariDataSource(hcfg)
+            orm = new ORM(hds) }
+        catch (Exception e) {
+            exitErr("Could not establish a connection to the database:\n\t" +
+                e.localizedMessage) }
+
+        // Create our CLI object
+        def cliInst = new CommandLineInterface(new MediaLibrary(orm, libRoot))
+        cliInst.repl()
+    }
+
+    public CommandLineInterface(MediaLibrary library) {
+        this.library = library
+    }
+
+    public void repl(InputStream sin, PrintStream out) {
     }
 }