From 6489f77bb0d21085d4850951760ebe15b428a3b2 Mon Sep 17 00:00:00 2001
From: Vinicius Arcanjo <viniarck@gmail.com>
Date: Mon, 7 Jan 2019 23:07:20 -0200
Subject: [PATCH] - Handled NvimListenAddressException to allow genManifest -
 Cleaned up a few imports

---
 source/nvimhost/client.d | 21 ++++++++++-----
 source/nvimhost/plugin.d | 55 ++++++++++++++++++++++------------------
 2 files changed, 44 insertions(+), 32 deletions(-)

diff --git a/source/nvimhost/client.d b/source/nvimhost/client.d
index 5e5d24e..eb07ac1 100644
--- a/source/nvimhost/client.d
+++ b/source/nvimhost/client.d
@@ -61,7 +61,6 @@ struct MethodInfo {
 }
 
 struct NvimClient {
-    import std.stdio;
     import std.socket;
     import std.process : environment;
     import std.typecons;
@@ -71,7 +70,7 @@ struct NvimClient {
     import std.experimental.logger;
     import vibe.core.net;
     import eventcore.driver : IOMode;
-    import nvimhost.util;
+    import nvimhost.util : genSrcAddr;
 
 public:
     string nvimAddr;
@@ -382,16 +381,18 @@ public:
     }
 
     /**
-    Open an async TCP connection handler to Nvim using UnixAddress
+    Open an async TCP connection handler to Nvim using UnixAddress.
+
+    If NVIM_LISTEN_ADDRESS environment variable is not set throws
+    NvimListenAddressException.
+
     */
     void connect() {
         import std.path;
-        import std.conv;
-        import std.uuid;
-        import std.file;
+
         this.nvimAddr = environment.get("NVIM_LISTEN_ADDRESS", "");
         if (nvimAddr == "") {
-            throw new Exception("Couldn't get NVIM_LISTEN_ADDRESS, is nvim running?");
+            throw new NvimListenAddressException("Couldn't get NVIM_LISTEN_ADDRESS, is nvim running?");
         }
 
         auto unixAddr = new UnixAddress(nvimAddr);
@@ -403,3 +404,9 @@ public:
         tracef(logEnabled, "Main thread connected to nvim");
     }
 }
+
+class NvimListenAddressException : Exception {
+    this(string msg, string file = __FILE__, size_t line = __LINE__) {
+        super(msg, file, line);
+    }
+}
diff --git a/source/nvimhost/plugin.d b/source/nvimhost/plugin.d
index 4deeb16..b054c7c 100644
--- a/source/nvimhost/plugin.d
+++ b/source/nvimhost/plugin.d
@@ -29,7 +29,6 @@ exclusively used for exchanging call messages between the Plugin functions, comm
 struct NvimPlugin(Struct) {
     import nvimhost.client;
     import nvimhost.api;
-    import std.stdio;
     import std.traits;
     import std.meta : ApplyLeft, Filter;
     import std.variant;
@@ -42,8 +41,9 @@ struct NvimPlugin(Struct) {
     import std.uni : toLower;
     import vibe.core.net;
     import eventcore.driver : IOMode;
-    import nvimhost.util;
+    import nvimhost.util : genSrcAddr;
     import std.path;
+    import std.file;
 
 public:
     // Encapsulate Nvim API to facilitate for final consumers of this Class.
@@ -92,7 +92,6 @@ private:
     */
     void cbThread() {
         import msgpack;
-        import std.file;
         import std.uuid;
 
         srcAddr = genSrcAddr();
@@ -287,8 +286,6 @@ private:
 
     void ensureDirCreated(string filePath) {
         import std.range;
-        import std.file;
-        import std.path;
 
         auto folderPath = filePath.expandTilde.split(dirSeparator)[0 .. $ - 1];
         mkdirRecurse(folderPath.join(dirSeparator));
@@ -299,28 +296,39 @@ public:
     this(string pluginBinPath, string outManifestFilePath) {
         c = nvim.getClient();
         c.enableLog();
-        c.connect();
-        stc = Struct(nvim);
 
         ensureDirCreated(outManifestFilePath);
         genManifest!Struct(pluginBinPath, expandTilde(outManifestFilePath));
 
-        mTid = thisTid;
-        auto tcb = new Thread(&cbThread);
-        tcb.isDaemon(true);
-        tcb.start();
-
-        trace(c.logEnabled, "Waiting for cbThread message");
-        receiveOnly!string();
-        trace(c.logEnabled, "Received cbThread message");
-
-        immutable string loadedName = Struct.stringof.toLower;
-        logf(c.logEnabled, "Setting g:" ~ loadedName ~ "_channel" ~ "=" ~ to!string(chId));
-        c.call!(void)("nvim_command", "let g:" ~ loadedName ~ "_channel" ~ "=" ~ to!string(chId));
-        trace(c.logEnabled, "Plugin " ~ loadedName ~ " is ready!");
+        try {
+            c.connect();
+            stc = Struct(nvim);
+
+            mTid = thisTid;
+            auto tcb = new Thread(&cbThread);
+            tcb.isDaemon(true);
+            tcb.start();
+
+            trace(c.logEnabled, "Waiting for cbThread message");
+            receiveOnly!string();
+            trace(c.logEnabled, "Received cbThread message");
+
+            immutable string loadedName = Struct.stringof.toLower;
+            logf(c.logEnabled, "Setting g:" ~ loadedName ~ "_channel" ~ "=" ~ to!string(chId));
+            c.call!(void)("nvim_command", "let g:" ~ loadedName ~ "_channel" ~ "=" ~ to!string(chId));
+            trace(c.logEnabled, "Plugin " ~ loadedName ~ " is ready!");
+        } catch(NvimListenAddressException e) {
+            import std.stdio : writeln;
+            import core.stdc.stdlib;
+
+            writeln(e.msg);
+            error(c.logEnabled, e.msg);
+            writeln("The manifest file has been written to " ~ expandTilde(outManifestFilePath));
+            exit(1);
+        }
     }
 
-    ~this(){
+    ~this() {
         close();
     }
 
@@ -342,7 +350,7 @@ public:
     You should only call keepRunning if you don't have an inifinite loop in your void main(), for example:
 
     void main(){
-        auto p = new NvimPlugin!MyPluginClassHere;
+        auto p = new NvimPlugin!(PluginStruct)();
         scope(exit) p.keepRunning();
     }
     */
@@ -363,9 +371,6 @@ public:
     void genManifest(Struct)(string binExecutable, string outputFile, string autoCmdPattern = "*") {
         import std.stdio : writeln, File;
         import std.string : format;
-        import std.uni : toLower;
-        import std.file;
-        import std.path;
 
         immutable string loadedName = Struct.stringof.toLower;
         // 1 -> loadedName