From 26d99d288eb2def9ef1f50c0b4dd06f7e4f986d7 Mon Sep 17 00:00:00 2001
From: Dominik Picheta <dominikpicheta@gmail.com>
Date: Thu, 24 Dec 2015 10:58:02 +0000
Subject: [PATCH] Fixes #108.

---
 src/nimble.nim                 |  4 ++++
 tests/issue108/issue108.nimble | 11 +++++++++++
 tests/tester.nim               |  7 +++++++
 3 files changed, 22 insertions(+)
 create mode 100644 tests/issue108/issue108.nimble

diff --git a/src/nimble.nim b/src/nimble.nim
index 45f7eab..7817dfd 100644
--- a/src/nimble.nim
+++ b/src/nimble.nim
@@ -527,6 +527,10 @@ proc processDeps(pkginfo: PackageInfo, options: Options): seq[string] =
 
 proc buildFromDir(pkgInfo: PackageInfo, paths: seq[string], forRelease: bool) =
   ## Builds a package as specified by ``pkgInfo``.
+  if pkgInfo.bin.len == 0:
+    raise newException(NimbleError,
+        "Nothing to build. Did you specify a module to build using the" &
+        " `bin` key in your .nimble file?")
   let realDir = pkgInfo.getRealDir()
   let releaseOpt = if forRelease: "-d:release" else: ""
   var args = ""
diff --git a/tests/issue108/issue108.nimble b/tests/issue108/issue108.nimble
new file mode 100644
index 0000000..8b2fa29
--- /dev/null
+++ b/tests/issue108/issue108.nimble
@@ -0,0 +1,11 @@
+# Package
+
+version       = "0.1.0"
+author        = "Dominik Picheta"
+description   = "Test for issue 108."
+license       = "BSD"
+
+# Dependencies
+
+requires "nim >= 0.12.1"
+
diff --git a/tests/tester.nim b/tests/tester.nim
index 83b3833..19173e6 100644
--- a/tests/tester.nim
+++ b/tests/tester.nim
@@ -78,6 +78,13 @@ test "issue #126":
     check exitCode1 != QuitSuccess
     check "The .nimble file name must match name specified inside it." in lines1[^1]
 
+test "issue #108":
+  cd "issue108":
+    let (output, exitCode) = execCmdEx("../" & path & " build")
+    let lines = output.strip.splitLines()
+    check exitCode != QuitSuccess
+    check "Nothing to build" in lines[^1]
+
 test "can list":
   check execCmdEx(path & " list").exitCode == QuitSuccess