From a6129643fa875bae900e73ce7e8a2e8c7ade65ec Mon Sep 17 00:00:00 2001
From: Marcus Ottosson <konstruktion@gmail.com>
Date: Mon, 6 Apr 2015 11:16:44 +0100
Subject: [PATCH] Added lib.where

---
 pyblish/lib.py                                | 32 +++++++++++++++++++
 .../tests/plugins/full/validate_instances.py  |  2 +-
 pyblish/tests/test_lib.py                     | 10 ++++++
 pyblish/tests/{test_main.py => test_util.py}  | 10 ++++--
 4 files changed, 51 insertions(+), 3 deletions(-)
 create mode 100644 pyblish/tests/test_lib.py
 rename pyblish/tests/{test_main.py => test_util.py} (90%)

diff --git a/pyblish/lib.py b/pyblish/lib.py
index bb2996ea..861fd096 100644
--- a/pyblish/lib.py
+++ b/pyblish/lib.py
@@ -207,3 +207,35 @@ def _resolve_name(name, package, level):
     __import__(name)
 
     return sys.modules[name]
+
+
+def where(program):
+    r"""Parse PATH for executables
+
+    Windows note:
+        PATHEXT yields possible suffixes, such as .exe, .bat and .cmd
+
+    Usage:
+        >> where("python")
+        'c:\\python27\\python.exe'
+
+    """
+
+    suffixes = [""]
+
+    try:
+        # Append Windows suffixes, such as .exe, .bat and .cmd
+        suffixes.extend(os.environ.get("PATHEXT").split(os.pathsep))
+    except:
+        pass
+
+    for path in os.environ["PATH"].split(os.pathsep):
+
+        # A path may be empty.
+        if not path:
+            continue
+
+        for suffix in suffixes:
+            full_path = os.path.join(path, program + suffix)
+            if os.path.isfile(full_path):
+                return full_path
diff --git a/pyblish/tests/plugins/full/validate_instances.py b/pyblish/tests/plugins/full/validate_instances.py
index f0323b0a..3b01f77a 100644
--- a/pyblish/tests/plugins/full/validate_instances.py
+++ b/pyblish/tests/plugins/full/validate_instances.py
@@ -3,7 +3,7 @@
 
 
 @pyblish.api.log
-class ValidateInstance(pyblish.api.Validator):
+class ValidateInstances(pyblish.api.Validator):
     hosts = ['python']
     families = ['full']
     version = (0, 1, 0)
diff --git a/pyblish/tests/test_lib.py b/pyblish/tests/test_lib.py
new file mode 100644
index 00000000..83c690a6
--- /dev/null
+++ b/pyblish/tests/test_lib.py
@@ -0,0 +1,10 @@
+import sys
+import pyblish.lib
+
+from pyblish.vendor.nose.tools import *
+
+
+def test_where():
+    """lib.where works fine"""
+    exe = pyblish.lib.where("python")
+    assert_equals(sys.executable.lower(), exe.lower())
diff --git a/pyblish/tests/test_main.py b/pyblish/tests/test_util.py
similarity index 90%
rename from pyblish/tests/test_main.py
rename to pyblish/tests/test_util.py
index a517aef7..b4df1bcc 100644
--- a/pyblish/tests/test_main.py
+++ b/pyblish/tests/test_util.py
@@ -12,8 +12,14 @@
 @with_setup(setup_full, teardown)
 def test_publish_all(_):
     """publish() calls upon each convenience function"""
-    ctx = pyblish.plugin.Context()
-    pyblish.util.publish(context=ctx)
+    plugins = pyblish.plugin.discover()
+
+    assert "ConformInstances" in [p.__name__ for p in plugins]
+    assert "SelectInstances" in [p.__name__ for p in plugins]
+    assert "ValidateInstances" in [p.__name__ for p in plugins]
+    assert "ExtractInstances" in [p.__name__ for p in plugins]
+
+    ctx = pyblish.util.publish()
 
     for inst in ctx:
         assert inst.data('selected') is True