Merged in tbasnoopy/premake-dev/extension replace (pull request #148)

add replaceextension function for paths

CHANGES.txt

@@ -27,3 +27,4 @@ Since 5.0-alpha1:
 * Embedded scripts now compressed with LuaSrcDiet (Oliver Schneider)
 * Checks to prevent self-linking (Mark Chandler)
 * os.rmdir() can now removes dotted subdirectories (Alexey Orlov)
+* Added path.replaceextension() (M Skibbe)

CONTRIBUTORS.txt

@@ -23,6 +23,8 @@ Patch contributors:
     * Prevent self-linking
   Mihai Sebea <http://twitter.com/mihai_sebea>
     * Xcode exporter fixes and improvements
+  M Skibbe
+    * path.replaceextension()
   Oliver Schneider
     * compress embedded scripts with LuaSrcDiet
   Renaud Guillard <https://bitbucket.org/noresources>

src/base/path.lua

@@ -210,6 +210,27 @@
 	end
 
 
+
+--
+-- Replace the file extension.
+--
+
+	function path.replaceextension(p, newext)
+		local ext = path.getextension(p)
+
+		if not ext then
+			return p
+		end
+
+		if not newext:findlast(".", true) then
+			newext = "."..newext
+		end
+
+		return p:match("^(.*)"..ext.."$")..newext
+	end
+
+
+
 --
 -- Converts from a simple wildcard syntax, where * is "match any"
 -- and ** is "match recursive", to the corresponding Lua pattern.

tests/base/test_path.lua

@@ -298,6 +298,32 @@
 	end
 
 
+--
+-- path.replaceextension() tests
+--
+
+	function suite.getabsolute_replaceExtension()
+		test.isequal("/AB.foo", path.replaceextension("/AB.exe","foo"))
+	end
+
+	function suite.getabsolute_replaceExtensionWithDot()
+		test.isequal("/AB.foo", path.replaceextension("/AB.exe",".foo"))
+	end
+
+	function suite.getabsolute_replaceExtensionWithDotMultipleDots()
+			test.isequal("/nunit.framework.foo", path.replaceextension("/nunit.framework.dll",".foo"))
+	end
+
+	function suite.getabsolute_replaceExtensionCompletePath()
+			test.isequal("/nunit/framework/main.foo", path.replaceextension("/nunit/framework/main.cpp",".foo"))
+	end
+
+	function suite.getabsolute_replaceExtensionWithoutExtension()
+			test.isequal("/nunit/framework/main.foo", path.replaceextension("/nunit/framework/main",".foo"))
+	end
+
+
+
 --
 -- path.translate() tests
 --