Why doesn't gradle exec work with scripts? - gradle

Question

Is there any way to make gradle exec work like a shell exec? ie - understand executable files in the path?
We have code that needs to work on windows and unix - and many many scripts that are obviously different on both machines. While I can do a hack like this:
npmCommand = Os.isFamily(Os.FAMILY_WINDOWS) ? 'npm.cmd' : '/usr/local/bin/npm'
and then run that command - the paths for some scripts are not necessarily set in stone - and it's just horrible code.
Is there any way to fix the problem - ie extend the exec task to find executable files in the path and run them?

Answer 1

How about something like:
if (System.getProperty('os.name').toLowerCase(Locale.ROOT).contains('windows'))
{
commandLine 'cmd', '/c', 'commandGoesHere'
}
else
{
commandLine 'sh', '-c', 'commandGoesHere'
}

Answer 2

I'd love a better way - but I made a simple function that I put in our common that you use like this:
exec {
commandLine command("npm"), "install"
}
the function looks like this:
//
// find a command with this name in the path
//
String command( String name )
{
def onWindows = (System.env.PATH==null);
def pathBits = onWindows ? System.env.Path.split(";") : System.env.PATH.split(":");
def isMatch = onWindows ? {path ->
for (String extension : System.env.PATHEXT.split(";"))
{
File theFile = new File( path, name + extension);
if (theFile.exists())
return theFile;
}
return null;
} : {path -> def file = new File(path,name);if (file.exists() && file.canExecute()) return file;return null;}
def foundLocal = isMatch(file("."));
if (foundLocal)
return foundLocal;
for (String pathBit : pathBits)
{
def found = isMatch(pathBit);
if (found)
return found;
}
throw new RuntimeException("Failed to find " + name + " in the path")
}