add support for custom path locators

do_what.py

@@ -14,6 +14,7 @@ list_directory="ls --color=auto"
 change_dir="cd"
 print_dir="pwd"
 help_command="man"
+path_locator="which"
 
 # general function for setting a shell's environment variable
 def set_runtime_var(name, value, options=""):
@@ -34,8 +35,20 @@ def is_binary_file(filepathname):
 
 # check if a given program is in the path environment using which
 def env_has(program):
-	whichcall = subprocess.Popen(['which', program], stdout=subprocess.PIPE)
-	return whichcall.returncode
+    def is_exe(fpath):
+        return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+    fpath, fname = os.path.split(program)
+    if fpath:
+        if is_exe(program):
+            return True
+    else:
+        for path in os.environ["PATH"].split(os.pathsep):
+            exe_file = os.path.join(path, program)
+            if is_exe(exe_file):
+                return True
+
+    return None
 
 # get the number of lines in a file
 def file_len(fname):
@@ -62,6 +75,8 @@ if ( os.path.isfile(ENV_HOME+'/.config/do_what/what.config') ):
 			list_directory = config['DEFAULT']['list_directory']
 		if ( 'help_command' in config['DEFAULT'] ):
 			help_command = config['DEFAULT']['help_command']
+		if ( 'path_locator' in config['DEFAULT'] ):
+			path_locator = config['DEFAULT']['path_locator']
 else:
 	config = configparser.ConfigParser()
 	config['DEFAULT'] = {
@@ -70,6 +85,7 @@ else:
 		'pretty_print_file': pretty_print_file,
 		'print_file': print_file,
 		'help_command': help_command,
+		'path_locator': path_locator,
 	}
 	print("echo Default config loaded.")
 	with open(ENV_HOME+'/.config/do_what/what.config', 'w') as configfile:
@@ -129,14 +145,12 @@ elif ( (not active and len(sys.argv) == 2) or (active and len(sys.argv) == 3) ):
 		
 	else:
 		# check if file is a path program, then list using which/man on active
-		whichcall = subprocess.Popen(['which', filearg], stdout=subprocess.PIPE)
-		result = whichcall.communicate()[0]
-		statuscode = whichcall.returncode
+		path_has = env_has(filearg)
 		# print the location of the program
-		if ( int(statuscode) == 0 and not active ):
-			print("echo "+result.decode('utf-8'))
+		if ( path_has and not active ):
+			print(path_locator+" "+filearg)
 		# display the help page for the program (active)
-		elif ( int(statuscode) == 0 and active ):
+		elif ( path_has and active ):
 			print(help_command+" "+filearg)
 		else:
 			print("echo Unknown file/directory.")