misc/vim: inform the user when no results are found

[nit.git] / lib / standard / environ.nit

diff --git a/lib/standard/environ.nit b/lib/standard/environ.nit
index d8ab867..2f6ae46 100644 (file)
--- a/lib/standard/environ.nit
+++ b/lib/standard/environ.nit
@@ -11,32 +11,52 @@
 # You  are  allowed  to  redistribute it and sell it, alone or is a part of
 # another product.
 
-import symbol
+# Access to the environment variables of the process
+module environ
+
+import string
+import file
 
 # TODO prevoir une structure pour recup tout un environ, le modifier et le passer a process
 
-redef class Symbol
-       # Return environement valued for this symbol
-       meth environ: String
+redef class String
+       # Return environment value for the symbol.
+       # If there is no such environment variable, then return ""
+       #
+       #     assert "PATH".environ     != ""
+       #     assert "NIT %\n".environ  == ""
+       fun environ: String
        do
-               environ_default = "" # FIXME: Why this ?!?
-               return new String.from_cstring(to_s.to_cstring.get_environ)
+               var res = self.to_cstring.get_environ
+               # FIXME: There is no proper way to handle NULL C string yet. What a pitty.
+               var nulstr = once ("".to_cstring.get_environ)
+               if res != nulstr then
+                       return res.to_s
+               else
+                       return ""
+               end
        end
 
-       # set environement value for this symbol
-       meth environ=(v: String) do to_s.to_cstring.set_environ(v.to_cstring, 1)
-       
-       # set default environement value for this symbol
-       meth environ_default=(v: String) do to_s.to_cstring.set_environ(v.to_cstring, 0)
-               
-       # Unset the environement value of this symbol
-       meth unset do to_s.to_cstring.unset_environ
+       # Set the enviroment value of a variable.
+       #
+       #     "NITis".setenv("fun")
+       #     assert "NITis".environ  == "fun"
+       fun setenv(v: String) do to_cstring.setenv( v.to_cstring )
+
+       # Search for the program `self` in all directories from `PATH`
+       fun program_is_in_path: Bool
+       do
+               var full_path = "PATH".environ
+               var paths = full_path.split(":")
+               for path in paths do if path.file_exists then
+                       if path.join_path(self).file_exists then return true
+               end
+
+               return false
+       end
 end
 
 redef class NativeString
-# Refinned to add environement bindings
-       private meth get_environ: NativeString is extern "string_NativeString_NativeString_get_environ_0"
-       private meth put_environ is extern "string_NativeString_NativeString_put_environ_0" # this one is a bit compilcated to use ... so we dosen't use
-       private meth unset_environ is extern "string_NativeString_NativeString_unset_environ_0"
-       private meth set_environ(value : NativeString, overwrite : Int) is extern "string_NativeString_NativeString_set_environ_2"
+       private fun get_environ: NativeString is extern "string_NativeString_NativeString_get_environ_0"
+       private fun setenv( v : NativeString ) is extern "string_NativeString_NativeString_setenv_1"
 end