path_env

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// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.
 
#ifndef tools_path_env
#define tools_path_env
 
#include "put_env"
 
#include "num2s"
#include "words"
#include "sep"
#include "vmanip"
 
namespace tools {
 
inline bool env_append(const std::string& a_env,const std::string& a_sep,const std::vector<std::string>& a_vals){
  std::string env_value;
  if(is_env(a_env)) {
    if(!get_env(a_env,env_value)) return false;
  }
 
 {std::vector<std::string>::const_iterator it;
  for(it=a_vals.begin();it!=a_vals.end();++it) {
    const std::string& value = *it;
    if(value.empty()) continue;
 
    if(env_value.size()) {
      std::vector<std::string> ws;
      words(env_value,a_sep,false,ws);
      // Remove existing one, so that value be put at end.
      remove(ws,value);
      if(!nums2s<std::string>(ws,env_value,a_sep)) {}
    }
 
    if(env_value.size()) env_value += a_sep;
    env_value += value;
  }}
 
  if(!put_env(a_env,env_value)) return false;
 
  return true;
}
 
inline bool env_path_append(const std::string& a_env,const std::vector<std::string>& a_paths){
  return env_append(a_env,psep(),a_paths);
}
 
inline bool env_append_path(const std::string& a_env,const std::string& a_path){
  std::vector<std::string> v;
  v.push_back(a_path);
  return env_append(a_env,psep(),v);
}
 
}
 
#endif