cli_validators.rs 1.2 KB

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  1. //! Functions to be used for clap::Arg::validator()
  2. //! to validate arguments
  3. use std::path::PathBuf;
  4. use boolinator::Boolinator;
  5. pub fn is_existing_path(s: String) -> Result<(), String> {
  6. PathBuf::from(s.clone()).exists().as_result((), format!("Not a File or Directory: {}", s))
  7. }
  8. pub fn is_file(s: String) -> Result<(), String> {
  9. PathBuf::from(s.clone()).is_file().as_result((), format!("Not a File: {}", s))
  10. }
  11. pub fn is_directory(s: String) -> Result<(), String> {
  12. PathBuf::from(s.clone()).is_dir().as_result((), format!("Not a Directory: {}", s))
  13. }
  14. pub fn is_integer(s: String) -> Result<(), String> {
  15. use std::str::FromStr;
  16. let i : Result<i64, _> = FromStr::from_str(&s);
  17. i.map(|_| ()).map_err(|_| format!("Not an integer: {}", s))
  18. }
  19. pub fn is_url(s: String) -> Result<(), String> {
  20. use url::Url;
  21. Url::parse(&s).map(|_| ()).map_err(|_| format!("Not a URL: {}", s))
  22. }
  23. pub fn is_tag(s: String) -> Result<(), String> {
  24. use regex::Regex;
  25. lazy_static! { static ref TAG_RE : Regex = Regex::new("[:alpha:][:word:]*").unwrap(); }
  26. TAG_RE
  27. .is_match(&s)
  28. .as_result((), format!("Not a valid Tag: '{}' - Valid is [a-zA-Z][0-9a-zA-Z]*", s))
  29. }