1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 #[deriving(Show, Clone)]
14 pub struct LogDirective {
15 pub name: Option<~str>,
19 static LOG_LEVEL_NAMES: [&'static str, ..4] = ["error", "warn", "info",
22 /// Parse an individual log level that is either a number or a symbolic log level
23 fn parse_log_level(level: &str) -> Option<u32> {
24 from_str::<u32>(level).or_else(|| {
25 let pos = LOG_LEVEL_NAMES.iter().position(|&name| name == level);
26 pos.map(|p| p as u32 + 1)
27 }).map(|p| cmp::min(p, ::MAX_LOG_LEVEL))
30 /// Parse a logging specification string (e.g: "crate1,crate2::mod3,crate3::x=1")
31 /// and return a vector with log directives.
33 /// Valid log levels are 0-255, with the most likely ones being 1-4 (defined in
34 /// std::). Also supports string log levels of error, warn, info, and debug
35 pub fn parse_logging_spec(spec: &str) -> Vec<LogDirective> {
36 let mut dirs = Vec::new();
37 for s in spec.split(',') {
38 if s.len() == 0 { continue }
39 let mut parts = s.split('=');
40 let (log_level, name) = match (parts.next(), parts.next(), parts.next()) {
41 (Some(part0), None, None) => {
42 // if the single argument is a log-level string or number,
43 // treat that as a global fallback
44 match parse_log_level(part0) {
45 Some(num) => (num, None),
46 None => (::MAX_LOG_LEVEL, Some(part0)),
49 (Some(part0), Some(part1), None) => {
50 match parse_log_level(part1) {
51 Some(num) => (num, Some(part0)),
53 println!("warning: invalid logging spec '{}', \
60 println!("warning: invalid logging spec '{}', \
65 dirs.push(LogDirective {
66 name: name.map(|s| s.to_owned()),
75 use super::parse_logging_spec;
78 fn parse_logging_spec_valid() {
79 let dirs = parse_logging_spec("crate1::mod1=1,crate1::mod2,crate2=4");
80 let dirs = dirs.as_slice();
81 assert_eq!(dirs.len(), 3);
82 assert_eq!(dirs[0].name, Some(~"crate1::mod1"));
83 assert_eq!(dirs[0].level, 1);
85 assert_eq!(dirs[1].name, Some(~"crate1::mod2"));
86 assert_eq!(dirs[1].level, ::MAX_LOG_LEVEL);
88 assert_eq!(dirs[2].name, Some(~"crate2"));
89 assert_eq!(dirs[2].level, 4);
93 fn parse_logging_spec_invalid_crate() {
94 // test parse_logging_spec with multiple = in specification
95 let dirs = parse_logging_spec("crate1::mod1=1=2,crate2=4");
96 let dirs = dirs.as_slice();
97 assert_eq!(dirs.len(), 1);
98 assert_eq!(dirs[0].name, Some(~"crate2"));
99 assert_eq!(dirs[0].level, 4);
103 fn parse_logging_spec_invalid_log_level() {
104 // test parse_logging_spec with 'noNumber' as log level
105 let dirs = parse_logging_spec("crate1::mod1=noNumber,crate2=4");
106 let dirs = dirs.as_slice();
107 assert_eq!(dirs.len(), 1);
108 assert_eq!(dirs[0].name, Some(~"crate2"));
109 assert_eq!(dirs[0].level, 4);
113 fn parse_logging_spec_string_log_level() {
114 // test parse_logging_spec with 'warn' as log level
115 let dirs = parse_logging_spec("crate1::mod1=wrong,crate2=warn");
116 let dirs = dirs.as_slice();
117 assert_eq!(dirs.len(), 1);
118 assert_eq!(dirs[0].name, Some(~"crate2"));
119 assert_eq!(dirs[0].level, ::WARN);
123 fn parse_logging_spec_global() {
124 // test parse_logging_spec with no crate
125 let dirs = parse_logging_spec("warn,crate2=4");
126 let dirs = dirs.as_slice();
127 assert_eq!(dirs.len(), 2);
128 assert_eq!(dirs[0].name, None);
129 assert_eq!(dirs[0].level, 2);
130 assert_eq!(dirs[1].name, Some(~"crate2"));
131 assert_eq!(dirs[1].level, 4);