Vendor things

third-party/vendor/semver-parser/src/common.rs

@@ -0,0 +1,66 @@
+use version::Identifier;
+use recognize::{Recognize, Alt, OneOrMore, Inclusive, OneByte};
+use std::str::from_utf8;
+
+// by the time we get here, we know that it's all valid characters, so this doesn't need to return
+// a result or anything
+fn parse_meta(s: &str) -> Vec<Identifier> {
+    // Originally, I wanted to implement this method via calling parse, but parse is tolerant of
+    // leading zeroes, and we want anything with leading zeroes to be considered alphanumeric, not
+    // numeric. So the strategy is to check with a recognizer first, and then call parse once
+    // we've determined that it's a number without a leading zero.
+    s.split(".")
+        .map(|part| {
+            // another wrinkle: we made sure that any number starts with a
+            // non-zero. But there's a problem: an actual zero is a number, yet
+            // gets left out by this heuristic. So let's also check for the
+            // single, lone zero.
+            if is_alpha_numeric(part) {
+                Identifier::AlphaNumeric(part.to_string())
+            } else {
+                // we can unwrap here because we know it is only digits due to the regex
+                Identifier::Numeric(part.parse().unwrap())
+            }
+        }).collect()
+}
+
+// parse optional metadata (preceded by the prefix character)
+pub fn parse_optional_meta(s: &[u8], prefix_char: u8)-> Result<(Vec<Identifier>, usize), String> {
+    if let Some(len) = prefix_char.p(s) {
+        let start = len;
+        if let Some(len) = letters_numbers_dash_dot(&s[start..]) {
+            let end = start + len;
+            Ok((parse_meta(from_utf8(&s[start..end]).unwrap()), end))
+        } else {
+            Err("Error parsing prerelease".to_string())
+        }
+    } else {
+        Ok((Vec::new(), 0))
+    }
+}
+
+pub fn is_alpha_numeric(s: &str) -> bool {
+    if let Some((_val, len)) = numeric_identifier(s.as_bytes()) {
+        // Return true for number with leading zero
+        // Note: doing it this way also handily makes overflow fail over.
+        len != s.len()
+    } else {
+        true
+    }
+}
+
+// Note: could plumb overflow error up to return value as Result
+pub fn numeric_identifier(s: &[u8]) -> Option<(u64, usize)> {
+    if let Some(len) = Alt(b'0', OneOrMore(Inclusive(b'0'..b'9'))).p(s) {
+        from_utf8(&s[0..len]).unwrap().parse().ok().map(|val| (val, len))
+    } else {
+        None
+    }
+}
+
+pub fn letters_numbers_dash_dot(s: &[u8]) -> Option<usize> {
+    OneOrMore(OneByte(|c| c == b'-' || c == b'.' ||
+        (b'0' <= c && c <= b'9') ||
+        (b'a' <= c && c <= b'z') ||
+        (b'A' <= c && c <= b'Z'))).p(s)
+}

third-party/vendor/semver-parser/src/lib.rs

@@ -0,0 +1,8 @@
+pub mod version;
+pub mod range;
+
+// for private stuff the two share
+mod common;
+
+// for recognizer combinators
+mod recognize;

third-party/vendor/semver-parser/src/range.rs

@@ -0,0 +1,696 @@
+use common::{self, numeric_identifier, letters_numbers_dash_dot};
+use version::Identifier;
+use std::str::{FromStr, from_utf8};
+use recognize::*;
+
+#[derive(Debug)]
+pub struct VersionReq {
+    pub predicates: Vec<Predicate>,
+}
+
+#[derive(PartialEq,Debug)]
+pub enum WildcardVersion {
+    Major,
+    Minor,
+    Patch,
+}
+
+#[derive(PartialEq,Debug)]
+pub enum Op {
+    Ex, // Exact
+    Gt, // Greater than
+    GtEq, // Greater than or equal to
+    Lt, // Less than
+    LtEq, // Less than or equal to
+    Tilde, // e.g. ~1.0.0
+    Compatible, // compatible by definition of semver, indicated by ^
+    Wildcard(WildcardVersion), // x.y.*, x.*, *
+}
+
+impl FromStr for Op {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Op, String> {
+        match s {
+            "=" => Ok(Op::Ex),
+            ">" => Ok(Op::Gt),
+            ">=" => Ok(Op::GtEq),
+            "<" => Ok(Op::Lt),
+            "<=" => Ok(Op::LtEq),
+            "~" => Ok(Op::Tilde),
+            "^" => Ok(Op::Compatible),
+            _ => Err(String::from("Could not parse Op")),
+        }
+    }
+}
+
+#[derive(PartialEq,Debug)]
+pub struct Predicate {
+    pub op: Op,
+    pub major: u64,
+    pub minor: Option<u64>,
+    pub patch: Option<u64>,
+    pub pre: Vec<Identifier>,
+}
+
+fn numeric_or_wild(s: &[u8]) -> Option<(Option<u64>, usize)> {
+    if let Some((val, len)) = numeric_identifier(s) {
+        Some((Some(val), len))
+    } else if let Some(len) = OneOf(b"*xX").p(s) {
+        Some((None, len))
+    } else {
+        None
+    }
+}
+
+fn dot_numeric_or_wild(s: &[u8]) -> Option<(Option<u64>, usize)> {
+    b'.'.p(s).and_then(|len|
+        numeric_or_wild(&s[len..]).map(|(val, len2)| (val, len + len2))
+    )
+}
+
+fn operation(s: &[u8]) -> Option<(Op, usize)> {
+    if let Some(len) = "=".p(s) {
+        Some((Op::Ex, len))
+    } else if let Some(len) = ">=".p(s) {
+        Some((Op::GtEq, len))
+    } else if let Some(len) = ">".p(s) {
+        Some((Op::Gt, len))
+    } else if let Some(len) = "<=".p(s) {
+        Some((Op::LtEq, len))
+    } else if let Some(len) = "<".p(s) {
+        Some((Op::Lt, len))
+    } else if let Some(len) = "~".p(s) {
+        Some((Op::Tilde, len))
+    } else if let Some(len) = "^".p(s) {
+        Some((Op::Compatible, len))
+    } else {
+        None
+    }
+}
+
+fn whitespace(s: &[u8]) -> Option<usize> {
+    ZeroOrMore(OneOf(b"\t\r\n ")).p(s)
+}
+
+pub fn parse_predicate(range: &str) -> Result<Predicate, String> {
+    let s = range.trim().as_bytes();
+    let mut i = 0;
+    let mut operation = if let Some((op, len)) = operation(&s[i..]) {
+        i += len;
+        op
+    } else {
+        // operations default to Compatible
+        Op::Compatible
+    };
+    if let Some(len) = whitespace.p(&s[i..]) {
+        i += len;
+    }
+    let major = if let Some((major, len)) = numeric_identifier(&s[i..]) {
+        i += len;
+        major
+    } else {
+        return Err("Error parsing major version number: ".to_string());
+    };
+    let minor = if let Some((minor, len)) = dot_numeric_or_wild(&s[i..]) {
+        i += len;
+        if minor.is_none() {
+            operation = Op::Wildcard(WildcardVersion::Minor);
+        }
+        minor
+    } else {
+        None
+    };
+    let patch = if let Some((patch, len)) = dot_numeric_or_wild(&s[i..]) {
+        i += len;
+        if patch.is_none() {
+            operation = Op::Wildcard(WildcardVersion::Patch);
+        }
+        patch
+    } else {
+        None
+    };
+    let (pre, pre_len) = common::parse_optional_meta(&s[i..], b'-')?;
+    i += pre_len;
+    if let Some(len) = (b'+', letters_numbers_dash_dot).p(&s[i..]) {
+        i += len;
+    }
+    if i != s.len() {
+        return Err("Extra junk after valid predicate: ".to_string() +
+            from_utf8(&s[i..]).unwrap());
+    }
+    Ok(Predicate {
+        op: operation,
+        major: major,
+        minor: minor,
+        patch: patch,
+        pre: pre,
+    })
+}
+
+pub fn parse(ranges: &str) -> Result<VersionReq, String> {
+    // null is an error
+    if ranges == "\0" {
+        return Err(String::from("Null is not a valid VersionReq"));
+    }
+
+    // an empty range is a major version wildcard
+    // so is a lone * or x of either capitalization
+    if (ranges == "")
+    || (ranges == "*")
+    || (ranges == "x")
+    || (ranges == "X") {
+        return Ok(VersionReq {
+            predicates: vec![Predicate {
+                op: Op::Wildcard(WildcardVersion::Major),
+                major: 0,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            }],
+        });
+    }
+
+
+    let ranges = ranges.trim();
+
+    let predicates: Result<Vec<_>, String> = ranges
+        .split(",")
+        .map(|range| {
+            parse_predicate(range)
+        })
+        .collect();
+
+    let predicates = try!(predicates);
+
+    if predicates.len() == 0 {
+        return Err(String::from("VersionReq did not parse properly"));
+    }
+
+    Ok(VersionReq {
+        predicates: predicates,
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use range;
+    use version::Identifier;
+
+    #[test]
+    fn test_parsing_default() {
+        let r = range::parse("1.0.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 1,
+                minor: Some(0),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_exact_01() {
+        let r = range::parse("=1.0.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Ex,
+                major: 1,
+                minor: Some(0),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_exact_02() {
+        let r = range::parse("=0.9.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Ex,
+                major: 0,
+                minor: Some(9),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_exact_03() {
+        let r = range::parse("=0.1.0-beta2.a").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Ex,
+                major: 0,
+                minor: Some(1),
+                patch: Some(0),
+                pre: vec![Identifier::AlphaNumeric(String::from("beta2")),
+                          Identifier::AlphaNumeric(String::from("a"))],
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_greater_than() {
+        let r = range::parse("> 1.0.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Gt,
+                major: 1,
+                minor: Some(0),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_greater_than_01() {
+        let r = range::parse(">= 1.0.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::GtEq,
+                major: 1,
+                minor: Some(0),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_greater_than_02() {
+        let r = range::parse(">= 2.1.0-alpha2").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::GtEq,
+                major: 2,
+                minor: Some(1),
+                patch: Some(0),
+                pre: vec![Identifier::AlphaNumeric(String::from("alpha2"))],
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_less_than() {
+        let r = range::parse("< 1.0.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Lt,
+                major: 1,
+                minor: Some(0),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_less_than_eq() {
+        let r = range::parse("<= 2.1.0-alpha2").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::LtEq,
+                major: 2,
+                minor: Some(1),
+                patch: Some(0),
+                pre: vec![Identifier::AlphaNumeric(String::from("alpha2"))],
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_tilde() {
+        let r = range::parse("~1").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Tilde,
+                major: 1,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_parsing_compatible() {
+        let r = range::parse("^0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 0,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_blank() {
+        let r = range::parse("").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Major),
+                major: 0,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_wildcard() {
+        let r = range::parse("*").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Major),
+                major: 0,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_x() {
+        let r = range::parse("x").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Major),
+                major: 0,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_capital_x() {
+        let r = range::parse("X").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Major),
+                major: 0,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_minor_wildcard_star() {
+        let r = range::parse("1.*").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Minor),
+                major: 1,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_minor_wildcard_x() {
+        let r = range::parse("1.x").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Minor),
+                major: 1,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_minor_wildcard_capital_x() {
+        let r = range::parse("1.X").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Minor),
+                major: 1,
+                minor: None,
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_patch_wildcard_star() {
+        let r = range::parse("1.2.*").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Patch),
+                major: 1,
+                minor: Some(2),
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_patch_wildcard_x() {
+        let r = range::parse("1.2.x").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Patch),
+                major: 1,
+                minor: Some(2),
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    fn test_parsing_patch_wildcard_capital_x() {
+        let r = range::parse("1.2.X").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Wildcard(WildcardVersion::Patch),
+                major: 1,
+                minor: Some(2),
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+    }
+
+    #[test]
+    pub fn test_multiple_01() {
+        let r = range::parse("> 0.0.9, <= 2.5.3").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Gt,
+                major: 0,
+                minor: Some(0),
+                patch: Some(9),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+
+        assert_eq!(Predicate {
+                op: Op::LtEq,
+                major: 2,
+                minor: Some(5),
+                patch: Some(3),
+                pre: Vec::new(),
+            },
+            r.predicates[1]
+        );
+    }
+
+    #[test]
+    pub fn test_multiple_02() {
+        let r = range::parse("0.3.0, 0.4.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 0,
+                minor: Some(3),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 0,
+                minor: Some(4),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[1]
+        );
+    }
+
+    #[test]
+    pub fn test_multiple_03() {
+        let r = range::parse("<= 0.2.0, >= 0.5.0").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::LtEq,
+                major: 0,
+                minor: Some(2),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+
+        assert_eq!(Predicate {
+                op: Op::GtEq,
+                major: 0,
+                minor: Some(5),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[1]
+        );
+    }
+
+    #[test]
+    pub fn test_multiple_04() {
+        let r = range::parse("0.1.0, 0.1.4, 0.1.6").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 0,
+                minor: Some(1),
+                patch: Some(0),
+                pre: Vec::new(),
+            },
+            r.predicates[0]
+        );
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 0,
+                minor: Some(1),
+                patch: Some(4),
+                pre: Vec::new(),
+            },
+            r.predicates[1]
+        );
+
+        assert_eq!(Predicate {
+                op: Op::Compatible,
+                major: 0,
+                minor: Some(1),
+                patch: Some(6),
+                pre: Vec::new(),
+            },
+            r.predicates[2]
+        );
+    }
+
+    #[test]
+    pub fn test_multiple_05() {
+        let r = range::parse(">=0.5.1-alpha3, <0.6").unwrap();
+
+        assert_eq!(Predicate {
+                op: Op::GtEq,
+                major: 0,
+                minor: Some(5),
+                patch: Some(1),
+                pre: vec![Identifier::AlphaNumeric(String::from("alpha3"))],
+            },
+            r.predicates[0]
+        );
+
+        assert_eq!(Predicate {
+                op: Op::Lt,
+                major: 0,
+                minor: Some(6),
+                patch: None,
+                pre: Vec::new(),
+            },
+            r.predicates[1]
+        );
+    }
+
+    #[test]
+    fn test_parse_build_metadata_with_predicate() {
+        assert_eq!(range::parse("^1.2.3+meta").unwrap().predicates[0].op,
+                   Op::Compatible);
+        assert_eq!(range::parse("~1.2.3+meta").unwrap().predicates[0].op,
+                   Op::Tilde);
+        assert_eq!(range::parse("=1.2.3+meta").unwrap().predicates[0].op,
+                   Op::Ex);
+        assert_eq!(range::parse("<=1.2.3+meta").unwrap().predicates[0].op,
+                   Op::LtEq);
+        assert_eq!(range::parse(">=1.2.3+meta").unwrap().predicates[0].op,
+                   Op::GtEq);
+        assert_eq!(range::parse("<1.2.3+meta").unwrap().predicates[0].op,
+                   Op::Lt);
+        assert_eq!(range::parse(">1.2.3+meta").unwrap().predicates[0].op,
+                   Op::Gt);
+    }
+
+    #[test]
+    pub fn test_parse_errors() {
+        assert!(range::parse("\0").is_err());
+        assert!(range::parse(">= >= 0.0.2").is_err());
+        assert!(range::parse(">== 0.0.2").is_err());
+        assert!(range::parse("a.0.0").is_err());
+        assert!(range::parse("1.0.0-").is_err());
+        assert!(range::parse(">=").is_err());
+        assert!(range::parse("> 0.1.0,").is_err());
+        assert!(range::parse("> 0.3.0, ,").is_err());
+    }
+
+    #[test]
+    pub fn test_large_major_version() {
+        assert!(range::parse("18446744073709551617.0.0").is_err());
+    }
+
+    #[test]
+    pub fn test_large_minor_version() {
+        assert!(range::parse("0.18446744073709551617.0").is_err());
+    }
+
+    #[test]
+    pub fn test_large_patch_version() {
+        assert!(range::parse("0.0.18446744073709551617").is_err());
+    }
+}

third-party/vendor/semver-parser/src/recognize.rs

@@ -0,0 +1,154 @@
+// Copyright 2017 Google Inc. All rights reserved.
+//
+// Licensed under either of MIT or Apache License, Version 2.0,
+// at your option.
+//
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Simple recognizer combinators.
+
+// This version is similar to a similar one in the "lang" module of
+// xi-editor, but is stripped down to only the needed combinators.
+
+use std::ops;
+
+pub trait Recognize {
+    fn p(&self, s: &[u8]) -> Option<usize>;
+}
+
+impl<F: Fn(&[u8]) -> Option<usize>> Recognize for F {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        self(s)
+    }
+}
+
+pub struct OneByte<F>(pub F);
+
+impl<F: Fn(u8) -> bool> Recognize for OneByte<F> {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        if s.is_empty() || !self.0(s[0]) {
+            None
+        } else {
+            Some(1)
+        }
+    }
+}
+
+impl Recognize for u8 {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        OneByte(|b| b == *self).p(s)
+    }
+}
+
+/// Use Inclusive(a..b) to indicate an inclusive range. When a...b syntax becomes
+/// stable, we can get rid of this and switch to that.
+pub struct Inclusive<T>(pub T);
+
+impl Recognize for Inclusive<ops::Range<u8>> {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        OneByte(|x| x >= self.0.start && x <= self.0.end).p(s)
+    }
+}
+
+impl<'a> Recognize for &'a [u8] {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        let len = self.len();
+        if s.len() >= len && &s[..len] == *self {
+            Some(len)
+        } else {
+            None
+        }
+    }
+}
+
+impl<'a> Recognize for &'a str {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        self.as_bytes().p(s)
+    }
+}
+
+impl<P1: Recognize, P2: Recognize> Recognize for (P1, P2) {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        self.0.p(s).and_then(|len1|
+            self.1.p(&s[len1..]).map(|len2|
+                len1 + len2))
+    }
+}
+
+/// Choice from two heterogeneous alternatives.
+pub struct Alt<P1, P2>(pub P1, pub P2);
+
+impl<P1: Recognize, P2: Recognize> Recognize for Alt<P1, P2> {
+    #[inline(always)]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        self.0.p(s).or_else(|| self.1.p(s))
+    }
+}
+
+/// Choice from a homogenous slice of parsers.
+pub struct OneOf<'a, P: 'a>(pub &'a [P]);
+
+impl<'a, P: Recognize> Recognize for OneOf<'a, P> {
+    #[inline]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        for ref p in self.0 {
+            if let Some(len) = p.p(s) {
+                return Some(len);
+            }
+        }
+        None
+    }
+}
+
+pub struct OneOrMore<P>(pub P);
+
+impl<P: Recognize> Recognize for OneOrMore<P> {
+    #[inline]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        let mut i = 0;
+        let mut count = 0;
+        while let Some(len) = self.0.p(&s[i..]) {
+            i += len;
+            count += 1;
+        }
+        if count >= 1 {
+            Some(i)
+        } else {
+            None
+        }
+    }
+}
+
+pub struct ZeroOrMore<P>(pub P);
+
+impl<P: Recognize> Recognize for ZeroOrMore<P> {
+    #[inline]
+    fn p(&self, s: &[u8]) -> Option<usize> {
+        let mut i = 0;
+        while let Some(len) = self.0.p(&s[i..]) {
+            i += len;
+        }
+        Some(i)
+    }
+}

third-party/vendor/semver-parser/src/version.rs

@@ -0,0 +1,365 @@
+use std::fmt;
+use std::str::from_utf8;
+
+use recognize::*;
+
+use common::{self, numeric_identifier};
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Version {
+    pub major: u64,
+    pub minor: u64,
+    pub patch: u64,
+    pub pre: Vec<Identifier>,
+    pub build: Vec<Identifier>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum Identifier {
+    /// An identifier that's solely numbers.
+    Numeric(u64),
+    /// An identifier with letters and numbers.
+    AlphaNumeric(String),
+}
+
+pub fn parse(version: &str) -> Result<Version, String> {
+    let s = version.trim().as_bytes();
+    let mut i = 0;
+    let major = if let Some((major, len)) = numeric_identifier(&s[i..]) {
+        i += len;
+        major
+    } else {
+        return Err("Error parsing major identifier".to_string());
+    };
+    if let Some(len) = b'.'.p(&s[i..]) {
+        i += len;
+    } else {
+        return Err("Expected dot".to_string());
+    }
+    let minor = if let Some((minor, len)) = numeric_identifier(&s[i..]) {
+        i += len;
+        minor
+    } else {
+        return Err("Error parsing minor identifier".to_string());
+    };
+    if let Some(len) = b'.'.p(&s[i..]) {
+        i += len;
+    } else {
+        return Err("Expected dot".to_string());
+    }
+    let patch = if let Some((patch, len)) = numeric_identifier(&s[i..]) {
+        i += len;
+        patch
+    } else {
+        return Err("Error parsing patch identifier".to_string());
+    };
+    let (pre, pre_len) = common::parse_optional_meta(&s[i..], b'-')?;
+    i += pre_len;
+    let (build, build_len) = common::parse_optional_meta(&s[i..], b'+')?;
+    i += build_len;
+    if i != s.len() {
+        return Err("Extra junk after valid version: ".to_string() +
+            from_utf8(&s[i..]).unwrap());
+    }
+    Ok(Version {
+        major: major,
+        minor: minor,
+        patch: patch,
+        pre: pre,
+        build: build,
+    })
+}
+
+impl fmt::Display for Version {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        try!(write!(f, "{}.{}.{}", self.major, self.minor, self.patch));
+        if !self.pre.is_empty() {
+            let strs: Vec<_> =
+                self.pre.iter().map(ToString::to_string).collect();
+            try!(write!(f, "-{}", strs.join(".")));
+        }
+        if !self.build.is_empty() {
+            let strs: Vec<_> =
+                self.build.iter().map(ToString::to_string).collect();
+            try!(write!(f, "+{}", strs.join(".")));
+        }
+        Ok(())
+    }
+}
+
+impl fmt::Display for Identifier {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Identifier::Numeric(ref id) => id.fmt(f),
+            Identifier::AlphaNumeric(ref id) => id.fmt(f),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use version;
+    use super::*;
+
+    #[test]
+    fn parse_empty() {
+        let version = "";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "empty string incorrectly considered a valid parse");
+    }
+
+    #[test]
+    fn parse_blank() {
+        let version = "  ";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "blank string incorrectly considered a valid parse");
+    }
+
+    #[test]
+    fn parse_no_minor_patch() {
+        let version = "1";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), format!("'{}' incorrectly considered a valid parse", version));
+    }
+
+    #[test]
+    fn parse_no_patch() {
+        let version = "1.2";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), format!("'{}' incorrectly considered a valid parse", version));
+    }
+
+    #[test]
+    fn parse_empty_pre() {
+        let version = "1.2.3-";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), format!("'{}' incorrectly considered a valid parse", version));
+    }
+
+    #[test]
+    fn parse_letters() {
+        let version = "a.b.c";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), format!("'{}' incorrectly considered a valid parse", version));
+    }
+
+    #[test]
+    fn parse_with_letters() {
+        let version = "1.2.3 a.b.c";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), format!("'{}' incorrectly considered a valid parse", version));
+    }
+
+    #[test]
+    fn parse_basic_version() {
+        let version = "1.2.3";
+
+        let parsed = version::parse(version).unwrap();
+
+        assert_eq!(1, parsed.major);
+        assert_eq!(2, parsed.minor);
+        assert_eq!(3, parsed.patch);
+    }
+
+    #[test]
+    fn parse_trims_input() {
+        let version = "  1.2.3  ";
+
+        let parsed = version::parse(version).unwrap();
+
+        assert_eq!(1, parsed.major);
+        assert_eq!(2, parsed.minor);
+        assert_eq!(3, parsed.patch);
+    }
+
+    #[test]
+    fn parse_no_major_leading_zeroes() {
+        let version = "01.0.0";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "01 incorrectly considered a valid major version");
+    }
+
+    #[test]
+    fn parse_no_minor_leading_zeroes() {
+        let version = "0.01.0";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "01 incorrectly considered a valid minor version");
+    }
+
+    #[test]
+    fn parse_no_patch_leading_zeroes() {
+        let version = "0.0.01";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "01 incorrectly considered a valid patch version");
+    }
+
+    #[test]
+    fn parse_no_major_overflow() {
+        let version = "98765432109876543210.0.0";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "98765432109876543210 incorrectly considered a valid major version");
+    }
+
+    #[test]
+    fn parse_no_minor_overflow() {
+        let version = "0.98765432109876543210.0";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "98765432109876543210 incorrectly considered a valid minor version");
+    }
+
+    #[test]
+    fn parse_no_patch_overflow() {
+        let version = "0.0.98765432109876543210";
+
+        let parsed = version::parse(version);
+
+        assert!(parsed.is_err(), "98765432109876543210 incorrectly considered a valid patch version");
+    }
+
+    #[test]
+    fn parse_basic_prerelease() {
+        let version = "1.2.3-pre";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("pre"))];
+        assert_eq!(expected_pre, parsed.pre);
+    }
+
+    #[test]
+    fn parse_prerelease_alphanumeric() {
+        let version = "1.2.3-alpha1";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("alpha1"))];
+        assert_eq!(expected_pre, parsed.pre);
+    }
+
+    #[test]
+    fn parse_prerelease_zero() {
+        let version = "1.2.3-pre.0";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("pre")),
+                                Identifier::Numeric(0)];
+        assert_eq!(expected_pre, parsed.pre);
+    }
+
+    #[test]
+    fn parse_basic_build() {
+        let version = "1.2.3+build";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_build = vec![Identifier::AlphaNumeric(String::from("build"))];
+        assert_eq!(expected_build, parsed.build);
+    }
+
+    #[test]
+    fn parse_build_alphanumeric() {
+        let version = "1.2.3+build5";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_build = vec![Identifier::AlphaNumeric(String::from("build5"))];
+        assert_eq!(expected_build, parsed.build);
+    }
+
+    #[test]
+    fn parse_pre_and_build() {
+        let version = "1.2.3-alpha1+build5";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("alpha1"))];
+        assert_eq!(expected_pre, parsed.pre);
+
+        let expected_build = vec![Identifier::AlphaNumeric(String::from("build5"))];
+        assert_eq!(expected_build, parsed.build);
+    }
+
+    #[test]
+    fn parse_complex_metadata_01() {
+        let version = "1.2.3-1.alpha1.9+build5.7.3aedf  ";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::Numeric(1),
+                                Identifier::AlphaNumeric(String::from("alpha1")),
+                                Identifier::Numeric(9)];
+        assert_eq!(expected_pre, parsed.pre);
+
+        let expected_build = vec![Identifier::AlphaNumeric(String::from("build5")),
+                                  Identifier::Numeric(7),
+                                  Identifier::AlphaNumeric(String::from("3aedf"))];
+        assert_eq!(expected_build, parsed.build);
+    }
+
+    #[test]
+    fn parse_complex_metadata_02() {
+        let version = "0.4.0-beta.1+0851523";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("beta")),
+                                Identifier::Numeric(1)];
+        assert_eq!(expected_pre, parsed.pre);
+
+        let expected_build = vec![Identifier::AlphaNumeric(String::from("0851523"))];
+        assert_eq!(expected_build, parsed.build);
+    }
+
+    #[test]
+    fn parse_metadata_overflow() {
+        let version = "0.4.0-beta.1+98765432109876543210";
+
+        let parsed = version::parse(version).unwrap();
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("beta")),
+                                Identifier::Numeric(1)];
+        assert_eq!(expected_pre, parsed.pre);
+
+        let expected_build = vec![Identifier::AlphaNumeric(String::from("98765432109876543210"))];
+        assert_eq!(expected_build, parsed.build);
+    }
+
+    #[test]
+    fn parse_regression_01() {
+        let version = "0.0.0-WIP";
+
+        let parsed = version::parse(version).unwrap();
+
+        assert_eq!(0, parsed.major);
+        assert_eq!(0, parsed.minor);
+        assert_eq!(0, parsed.patch);
+
+        let expected_pre = vec![Identifier::AlphaNumeric(String::from("WIP"))];
+        assert_eq!(expected_pre, parsed.pre);
+    }
+}