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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/// A version is either an exact revision,
/// or a semantic version
extern mod std;
use extra::semver;
use std::{char, os, result, run, str};
use package_path::RemotePath;
use extra::tempfile::mkdtemp;
#[deriving(Eq)]
pub enum Version {
ExactRevision(~str), // Should look like a m.n.(...).x
SemanticVersion(semver::Version),
NoVersion // user didn't specify a version -- prints as 0.1
}
impl Ord for Version {
fn lt(&self, other: &Version) -> bool {
match (self, other) {
(&NoVersion, _) => true,
(&ExactRevision(ref f1), &ExactRevision(ref f2)) => f1 < f2,
(&SemanticVersion(ref v1), &SemanticVersion(ref v2)) => v1 < v2,
_ => false // incomparable, really
}
}
fn le(&self, other: &Version) -> bool {
match (self, other) {
(&NoVersion, _) => true,
(&ExactRevision(ref f1), &ExactRevision(ref f2)) => f1 <= f2,
(&SemanticVersion(ref v1), &SemanticVersion(ref v2)) => v1 <= v2,
_ => false // incomparable, really
}
}
fn ge(&self, other: &Version) -> bool {
match (self, other) {
(&ExactRevision(ref f1), &ExactRevision(ref f2)) => f1 > f2,
(&SemanticVersion(ref v1), &SemanticVersion(ref v2)) => v1 > v2,
_ => false // incomparable, really
}
}
fn gt(&self, other: &Version) -> bool {
match (self, other) {
(&ExactRevision(ref f1), &ExactRevision(ref f2)) => f1 >= f2,
(&SemanticVersion(ref v1), &SemanticVersion(ref v2)) => v1 >= v2,
_ => false // incomparable, really
}
}
}
impl ToStr for Version {
fn to_str(&self) -> ~str {
match *self {
ExactRevision(ref n) => fmt!("%s", n.to_str()),
SemanticVersion(ref v) => fmt!("%s", v.to_str()),
NoVersion => ~"0.1"
}
}
}
pub fn parse_vers(vers: ~str) -> result::Result<semver::Version, ~str> {
match semver::parse(vers) {
Some(vers) => result::Ok(vers),
None => result::Err(~"could not parse version: invalid")
}
}
/// If `remote_path` refers to a git repo that can be downloaded,
/// and the most recent tag in that repo denotes a version, return it;
/// otherwise, `None`
pub fn try_getting_version(remote_path: &RemotePath) -> Option<Version> {
debug!("try_getting_version: %s", remote_path.to_str());
if is_url_like(remote_path) {
debug!("Trying to fetch its sources..");
let tmp_dir = mkdtemp(&os::tmpdir(),
"test").expect("try_getting_version: couldn't create temp dir");
debug!("(to get version) executing {git clone https://%s %s}",
remote_path.to_str(),
tmp_dir.to_str());
let outp = run::process_output("git", [~"clone", fmt!("https://%s", remote_path.to_str()),
tmp_dir.to_str()]);
if outp.status == 0 {
debug!("Cloned it... ( %s, %s )",
str::from_bytes(outp.output),
str::from_bytes(outp.error));
let mut output = None;
debug!("(getting version, now getting tags) executing {git --git-dir=%s tag -l}",
tmp_dir.push(".git").to_str());
let outp = run::process_output("git",
[fmt!("--git-dir=%s", tmp_dir.push(".git").to_str()),
~"tag", ~"-l"]);
let output_text = str::from_bytes(outp.output);
debug!("Full output: ( %s ) [%?]", output_text, outp.status);
for output_text.line_iter().advance |l| {
debug!("A line of output: %s", l);
if !l.is_whitespace() {
output = Some(l);
}
}
output.chain(try_parsing_version)
}
else {
None
}
}
else {
None
}
}
// Being lazy since we don't have a regexp library now
#[deriving(Eq)]
enum ParseState {
Start,
SawDigit,
SawDot
}
fn try_parsing_version(s: &str) -> Option<Version> {
let s = s.trim();
debug!("Attempting to parse: %s", s);
let mut parse_state = Start;
for s.iter().advance |c| {
if char::is_digit(c) {
parse_state = SawDigit;
}
else if c == '.' && parse_state == SawDigit {
parse_state = SawDot;
}
else {
return None;
}
}
match parse_state {
SawDigit => Some(ExactRevision(s.to_owned())),
_ => None
}
}
/// Just an approximation
fn is_url_like(p: &RemotePath) -> bool {
let str = p.to_str();
str.split_iter('/').len_() > 2
}
/// If s is of the form foo#bar, where bar is a valid version
/// number, return the prefix before the # and the version.
/// Otherwise, return None.
pub fn split_version<'a>(s: &'a str) -> Option<(&'a str, Version)> {
split_version_general(s, '#')
}
pub fn split_version_general<'a>(s: &'a str, sep: char) -> Option<(&'a str, Version)> {
// reject strings with multiple '#'s
for s.split_iter(sep).advance |st| {
debug!("whole = %s part = %s", s, st);
}
if s.split_iter(sep).len_() > 2 {
return None;
}
match s.rfind(sep) {
Some(i) => {
debug!("in %s, i = %?", s, i);
let path = s.slice(0, i);
debug!("path = %s", path);
// n.b. for now, assuming an exact revision is intended, not a SemVer
Some((path, ExactRevision(s.slice(i + 1, s.len()).to_owned())))
}
None => {
debug!("%s doesn't look like an explicit-version thing", s);
None
}
}
}
#[test]
fn test_parse_version() {
assert!(try_parsing_version("1.2") == Some(ExactRevision(~"1.2")));
assert!(try_parsing_version("1.0.17") == Some(ExactRevision(~"1.0.17")));
assert!(try_parsing_version("you're_a_kitty") == None);
assert!(try_parsing_version("42..1") == None);
assert!(try_parsing_version("17") == Some(ExactRevision(~"17")));
assert!(try_parsing_version(".1.2.3") == None);
assert!(try_parsing_version("2.3.") == None);
}
#[test]
fn test_split_version() {
let s = "a/b/c#0.1";
debug!("== %? ==", split_version(s));
assert!(split_version(s) == Some((s.slice(0, 5), ExactRevision(~"0.1"))));
assert!(split_version("a/b/c") == None);
let s = "a#1.2";
assert!(split_version(s) == Some((s.slice(0, 1), ExactRevision(~"1.2"))));
assert!(split_version("a#a#3.4") == None);
}
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