summaryrefslogtreecommitdiffstats
path: root/testing/mozbase/rust/mozversion/src/lib.rs
blob: 225b290d101a8ed007bb02c2d9b2ebe58d9b25ae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
#![forbid(unsafe_code)]
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

extern crate ini;
extern crate regex;
extern crate semver;

use crate::platform::ini_path;
use ini::Ini;
use regex::Regex;
use std::default::Default;
use std::fmt::{self, Display, Formatter};
use std::path::Path;
use std::process::{Command, Stdio};
use std::str::{self, FromStr};
use thiserror::Error;

/// Details about the version of a Firefox build.
#[derive(Clone, Default)]
pub struct AppVersion {
    /// Unique date-based id for a build
    pub build_id: Option<String>,
    /// Channel name
    pub code_name: Option<String>,
    /// Version number e.g. 55.0a1
    pub version_string: Option<String>,
    /// Url of the respoistory from which the build was made
    pub source_repository: Option<String>,
    /// Commit ID of the build
    pub source_stamp: Option<String>,
}

impl AppVersion {
    pub fn new() -> AppVersion {
        Default::default()
    }

    fn update_from_application_ini(&mut self, ini_file: &Ini) {
        if let Some(section) = ini_file.section(Some("App")) {
            if let Some(build_id) = section.get("BuildID") {
                self.build_id = Some(build_id.clone());
            }
            if let Some(code_name) = section.get("CodeName") {
                self.code_name = Some(code_name.clone());
            }
            if let Some(version) = section.get("Version") {
                self.version_string = Some(version.clone());
            }
            if let Some(source_repository) = section.get("SourceRepository") {
                self.source_repository = Some(source_repository.clone());
            }
            if let Some(source_stamp) = section.get("SourceStamp") {
                self.source_stamp = Some(source_stamp.clone());
            }
        }
    }

    fn update_from_platform_ini(&mut self, ini_file: &Ini) {
        if let Some(section) = ini_file.section(Some("Build")) {
            if let Some(build_id) = section.get("BuildID") {
                self.build_id = Some(build_id.clone());
            }
            if let Some(version) = section.get("Milestone") {
                self.version_string = Some(version.clone());
            }
            if let Some(source_repository) = section.get("SourceRepository") {
                self.source_repository = Some(source_repository.clone());
            }
            if let Some(source_stamp) = section.get("SourceStamp") {
                self.source_stamp = Some(source_stamp.clone());
            }
        }
    }

    pub fn version(&self) -> Option<Version> {
        self.version_string
            .as_ref()
            .and_then(|x| Version::from_str(x).ok())
    }
}

#[derive(Default, Clone)]
/// Version number information
pub struct Version {
    /// Major version number (e.g. 55 in 55.0)
    pub major: u64,
    /// Minor version number (e.g. 1 in 55.1)
    pub minor: u64,
    /// Patch version number (e.g. 2 in 55.1.2)
    pub patch: u64,
    /// Prerelase information (e.g. Some(("a", 1)) in 55.0a1)
    pub pre: Option<(String, u64)>,
    /// Is build an ESR build
    pub esr: bool,
}

impl Version {
    fn to_semver(&self) -> semver::Version {
        // The way the semver crate handles prereleases isn't what we want here
        // This should be fixed in the long term by implementing our own comparison
        // operators, but for now just act as if prerelease metadata was missing,
        // otherwise it is almost impossible to use this with nightly
        semver::Version {
            major: self.major,
            minor: self.minor,
            patch: self.patch,
            pre: semver::Prerelease::EMPTY,
            build: semver::BuildMetadata::EMPTY,
        }
    }

    pub fn matches(&self, version_req: &str) -> VersionResult<bool> {
        let req = semver::VersionReq::parse(version_req)?;
        Ok(req.matches(&self.to_semver()))
    }
}

impl FromStr for Version {
    type Err = Error;

    fn from_str(version_string: &str) -> VersionResult<Version> {
        let mut version: Version = Default::default();
        let version_re = Regex::new(r"^(?P<major>[[:digit:]]+)\.(?P<minor>[[:digit:]]+)(?:\.(?P<patch>[[:digit:]]+))?(?:(?P<esr>esr)|(?P<pre0>\-|[a-z]+)(?P<pre1>[[:digit:]]*))?$").unwrap();
        if let Some(captures) = version_re.captures(version_string) {
            match captures
                .name("major")
                .and_then(|x| u64::from_str(x.as_str()).ok())
            {
                Some(x) => version.major = x,
                None => return Err(Error::VersionError("No major version number found".into())),
            }
            match captures
                .name("minor")
                .and_then(|x| u64::from_str(x.as_str()).ok())
            {
                Some(x) => version.minor = x,
                None => return Err(Error::VersionError("No minor version number found".into())),
            }
            if let Some(x) = captures
                .name("patch")
                .and_then(|x| u64::from_str(x.as_str()).ok())
            {
                version.patch = x
            }
            if captures.name("esr").is_some() {
                version.esr = true;
            }
            if let Some(pre_0) = captures.name("pre0").map(|x| x.as_str().to_string()) {
                if captures.name("pre1").is_some() {
                    if let Some(pre_1) = captures
                        .name("pre1")
                        .and_then(|x| u64::from_str(x.as_str()).ok())
                    {
                        version.pre = Some((pre_0, pre_1))
                    } else {
                        return Err(Error::VersionError(
                            "Failed to convert prelease number to u64".into(),
                        ));
                    }
                } else {
                    return Err(Error::VersionError(
                        "Failed to convert prelease number to u64".into(),
                    ));
                }
            }
        } else {
            return Err(Error::VersionError(format!(
                "Failed to parse {} as version string",
                version_string
            )));
        }
        Ok(version)
    }
}

impl Display for Version {
    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
        match self.patch {
            0 => write!(f, "{}.{}", self.major, self.minor)?,
            _ => write!(f, "{}.{}.{}", self.major, self.minor, self.patch)?,
        }
        if self.esr {
            write!(f, "esr")?;
        }
        if let Some(ref pre) = self.pre {
            write!(f, "{}{}", pre.0, pre.1)?;
        };
        Ok(())
    }
}

/// Determine the version of Firefox using associated metadata files.
///
/// Given the path to a Firefox binary, read the associated application.ini
/// and platform.ini files to extract information about the version of Firefox
/// at that path.
pub fn firefox_version(binary: &Path) -> VersionResult<AppVersion> {
    let mut version = AppVersion::new();
    let mut updated = false;

    if let Some(dir) = ini_path(binary) {
        let mut application_ini = dir.clone();
        application_ini.push("application.ini");

        if Path::exists(&application_ini) {
            let ini_file = Ini::load_from_file(application_ini).ok();
            if let Some(ini) = ini_file {
                updated = true;
                version.update_from_application_ini(&ini);
            }
        }

        let mut platform_ini = dir;
        platform_ini.push("platform.ini");

        if Path::exists(&platform_ini) {
            let ini_file = Ini::load_from_file(platform_ini).ok();
            if let Some(ini) = ini_file {
                updated = true;
                version.update_from_platform_ini(&ini);
            }
        }

        if !updated {
            return Err(Error::MetadataError(
                "Neither platform.ini nor application.ini found".into(),
            ));
        }
    } else {
        return Err(Error::MetadataError("Invalid binary path".into()));
    }
    Ok(version)
}

/// Determine the version of Firefox by executing the binary.
///
/// Given the path to a Firefox binary, run firefox --version and extract the
/// version string from the output
pub fn firefox_binary_version(binary: &Path) -> VersionResult<Version> {
    let output = Command::new(binary)
        .args(["--version"])
        .stdout(Stdio::piped())
        .spawn()
        .and_then(|child| child.wait_with_output())
        .ok();

    if let Some(x) = output {
        let output_str = str::from_utf8(&x.stdout)
            .map_err(|_| Error::VersionError("Couldn't parse version output as UTF8".into()))?;
        parse_binary_version(output_str)
    } else {
        Err(Error::VersionError("Running binary failed".into()))
    }
}

fn parse_binary_version(version_str: &str) -> VersionResult<Version> {
    let version_regexp =
        Regex::new(r#"Firefox[[:space:]]+(?P<version>.+)"#).expect("Error parsing version regexp");

    let version_match = version_regexp
        .captures(version_str)
        .and_then(|captures| captures.name("version"))
        .ok_or_else(|| Error::VersionError("--version output didn't match expectations".into()))?;

    Version::from_str(version_match.as_str())
}

#[derive(Clone, Debug, Error)]
pub enum Error {
    /// Error parsing a version string
    #[error("VersionError: {0}")]
    VersionError(String),
    /// Error reading application metadata
    #[error("MetadataError: {0}")]
    MetadataError(String),
    /// Error processing a string as a semver comparator
    #[error("SemVerError: {0}")]
    SemVerError(String),
}

impl From<semver::Error> for Error {
    fn from(err: semver::Error) -> Error {
        Error::SemVerError(err.to_string())
    }
}

pub type VersionResult<T> = Result<T, Error>;

#[cfg(target_os = "macos")]
mod platform {
    use std::path::{Path, PathBuf};

    pub fn ini_path(binary: &Path) -> Option<PathBuf> {
        binary
            .canonicalize()
            .ok()
            .as_ref()
            .and_then(|dir| dir.parent())
            .and_then(|dir| dir.parent())
            .map(|dir| dir.join("Resources"))
    }
}

#[cfg(not(target_os = "macos"))]
mod platform {
    use std::path::{Path, PathBuf};

    pub fn ini_path(binary: &Path) -> Option<PathBuf> {
        binary
            .canonicalize()
            .ok()
            .as_ref()
            .and_then(|dir| dir.parent())
            .map(|dir| dir.to_path_buf())
    }
}

#[cfg(test)]
mod test {
    use super::{parse_binary_version, Version};
    use std::str::FromStr;

    fn parse_version(input: &str) -> String {
        Version::from_str(input).unwrap().to_string()
    }

    fn compare(version: &str, comparison: &str) -> bool {
        let v = Version::from_str(version).unwrap();
        v.matches(comparison).unwrap()
    }

    #[test]
    fn test_parser() {
        assert!(parse_version("50.0a1") == "50.0a1");
        assert!(parse_version("50.0.1a1") == "50.0.1a1");
        assert!(parse_version("50.0.0") == "50.0");
        assert!(parse_version("78.0.11esr") == "78.0.11esr");
    }

    #[test]
    fn test_matches() {
        assert!(compare("50.0", "=50"));
        assert!(compare("50.1", "=50"));
        assert!(compare("50.1", "=50.1"));
        assert!(compare("50.1.1", "=50.1"));
        assert!(compare("50.0.0", "=50.0.0"));
        assert!(compare("51.0.0", ">50"));
        assert!(compare("49.0", "<50"));
        assert!(compare("50.0", "<50.1"));
        assert!(compare("50.0.0", "<50.0.1"));
        assert!(!compare("50.1.0", ">50"));
        assert!(!compare("50.1.0", "<50"));
        assert!(compare("50.1.0", ">=50,<51"));
        assert!(compare("50.0a1", ">49.0"));
        assert!(compare("50.0a2", "=50"));
        assert!(compare("78.1.0esr", ">=78"));
        assert!(compare("78.1.0esr", "<79"));
        assert!(compare("78.1.11esr", "<79"));
        // This is the weird one
        assert!(!compare("50.0a2", ">50.0"));
    }

    #[test]
    fn test_binary_parser() {
        assert!(
            parse_binary_version("Mozilla Firefox 50.0a1")
                .unwrap()
                .to_string()
                == "50.0a1"
        );
        assert!(
            parse_binary_version("Mozilla Firefox 50.0.1a1")
                .unwrap()
                .to_string()
                == "50.0.1a1"
        );
        assert!(
            parse_binary_version("Mozilla Firefox 50.0.0")
                .unwrap()
                .to_string()
                == "50.0"
        );
        assert!(
            parse_binary_version("Mozilla Firefox 78.0.11esr")
                .unwrap()
                .to_string()
                == "78.0.11esr"
        );
        assert!(
            parse_binary_version("Mozilla Firefox 78.0esr")
                .unwrap()
                .to_string()
                == "78.0esr"
        );
        assert!(
            parse_binary_version("Mozilla Firefox 78.0")
                .unwrap()
                .to_string()
                == "78.0"
        );
        assert!(
            parse_binary_version("Foo Firefox 113.0.2-1")
                .unwrap()
                .to_string()
                == "113.0.2-1"
        );
    }
}