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

use std::error;
use std::fs;
use std::fs::File;
use std::io::Read;

extern crate toml_edit;
use toml_edit::Document;

extern crate reqwest;

extern crate serde_json;
use serde_json::Value;
use reqwest::header::USER_AGENT;

pub fn update_toml_file(
    filename: &str,
    unsafe_file_updates: bool,
) -> Result<(), Box<dyn error::Error>> {
    println!("Reading file: {}", filename);

    let mut contents = String::new();
    {
        let mut f = File::open(filename)?;
        f.read_to_string(&mut contents)
            .expect("Something went wrong reading the file.");
    }

    let new_contents = update_toml(&contents)?;
    if new_contents == contents {
        return Ok(());
    }

    if !unsafe_file_updates {
        let filename_old = filename.to_string() + ".old";
        let _ = fs::remove_file(&filename_old);
        fs::copy(filename, filename_old)?;
    }

    fs::write(filename, new_contents)?;
    Ok(())
}

#[test]
fn test_update_toml() {
    let toml = r#"
[package]
version = "0.1.0"

[dependencies]
reqwest = { version = "0.10.3", features = ["blocking"] }
structopt = "0.2"
toml_edit = "0.1.3"
    "#;

    let expected = r#"
[package]
version = "0.1.0"

[dependencies]
reqwest = { version = "0.10.4", features = ["blocking"] }
structopt = "0.3.14"
toml_edit = "0.1.5"
    "#;

    let result = update_toml(toml).unwrap();
    assert_eq!(result, expected);
}

fn update_toml(toml: &str) -> Result<String, Box<dyn error::Error>> {
    let doc = toml.parse::<Document>()?;

    let mut updates_crate = Vec::new();
    let mut updates_crate_version = Vec::new();

    let table = &doc["dependencies"].as_table().unwrap();
    for (the_crate, item) in table.iter() {
        println!("\tFound: {}", the_crate);

        let value = item.as_value().unwrap();
        if let Some(local_version) = value.as_str() {
            let local_version = local_version.trim();
            println!("\t\tLocal version:  {}", local_version);

            let online_version = lookup_latest_version(&the_crate)?;
            println!("\t\tOnline version: {}", &online_version);

            if local_version != online_version {
                updates_crate.push((the_crate.to_string(), toml_edit::value(online_version)));
            }
        }
        else if let Some(inline_table) =  value.as_inline_table() {
            if let Some(value) = inline_table.get("version") {
                if let Some(local_version) = value.as_str() {
                    let local_version = local_version.trim();
                    println!("\t\tLocal version:  {}", local_version);

                    let online_version = lookup_latest_version(&the_crate)?;
                    println!("\t\tOnline version: {}", &online_version);

                    if local_version != online_version {
                        updates_crate_version.push((the_crate.to_string(), toml_edit::value(online_version)));
                    }
                }
            }
        }
        else {
            println!("** Error: Can not parse {}", &value);
        }
    }

    let mut doc = doc;
    for (the_crate, version) in updates_crate {
        doc["dependencies"][&the_crate] = version;
    }
    for (the_crate, version) in updates_crate_version {
        doc["dependencies"][&the_crate]["version"] = version;
    }

    Ok(doc.to_string())
}

fn lookup_latest_version(crate_name: &str) -> Result<String, Box<dyn error::Error>> {

    const NAME: &'static str = env!("CARGO_PKG_NAME");
    const VERSION: &'static str = env!("CARGO_PKG_VERSION");
    const REPO: &'static str = env!("CARGO_PKG_REPOSITORY");
    let user_agent = format!("{} {} ( {} )", NAME, VERSION, REPO);

    let uri = format!("https://crates.io/api/v1/crates/{}", crate_name);

    let client = reqwest::blocking::Client::new();
    let http_body = client.get(&uri)
        .header(USER_AGENT, &user_agent)
        .send()?
        .text()?;

    let json_doc: Value = serde_json::from_str(&http_body)?;
    let mut version: String = json_doc["versions"][0]["num"].to_string();

    if version.starts_with('"') {
        version = version.get(1..).unwrap().to_string();
    }
    if version.ends_with('"') {
        let end = version.len() - 1;
        version = version.get(..end).unwrap().to_string();
    }

    Ok(version)
}