Auto merge of #3978 - dethoter:separated-credentials, r=alexcrichton

Move API token into the separate file.

Fix of #3748. BTW, it's not clear what to do with old config.
Should I add a check for old config and try to remove [repository.token] field from it every time user add a new token?
Or should I just prefer to use a token field from a new config over the old one?

src/cargo/ops/registry.rs

@@ -1,8 +1,6 @@
-use std::collections::HashMap;
 use std::env;
 use std::fs::{self, File};
 use std::iter::repeat;
-use std::path::PathBuf;
 use std::time::Duration;
 
 use curl::easy::{Easy, SslOpt};
@@ -19,10 +17,9 @@ use core::dependency::Kind;
 use core::manifest::ManifestMetadata;
 use ops;
 use sources::{RegistrySource};
-use util::config;
+use util::config::{self, Config};
 use util::paths;
 use util::ToUrl;
-use util::config::{Config, ConfigValue, Location};
 use util::errors::{CargoError, CargoResult, CargoResultExt};
 use util::important_paths::find_root_manifest_for_wd;
 
@@ -285,16 +282,14 @@ pub fn http_timeout(config: &Config) -> CargoResult<Option<i64>> {
 }
 
 pub fn registry_login(config: &Config, token: String) -> CargoResult<()> {
-    let RegistryConfig { index, token: _ } = registry_configuration(config)?;
-    let mut map = HashMap::new();
-    let p = config.cwd().to_path_buf();
-    if let Some(index) = index {
-        map.insert("index".to_string(), ConfigValue::String(index, p.clone()));
+    let RegistryConfig { index: _, token: old_token } = registry_configuration(config)?;
+    if let Some(old_token) = old_token {
+        if old_token == token {
+            return Ok(());
+        }
     }
-    map.insert("token".to_string(), ConfigValue::String(token, p));
 
-    config::set_config(config, Location::Global, "registry",
-                       ConfigValue::Table(map, PathBuf::from(".")))
+    config::save_credentials(config, token)
 }
 
 pub struct OwnersOptions {

src/cargo/util/config.rs

@@ -428,11 +428,12 @@ impl Config {
     pub fn load_values(&self) -> CargoResult<HashMap<String, ConfigValue>> {
         let mut cfg = CV::Table(HashMap::new(), PathBuf::from("."));
 
-        walk_tree(&self.cwd, |mut file, path| {
+        walk_tree(&self.cwd, |path| {
             let mut contents = String::new();
+            let mut file = File::open(&path)?;
             file.read_to_string(&mut contents).chain_err(|| {
                 format!("failed to read configuration file `{}`",
-                         path.display())
+                              path.display())
             })?;
             let toml = cargo_toml::parse(&contents,
                                          &path,
@@ -450,13 +451,52 @@ impl Config {
             Ok(())
         }).chain_err(|| "Couldn't load Cargo configuration")?;
 
-
+        self.load_credentials(&mut cfg)?;
         match cfg {
             CV::Table(map, _) => Ok(map),
             _ => unreachable!(),
         }
     }
 
+    fn load_credentials(&self, cfg: &mut ConfigValue) -> CargoResult<()> {
+        let home_path = self.home_path.clone().into_path_unlocked();
+        let credentials = home_path.join("credentials");
+        if !fs::metadata(&credentials).is_ok() {
+            return Ok(());
+        }
+
+        let mut contents = String::new();
+        let mut file = File::open(&credentials)?;
+        file.read_to_string(&mut contents).chain_err(|| {
+            format!("failed to read configuration file `{}`", credentials.display())
+        })?;
+
+        let toml = cargo_toml::parse(&contents,
+                                     &credentials,
+                                     self).chain_err(|| {
+            format!("could not parse TOML configuration in `{}`", credentials.display())
+        })?;
+
+        let value = CV::from_toml(&credentials, toml).chain_err(|| {
+            format!("failed to load TOML configuration from `{}`", credentials.display())
+        })?;
+
+        let mut cfg = match *cfg {
+            CV::Table(ref mut map, _) => map,
+            _ => unreachable!(),
+        };
+
+        let mut registry = cfg.entry("registry".into())
+            .or_insert(CV::Table(HashMap::new(),
+                                 PathBuf::from(".")));
+        registry.merge(value).chain_err(|| {
+            format!("failed to merge configuration at `{}`",
+                          credentials.display())
+        })?;
+
+        Ok(())
+    }
+
     /// Look for a path for `tool` in an environment variable or config path, but return `None`
     /// if it's not present.
     fn maybe_get_tool(&self, tool: &str) -> CargoResult<Option<PathBuf>> {
@@ -575,6 +615,21 @@ impl ConfigValue {
         }
     }
 
+    fn into_toml(self) -> toml::Value {
+        match self {
+            CV::Boolean(s, _) => toml::Value::Boolean(s),
+            CV::String(s, _) => toml::Value::String(s),
+            CV::Integer(i, _) => toml::Value::Integer(i),
+            CV::List(l, _) => toml::Value::Array(l
+                                          .into_iter()
+                                          .map(|(s, _)| toml::Value::String(s))
+                                          .collect()),
+            CV::Table(l, _) => toml::Value::Table(l.into_iter()
+                                          .map(|(k, v)| (k, v.into_toml()))
+                                          .collect()),
+        }
+    }
+
     fn merge(&mut self, from: ConfigValue) -> CargoResult<()> {
         match (self, from) {
             (&mut CV::String(..), CV::String(..)) |
@@ -676,21 +731,6 @@ impl ConfigValue {
                     wanted, self.desc(), key,
                     self.definition_path().display()).into())
     }
-
-    fn into_toml(self) -> toml::Value {
-        match self {
-            CV::Boolean(s, _) => toml::Value::Boolean(s),
-            CV::String(s, _) => toml::Value::String(s),
-            CV::Integer(i, _) => toml::Value::Integer(i),
-            CV::List(l, _) => toml::Value::Array(l
-                                          .into_iter()
-                                          .map(|(s, _)| toml::Value::String(s))
-                                          .collect()),
-            CV::Table(l, _) => toml::Value::Table(l.into_iter()
-                                          .map(|(k, v)| (k, v.into_toml()))
-                                          .collect()),
-        }
-    }
 }
 
 impl Definition {
@@ -762,17 +802,14 @@ pub fn homedir(cwd: &Path) -> Option<PathBuf> {
 }
 
 fn walk_tree<F>(pwd: &Path, mut walk: F) -> CargoResult<()>
-    where F: FnMut(File, &Path) -> CargoResult<()>
+    where F: FnMut(&Path) -> CargoResult<()>
 {
     let mut stash: HashSet<PathBuf> = HashSet::new();
 
     for current in paths::ancestors(pwd) {
         let possible = current.join(".cargo").join("config");
         if fs::metadata(&possible).is_ok() {
-            let file = File::open(&possible)?;
-
-            walk(file, &possible)?;
-
+            walk(&possible)?;
             stash.insert(possible);
         }
     }
@@ -786,40 +823,52 @@ fn walk_tree<F>(pwd: &Path, mut walk: F) -> CargoResult<()>
     })?;
     let config = home.join("config");
     if !stash.contains(&config) && fs::metadata(&config).is_ok() {
-        let file = File::open(&config)?;
-        walk(file, &config)?;
+        walk(&config)?;
     }
 
     Ok(())
 }
 
-pub fn set_config(cfg: &Config,
-                  loc: Location,
-                  key: &str,
-                  value: ConfigValue) -> CargoResult<()> {
-    // TODO: There are a number of drawbacks here
-    //
-    // 1. Project is unimplemented
-    // 2. This blows away all comments in a file
-    // 3. This blows away the previous ordering of a file.
-    let mut file = match loc {
-        Location::Global => {
-            cfg.home_path.create_dir()?;
-            cfg.home_path.open_rw(Path::new("config"), cfg,
-                                       "the global config file")?
-        }
-        Location::Project => unimplemented!(),
+pub fn save_credentials(cfg: &Config,
+                       token: String) -> CargoResult<()> {
+    let mut file = {
+        cfg.home_path.create_dir()?;
+        cfg.home_path.open_rw(Path::new("credentials"), cfg,
+                                   "credentials' config file")?
     };
+
     let mut contents = String::new();
-    let _ = file.read_to_string(&mut contents);
+    file.read_to_string(&mut contents).chain_err(|| {
+        format!("failed to read configuration file `{}`",
+                      file.path().display())
+    })?;
     let mut toml = cargo_toml::parse(&contents, file.path(), cfg)?;
     toml.as_table_mut()
         .unwrap()
-        .insert(key.to_string(), value.into_toml());
+        .insert("token".to_string(),
+                ConfigValue::String(token, file.path().to_path_buf()).into_toml());
 
     let contents = toml.to_string();
     file.seek(SeekFrom::Start(0))?;
     file.write_all(contents.as_bytes())?;
     file.file().set_len(contents.len() as u64)?;
-    Ok(())
+    set_permissions(file.file(), 0o600)?;
+
+    return Ok(());
+
+    #[cfg(unix)]
+    fn set_permissions(file: & File, mode: u32) -> CargoResult<()> {
+        use std::os::unix::fs::PermissionsExt;
+
+        let mut perms = file.metadata()?.permissions();
+        perms.set_mode(mode);
+        file.set_permissions(perms)?;
+        Ok(())
+    }
+
+    #[cfg(not(unix))]
+    #[allow(unused)]
+    fn set_permissions(file: & File, mode: u32) -> CargoResult<()> {
+        Ok(())
+    }
 }

src/doc/crates-io.md

@@ -21,7 +21,8 @@ $ cargo login abcdefghijklmnopqrstuvwxyz012345
 ```
 
 This command will inform Cargo of your API token and store it locally in your
-`~/.cargo/config`. Note that this token is a **secret** and should not be shared
+`~/.cargo/credentials` (previously it was `~/.cargo/config`).
+Note that this token is a **secret** and should not be shared
 with anyone else. If it leaks for any reason, you should regenerate it
 immediately.
 

tests/login.rs

@@ -0,0 +1,112 @@
+#[macro_use]
+extern crate cargotest;
+extern crate cargo;
+extern crate hamcrest;
+extern crate toml;
+
+use std::io::prelude::*;
+use std::fs::{self, File};
+
+use cargotest::cargo_process;
+use cargotest::support::execs;
+use cargotest::support::registry::registry;
+use cargotest::install::cargo_home;
+use hamcrest::{assert_that, existing_file, is_not};
+
+const TOKEN: &str = "test-token";
+const CONFIG_FILE: &str = r#"
+    [registry]
+    token = "api-token"
+"#;
+
+fn setup_old_credentials() {
+    let config = cargo_home().join("config");
+    t!(fs::create_dir_all(config.parent().unwrap()));
+    t!(t!(File::create(&config)).write_all(&CONFIG_FILE.as_bytes()));
+}
+
+fn setup_new_credentials() {
+    let config = cargo_home().join("credentials");
+    t!(fs::create_dir_all(config.parent().unwrap()));
+    t!(t!(File::create(&config)).write_all(br#"
+        token = "api-token"
+    "#));
+}
+
+fn check_host_token(toml: toml::Value) -> bool {
+    match toml {
+        toml::Value::Table(table) => match table.get("token") {
+            Some(v) => match v {
+                &toml::Value::String(ref token) => (token.as_str() == TOKEN),
+                _ => false,
+            },
+            None => false,
+        },
+        _ => false,
+    }
+}
+
+#[test]
+fn login_with_old_credentials() {
+    setup_old_credentials();
+
+    assert_that(cargo_process().arg("login")
+                .arg("--host").arg(registry().to_string()).arg(TOKEN),
+                execs().with_status(0));
+
+    let config = cargo_home().join("config");
+    assert_that(&config, existing_file());
+
+    let mut contents = String::new();
+    File::open(&config).unwrap().read_to_string(&mut contents).unwrap();
+    assert!(CONFIG_FILE == &contents);
+
+    let credentials = cargo_home().join("credentials");
+    assert_that(&credentials, existing_file());
+
+    contents.clear();
+    File::open(&credentials).unwrap().read_to_string(&mut contents).unwrap();
+    assert!(check_host_token(contents.parse().unwrap()));
+}
+
+#[test]
+fn login_with_new_credentials() {
+    setup_new_credentials();
+
+    assert_that(cargo_process().arg("login")
+                .arg("--host").arg(registry().to_string()).arg(TOKEN),
+                execs().with_status(0));
+
+    let config = cargo_home().join("config");
+    assert_that(&config, is_not(existing_file()));
+
+    let credentials = cargo_home().join("credentials");
+    assert_that(&credentials, existing_file());
+
+    let mut contents = String::new();
+    File::open(&credentials).unwrap().read_to_string(&mut contents).unwrap();
+    assert!(check_host_token(contents.parse().unwrap()));
+}
+
+#[test]
+fn login_with_old_and_new_credentials() {
+    setup_new_credentials();
+    login_with_old_credentials();
+}
+
+#[test]
+fn login_without_credentials() {
+    assert_that(cargo_process().arg("login")
+                .arg("--host").arg(registry().to_string()).arg(TOKEN),
+                execs().with_status(0));
+
+    let config = cargo_home().join("config");
+    assert_that(&config, is_not(existing_file()));
+
+    let credentials = cargo_home().join("credentials");
+    assert_that(&credentials, existing_file());
+
+    let mut contents = String::new();
+    File::open(&credentials).unwrap().read_to_string(&mut contents).unwrap();
+    assert!(check_host_token(contents.parse().unwrap()));
+}