add scarb fetch

scarb/src/bin/scarb/args.rs

@@ -126,6 +126,8 @@ pub enum Command {
     Clean,
     /// List installed commands.
     Commands,
+    // Fetch dependencies of packages from the network.
+    Fetch,
     /// Format project files.
     Fmt(FmtArgs),
     /// Create a new Scarb package in existing directory.

scarb/src/bin/scarb/commands/fetch.rs

@@ -0,0 +1,14 @@
+use anyhow::Result;
+
+use scarb::core::Config;
+use scarb::ops;
+
+#[tracing::instrument(skip_all, level = "info")]
+pub fn run(config: &Config) -> Result<()> {
+    let ws = ops::read_workspace(config.manifest_path(), config)?;
+
+    match ops::resolve_workspace(&ws) {
+        Ok(_) => Ok(()),
+        Err(e) => Err(e),
+    }
+}

scarb/src/bin/scarb/commands/mod.rs

@@ -11,6 +11,7 @@ pub mod build;
 pub mod clean;
 pub mod commands;
 pub mod external;
+pub mod fetch;
 pub mod fmt;
 pub mod init;
 pub mod manifest_path;
@@ -30,6 +31,7 @@ pub fn run(command: Command, config: &mut Config) -> Result<()> {
         Clean => clean::run(config),
         Commands => commands::run(config),
         External(args) => external::run(args, config),
+        Fetch => fetch::run(config),
         Fmt(args) => fmt::run(args, config),
         Init(args) => init::run(args, config),
         ManifestPath => manifest_path::run(config),

scarb/tests/fetch.rs

@@ -0,0 +1,42 @@
+use indoc::indoc;
+use scarb_test_support::gitx;
+
+use scarb_test_support::command::Scarb;
+use scarb_test_support::project_builder::ProjectBuilder;
+
+#[test]
+fn simple() {
+    let t = assert_fs::TempDir::new().unwrap();
+    ProjectBuilder::start()
+        .name("hello")
+        .version("0.1.0")
+        .build(&t);
+
+    Scarb::quick_snapbox()
+        .arg("fetch")
+        .current_dir(&t)
+        .assert()
+        .success();
+}
+
+#[test]
+fn check_git_fetch_stdout() {
+    let t = assert_fs::TempDir::new().unwrap();
+
+    let git_dep = gitx::new("dep1", |t| ProjectBuilder::start().name("dep1").build(&t));
+
+    ProjectBuilder::start()
+        .name("hello")
+        .version("0.1.0")
+        .dep("dep1", &git_dep)
+        .build(&t);
+
+    Scarb::quick_snapbox()
+        .arg("fetch")
+        .current_dir(&t)
+        .assert()
+        .success()
+        .stdout_matches(indoc! {r#"
+        [..]  Updating git repository file://[..]/dep1
+        "#});
+}