Auto detect and use fvm

frb_codegen/src/library/commands/dart_build_runner.rs

@@ -1,5 +1,6 @@
 use crate::command_run;
 use crate::commands::command_runner::call_shell;
+use crate::library::commands::fvm::command_arg_maybe_fvm;
 use crate::utils::dart_repository::dart_repo::DartRepository;
 use anyhow::bail;
 use log::debug;
@@ -9,9 +10,10 @@ use std::path::Path;
 pub fn dart_build_runner(dart_root: &Path) -> anyhow::Result<()> {
     debug!("Running build_runner at dart_root={dart_root:?}");
 
-    let repo = DartRepository::from_path(dart_root).unwrap();
+    let repo = DartRepository::from_path(dart_root)?;
     let out = command_run!(
         call_shell[Some(dart_root), Some(dart_run_extra_env())],
+        ?command_arg_maybe_fvm(Some(dart_root)),
         *repo.toolchain.as_run_command(),
         *repo.command_extra_args(),
         "run",

frb_codegen/src/library/commands/dart_fix.rs

@@ -1,6 +1,7 @@
 use crate::command_run;
 use crate::commands::command_runner::call_shell;
 use crate::library::commands::command_runner::check_exit_code;
+use crate::library::commands::fvm::command_arg_maybe_fvm;
 use anyhow::Result;
 use log::debug;
 use std::path::Path;
@@ -11,6 +12,7 @@ pub fn dart_fix(base_path: &Path) -> Result<()> {
 
     let res = command_run!(
         call_shell[Some(base_path), None],
+        ?command_arg_maybe_fvm(Some(base_path)),
         "dart",
         "fix",
         "--apply",

frb_codegen/src/library/commands/dart_format.rs

@@ -1,6 +1,7 @@
 use crate::command_run;
 use crate::commands::command_runner::call_shell;
 use crate::library::commands::command_runner::check_exit_code;
+use crate::library::commands::fvm::command_arg_maybe_fvm;
 use crate::utils::path_utils::{normalize_windows_unc_path, path_to_string};
 use anyhow::Context;
 use itertools::Itertools;
@@ -24,6 +25,7 @@ pub fn dart_format(
 
     let res = command_run!(
         call_shell[Some(base_path), None],
+        ?command_arg_maybe_fvm(Some(base_path)),
         "dart",
         "format",
         "--line-length",

frb_codegen/src/library/commands/flutter.rs

@@ -1,6 +1,7 @@
 use crate::command_run;
 use crate::commands::command_runner::call_shell;
 use crate::library::commands::command_runner::check_exit_code;
+use crate::library::commands::fvm::command_arg_maybe_fvm;
 use crate::misc::Template;
 use log::info;
 use std::path::Path;
@@ -24,7 +25,11 @@ pub fn flutter_create(name: &str, org: &Option<String>, template: Template) -> a
         "Execute `flutter create {}` (this may take a while)",
         args.join(" ")
     );
-    check_exit_code(&command_run!(call_shell[None, None], "flutter", "create", *args)?)
+    check_exit_code(&command_run!(
+        call_shell[None, None],
+        ?command_arg_maybe_fvm(None),
+        "flutter", "create", *args
+    )?)
 }
 
 #[allow(clippy::vec_init_then_push)]
@@ -35,6 +40,7 @@ pub fn flutter_pub_add(items: &[String], pwd: Option<&Path>) -> anyhow::Result<(
     );
     check_exit_code(&command_run!(
         call_shell[pwd, None],
+        ?command_arg_maybe_fvm(pwd),
         "flutter",
         "pub",
         "add",
@@ -45,5 +51,9 @@ pub fn flutter_pub_add(items: &[String], pwd: Option<&Path>) -> anyhow::Result<(
 #[allow(clippy::vec_init_then_push)]
 pub fn flutter_pub_get(path: &Path) -> anyhow::Result<()> {
     info!("Execute `flutter pub get` inside {path:?} (this may take a while)");
-    check_exit_code(&command_run!(call_shell[Some(path), None], "flutter", "pub", "get")?)
+    check_exit_code(&command_run!(
+        call_shell[Some(path), None],
+        ?command_arg_maybe_fvm(Some(path)),
+        "flutter", "pub", "get"
+    )?)
 }

frb_codegen/src/library/commands/fvm.rs

@@ -0,0 +1,42 @@
+use crate::command_run;
+use crate::library::commands::command_runner::call_shell;
+use std::path::Path;
+
+pub(crate) fn command_arg_maybe_fvm(pwd: Option<&Path>) -> Option<String> {
+    if should_use_fvm(pwd) {
+        Some("fvm".to_owned())
+    } else {
+        None
+    }
+}
+
+fn should_use_fvm(pwd: Option<&Path>) -> bool {
+    if pwd.is_some() && !has_fvmrc(pwd.unwrap()) {
+        false
+    } else {
+        let has_fvm_installation_output = has_fvm_installation();
+        if !has_fvm_installation_output {
+            log::info!("Has .fvmrc but no fvm binary installation, thus skip using fvm.");
+        }
+        has_fvm_installation_output
+    }
+}
+
+fn has_fvmrc(pwd: &Path) -> bool {
+    let mut directory = pwd;
+    loop {
+        if directory.join(".fvmrc").exists() {
+            return true;
+        }
+        if let Some(parent) = directory.parent() {
+            directory = parent;
+        } else {
+            return false;
+        }
+    }
+}
+
+fn has_fvm_installation() -> bool {
+    command_run!(call_shell[None, None], "fvm", "--version")
+        .map_or(false, |res| res.status.success())
+}

frb_codegen/src/library/commands/mod.rs

@@ -10,3 +10,4 @@ pub(crate) mod ensure_tools_available;
 pub(crate) mod ffigen;
 pub(crate) mod flutter;
 pub(crate) mod format_rust;
+pub(crate) mod fvm;