feat: Button to install NorthstarLauncher from git main branch (#314)

* feat: WIP code to install launcher from git main

Works but needs some more cleanup still

* fix: Formatting

* fix: Address clippy errors

* refactor: Move `install_git_main` to own source
file

* fix: Remove unnecessary `pub`

* docs: Update comments

* refactor: Move API URL to constants

5 files changed, 94 insertions, 3 deletions

diff --git a/src-tauri/src/constants.rs b/src-tauri/src/constants.rs
index 43df0eeb..4005a139 100644
--- a/src-tauri/src/constants.rs
+++ b/src-tauri/src/constants.rs
@@ -51,3 +51,7 @@ pub const FLIGHTCORE_REPO_NAME: &str = "R2NorthstarTools/FlightCore";
 
 // Northstar release repo name and org name on GitHub
 pub const NORTHSTAR_RELEASE_REPO_NAME: &str = "R2Northstar/Northstar";
+
+// URL to launcher commits API URL
+pub const NS_LAUNCHER_COMMITS_API_URL: &str =
+    "https://api.github.com/repos/R2Northstar/NorthstarLauncher/commits";
diff --git a/src-tauri/src/development/mod.rs b/src-tauri/src/development/mod.rs
new file mode 100644
index 00000000..be02966d
--- /dev/null
+++ b/src-tauri/src/development/mod.rs
@@ -0,0 +1,84 @@
+use crate::constants::NS_LAUNCHER_COMMITS_API_URL;
+use crate::github::{
+    pull_requests::{check_github_api, download_zip_into_memory, get_launcher_download_link},
+    CommitInfo,
+};
+
+#[tauri::command]
+pub async fn install_git_main(game_install_path: &str) -> Result<String, String> {
+    // Get list of commits
+    let commits: Vec<CommitInfo> = serde_json::from_value(
+        check_github_api(NS_LAUNCHER_COMMITS_API_URL)
+            .await
+            .expect("Failed request"),
+    )
+    .unwrap();
+
+    // Get latest commit...
+    let latest_commit_sha = commits[0].sha.clone();
+    // ...and according artifact download URL
+    let download_url = get_launcher_download_link(latest_commit_sha.clone()).await?;
+
+    let archive = match download_zip_into_memory(download_url).await {
+        Ok(archive) => archive,
+        Err(err) => return Err(err.to_string()),
+    };
+
+    let extract_directory = format!(
+        "{}/___flightcore-temp-download-dir/launcher-pr-{}",
+        game_install_path, latest_commit_sha
+    );
+    match std::fs::create_dir_all(extract_directory.clone()) {
+        Ok(_) => (),
+        Err(err) => {
+            return Err(format!(
+                "Failed creating temporary download directory: {}",
+                err
+            ))
+        }
+    };
+
+    let target_dir = std::path::PathBuf::from(extract_directory.clone()); // Doesn't need to exist
+    match zip_extract::extract(std::io::Cursor::new(archive), &target_dir, true) {
+        Ok(()) => (),
+        Err(err) => {
+            return Err(format!("Failed unzip: {}", err));
+        }
+    };
+
+    // Copy only necessary files from temp dir
+    // Copy:
+    // - NorthstarLauncher.exe
+    // - Northstar.dll
+    let files_to_copy = vec!["NorthstarLauncher.exe", "Northstar.dll"];
+    for file_name in files_to_copy {
+        let source_file_path = format!("{}/{}", extract_directory, file_name);
+        let destination_file_path = format!("{}/{}", game_install_path, file_name);
+        match std::fs::copy(source_file_path, destination_file_path) {
+            Ok(_result) => (),
+            Err(err) => {
+                return Err(format!(
+                    "Failed to copy necessary file {} from temp dir: {}",
+                    file_name, err
+                ))
+            }
+        };
+    }
+
+    // delete extract directory
+    match std::fs::remove_dir_all(&extract_directory) {
+        Ok(()) => (),
+        Err(err) => {
+            return Err(format!(
+                "Failed to delete temporary download directory: {}",
+                err
+            ))
+        }
+    }
+
+    log::info!(
+        "All done with installing launcher from {}",
+        latest_commit_sha
+    );
+    Ok(latest_commit_sha)
+}
diff --git a/src-tauri/src/github/mod.rs b/src-tauri/src/github/mod.rs
index a4e390d3..0eab305b 100644
--- a/src-tauri/src/github/mod.rs
+++ b/src-tauri/src/github/mod.rs
@@ -31,8 +31,8 @@ pub struct TagWrapper {
 }
 
 #[derive(Debug, Deserialize)]
-struct CommitInfo {
-    sha: String,
+pub struct CommitInfo {
+    pub sha: String,
     commit: Commit,
     author: Option<CommitAuthor>,
 }
diff --git a/src-tauri/src/github/pull_requests.rs b/src-tauri/src/github/pull_requests.rs
index e600e2e4..b30fd272 100644
--- a/src-tauri/src/github/pull_requests.rs
+++ b/src-tauri/src/github/pull_requests.rs
@@ -127,7 +127,7 @@ pub async fn check_github_api(url: &str) -> Result<serde_json::Value, Box<dyn st
 }
 
 /// Downloads a file from given URL into an array in memory
-async fn download_zip_into_memory(download_url: String) -> Result<Vec<u8>, anyhow::Error> {
+pub async fn download_zip_into_memory(download_url: String) -> Result<Vec<u8>, anyhow::Error> {
     let client = reqwest::Client::builder()
         .user_agent(APP_USER_AGENT)
         .build()?;
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index 87f70ae2..9a93d636 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -16,6 +16,8 @@ use winapi::um::winuser::{MessageBoxW, MB_ICONERROR, MB_OK, MB_USERICON};
 
 use crate::constants::REFRESH_DELAY;
 
+mod development;
+
 mod github;
 use github::release_notes::check_is_flightcore_outdated;
 
@@ -159,6 +161,7 @@ fn main() {
             github::pull_requests::apply_mods_pr,
             github::pull_requests::get_launcher_download_link,
             close_application,
+            development::install_git_main,
             get_available_northstar_versions,
         ])
         .run(tauri::generate_context!())