[chshersh#55] fetch exe_name from api if ommited

Resolves [chshersh#55]

src/sync/configure.rs

@@ -2,6 +2,7 @@ use crate::config::schema::ConfigAsset;
 use crate::model::asset_name::AssetName;
 use crate::model::tool::{Tool, ToolError, ToolInfo, ToolInfoTag};
 use crate::sync::db::lookup_tool;
+use serde::Deserialize;
 
 pub fn configure_tool(tool_name: &str, config_asset: &ConfigAsset) -> Tool {
     match lookup_tool(tool_name) {
@@ -27,11 +28,31 @@ pub fn configure_tool(tool_name: &str, config_asset: &ConfigAsset) -> Tool {
     }
 }
 
+#[derive(Deserialize)]
+pub struct RepoInformation {
+    pub name: String,
+    // There are other fields too, but we don't need them now
+    // They may be added later if needed at all
+}
+
+fn get_exe_name(owner: String, repo: String) -> Result<String, ureq::Error> {
+    let url = format!(
+        "https://api.github.com/repos/{owner}/{repo}",
+        owner = owner,
+        repo = repo
+    );
+    let repo: RepoInformation = ureq::get(&url).call()?.into_json()?;
+    Ok(repo.name)
+}
+
 /// Configure 'ToolInfo' completely from 'ConfigAsset'
 fn full_configure(config_asset: &ConfigAsset) -> Option<ToolInfo> {
     let owner = config_asset.owner.clone()?;
     let repo = config_asset.repo.clone()?;
-    let exe_name = config_asset.exe_name.clone()?;
+    let exe_name = match config_asset.exe_name.clone() {
+        Some(exe_name) => exe_name,
+        None => get_exe_name(owner.clone(), repo.clone()).unwrap(),
+    };
     let tag = config_asset
         .tag
         .clone()
@@ -219,6 +240,38 @@ mod tests {
         );
     }
 
+    #[test]
+    fn get_exe_name() {
+        let tool_name = "abcdef";
+
+        let config_asset = ConfigAsset {
+            owner: Some(String::from("chshersh")),
+            repo: Some(String::from("tool-sync")),
+            exe_name: None,
+            asset_name: AssetName {
+                linux: Some(String::from("my-linux")),
+                macos: Some(String::from("my-macos")),
+                windows: Some(String::from("yours-windows")),
+            },
+            tag: Some(String::from("1.0.0")),
+        };
+
+        assert_eq!(
+            configure_tool(tool_name, &config_asset),
+            Tool::Known(ToolInfo {
+                owner: "chshersh".to_string(),
+                repo: "tool-sync".to_string(),
+                exe_name: "tool-sync".to_string(),
+                asset_name: AssetName {
+                    linux: Some("my-linux".to_string()),
+                    macos: Some("my-macos".to_string()),
+                    windows: Some("yours-windows".to_string()),
+                },
+                tag: ToolInfoTag::Specific("1.0.0".to_string()),
+            })
+        );
+    }
+
     #[test]
     fn partial_override() {
         let tool_name = "ripgrep";