Load translations properly when forgebuild is not setup, just cloned

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "i18n"]
 	path = i18n
 	url = https://tildegit.org/southerntofu/git-build-i18n
+[submodule "spec"]
+	path = spec
+	url = https://tildegit.org/forge/build

i18n

@@ -1 +0,0 @@
-Subproject commit 5fd01cce804b3863abb4f465365df8051ba86ab2

spec

@@ -0,0 +1 @@
+Subproject commit c0e3bc649743b53a19c549bb0bfd66e2b62f2866

src/log.rs

@@ -54,30 +54,41 @@ impl Lang {
 
 pub type Context = HashMap<String, String>;
 
-/// Returns a PathBuf containing the translations. Does not mean
-/// the translations are in there!
-/// First attempts to find $FORGEBUILDI18N from env, otherwise tries
-/// $HOME/.local/share/forgebuild/i18n or /usr/local/share/forgebuild/i18n
-fn find_translations() -> PathBuf {
-    match env::var("FORGEBUILDI18N") {
-        Ok(dir) => PathBuf::from(dir),
-        Err(_) => {
-            //let mut path = home_dir().expect("$HOME folder not found");
-            let owner = get_effective_uid();
-            let mut path = get_user_by_uid(owner).expect("Failed owner profile")
-                .home_dir().to_path_buf();
-
-            path.push(".local/share/forgebuild/i18n");
-            println!("{}", path.to_str().unwrap());
-            if path.is_dir() {
-                path
-            } else {
-                // Didn't find from env or in home directory,
-                // return default /usr/share/local/forgebuild/i18n
-                PathBuf::from("/usr/share/local/forgebuild/i18n")
-            }
+/// Finds the JSON translation files checking in order, relative to the program path:
+///   - ../../../build/i18n
+///   - ../../spec/i18n
+///   - $HOME/.local/share/forgebuild/i18n
+///   - /usr/share/forgebuild/i18n
+/// If all of the above fails, but ../../spec/ folder exists (we are in a build.rs repo)
+/// attempt to inialize the spec submodule which may have been forgotten on clone
+fn find_translations() -> Option<PathBuf> {
+    let mut bindir = PathBuf::from(env::args().nth(0).expect("Argument 0 should contain the path to the program"));
+    bindir.pop();
+
+    let mut homedir = get_user_by_uid(get_effective_uid()).expect("Failed owner profile").home_dir();
+
+    let options = [
+        bindir.join("../../../build/i18n"),
+        bindir.join("../../spec/i18n"),
+        get_user_by_uid(get_effective_uid()).expect("Failed to get info about $USER").home_dir().join(".local/share/forgebuild/i18n"),
+        PathBuf::from("/usr/share/forgebuild/i18n"),
+    ];
+
+    let mut found = false;
+    for entry in options {
+        if entry.is_dir() {
+            // We found a matching entry
+            return Some(entry);
         }
     }
+    
+    // Maybe spec folder exists but hasn't been cloned
+    if bindir.join("../../spec/").is_dir() {
+        // TODO: Try to clone
+        unimplemented!("TODO: The spec submodule has not been cloned. We should clone it here. In the meantime, you can do it manually from the build.rs repo using git submodule init && git submodule update");
+    }
+
+    return None;
 }
 
 fn load_translations_from_file(path: &Path) -> HashMap<String, String> {
@@ -102,17 +113,15 @@ fn load_translations() -> HashMap<String, String> {
             load_translations_from_file(&path)
         },
         Lang::Some(lang) => {
-            let mut path = find_translations();
-            if !path.is_dir() {
-                panic!("Could not find translations in {:?}", path);
-            }
-            path.push(format!("{}.json", lang));
-
-            if !path.is_file() {
-                panic!("Could not find translation file: {:?}", path);
+            if let Some(i18ndir) = find_translations() {
+                let i18nfile = i18ndir.join(format!("{}.json", lang));
+                if !i18nfile.is_file() {
+                    panic!("No such translation file: {:?}", i18nfile);
+                }
+                return load_translations_from_file(&i18nfile)
+            } else {
+                panic!("No translation folder found.");
             }
-
-            load_translations_from_file(&path)
         },
         _ => {
             HashMap::new()