Allow passing a file to lovr;

The file will be treated as main.lua.
Its directory will be treated as the source.

etc/boot.lua

@@ -143,7 +143,8 @@ function lovr.boot()
   }
 
   lovr.filesystem = require('lovr.filesystem')
-  local hasConf, hasMain = lovr.filesystem.isFile('conf.lua'), lovr.filesystem.isFile('main.lua')
+  local main = arg[0] and arg[0]:match('[^\\/]-%.lua$') or 'main.lua'
+  local hasConf, hasMain = lovr.filesystem.isFile('conf.lua'), lovr.filesystem.isFile(main)
   if not lovr.filesystem.getSource() or not (hasConf or hasMain) then nogame() end
 
   -- Shift args up in fused mode, instead of consuming one for the source path
@@ -178,7 +179,7 @@ function lovr.boot()
 
   lovr.handlers = setmetatable({}, { __index = lovr })
   if not confOk then error(confError) end
-  if hasMain then require 'main' end
+  if hasMain then require(main:gsub('%.lua$', '')) end
   return lovr.run()
 end
 

src/main.c

@@ -35,10 +35,12 @@ int main(int argc, char** argv) {
   if (argc > 1 && (!strcmp(argv[1], "--help") || !strcmp(argv[1], "-h"))) {
     os_open_console();
     printf(
-      "usage: lovr [options] [<folder>]\n"
+      "usage: lovr [options] [<source>]\n\n"
+      "options:\n"
       "  -h, --help\t\tShow help and exit\n"
       "  -v, --version\t\tShow version and exit\n"
-      "  --console\t\tAttach Windows console\n"
+      "  --console\t\tAttach Windows console\n\n"
+      "<source> can be a Lua file, a folder, or a zip archive\n"
     );
     exit(0);
   }

src/modules/filesystem/filesystem.c

@@ -148,6 +148,22 @@ bool lovrFilesystemInit(const char* archive) {
   if (archive) {
     state.source[LOVR_PATH_MAX - 1] = '\0';
     strncpy(state.source, archive, LOVR_PATH_MAX - 1);
+
+    // If the command line parameter is a file, use its containing folder as the source
+    size_t length = strlen(state.source);
+    if (length > 4 && !memcmp(state.source + length - 4, ".lua", 4)) {
+      char* slash = strrchr(state.source, '/');
+
+      if (slash) {
+        *slash = '\0';
+      } else if ((slash = strrchr(state.source, '\\')) != NULL) {
+        *slash = '\0';
+      } else {
+        state.source[0] = '.';
+        state.source[1] = '\0';
+      }
+    }
+
     if (lovrFilesystemMount(state.source, NULL, true, NULL)) {
       return true;
     }