From 66a4d40893199fbee5eed5abd3c91aad0a3cce2b Mon Sep 17 00:00:00 2001
From: Hisham <hisham@gobolinux.org>
Date: Wed, 19 Oct 2016 12:43:41 -0400
Subject: Refactor error message and add extra checks.

---
 src/luarocks/manif.lua        |  4 +++-
 src/luarocks/manif/writer.lua |  6 ++----
 src/luarocks/pack.lua         |  6 ++----
 src/luarocks/repos.lua        | 17 +++++++++--------
 4 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/src/luarocks/manif.lua b/src/luarocks/manif.lua
index 680b5cfe..bd6fd6ee 100644
--- a/src/luarocks/manif.lua
+++ b/src/luarocks/manif.lua
@@ -25,7 +25,9 @@ function manif.load_rock_manifest(name, version, root)
    end
    local pathname = path.rock_manifest_file(name, version, root)
    local rock_manifest = persist.load_into_table(pathname)
-   if not rock_manifest then return nil end
+   if not rock_manifest then
+      return nil, "rock_manifest file not found for "..name.." "..version.." - not a LuaRocks tree?"
+   end
    manif.rock_manifest_cache[name_version] = rock_manifest
    return rock_manifest.rock_manifest
 end
diff --git a/src/luarocks/manif/writer.lua b/src/luarocks/manif/writer.lua
index 75ea3b81..1eb5ee7c 100644
--- a/src/luarocks/manif/writer.lua
+++ b/src/luarocks/manif/writer.lua
@@ -189,10 +189,8 @@ local function store_results(results, manifest, dep_handler)
             local entrytable = {}
             entrytable.arch = entry.arch
             if entry.arch == "installed" then
-               local rock_manifest = manif.load_rock_manifest(name, version)
-               if not rock_manifest then
-                  return nil, "rock_manifest file not found for "..name.." "..version.." - not a LuaRocks 2 tree?"
-               end
+               local rock_manifest, err = manif.load_rock_manifest(name, version)
+               if not rock_manifest then return nil, err end
                entrytable.modules = store_package_items(repos.package_modules, name, version, manifest.modules)
                entrytable.commands = store_package_items(repos.package_commands, name, version, manifest.commands)
             end
diff --git a/src/luarocks/pack.lua b/src/luarocks/pack.lua
index 989d49ee..49c68e85 100644
--- a/src/luarocks/pack.lua
+++ b/src/luarocks/pack.lua
@@ -102,10 +102,8 @@ local function do_pack_binary_rock(name, version, tree)
       return nil, "'"..name.." "..version.."' does not seem to be an installed rock."
    end
    
-   local rock_manifest = manif.load_rock_manifest(name, version, root)
-   if not rock_manifest then
-      return nil, "rock_manifest file not found for "..name.." "..version.." - not a LuaRocks 2 tree?"
-   end
+   local rock_manifest, err = manif.load_rock_manifest(name, version, root)
+   if not rock_manifest then return nil, err end
 
    local name_version = name .. "-" .. version
    local rock_file = fs.absolute_name(name_version .. "."..cfg.arch..".rock")
diff --git a/src/luarocks/repos.lua b/src/luarocks/repos.lua
index f1d58da0..0ed9068c 100644
--- a/src/luarocks/repos.lua
+++ b/src/luarocks/repos.lua
@@ -78,6 +78,7 @@ function repos.package_modules(package, version)
 
    local result = {}
    local rock_manifest = manif.load_rock_manifest(package, version)
+   if not rock_manifest then return result end
    store_package_data(result, package, rock_manifest.lib)
    store_package_data(result, package, rock_manifest.lua)
    return result
@@ -97,6 +98,7 @@ function repos.package_commands(package, version)
 
    local result = {}
    local rock_manifest = manif.load_rock_manifest(package, version)
+   if not rock_manifest then return result end
    store_package_data(result, package, rock_manifest.bin)
    return result
 end
@@ -112,7 +114,7 @@ function repos.has_binaries(name, version)
    assert(type(version) == "string")
 
    local rock_manifest = manif.load_rock_manifest(name, version)
-   if rock_manifest.bin then
+   if rock_manifest and rock_manifest.bin then
       for name, md5 in pairs(rock_manifest.bin) do
          -- TODO verify that it is the same file. If it isn't, find the actual command.
          if fs.is_actual_binary(dir.path(cfg.deploy_bin_dir, name)) then
@@ -196,7 +198,7 @@ function repos.deploy_files(name, version, wrap_bin_scripts)
 
    local function deploy_file_tree(file_tree, path_fn, deploy_dir, move_fn)
       local source_dir = path_fn(name, version)
-      return recurse_rock_manifest_tree(file_tree, 
+      return recurse_rock_manifest_tree(file_tree,
          function(parent_path, parent_module, file)
             local source = dir.path(source_dir, parent_path, file)
             local target = dir.path(deploy_dir, parent_path, file)
@@ -226,7 +228,8 @@ function repos.deploy_files(name, version, wrap_bin_scripts)
       )
    end
 
-   local rock_manifest = manif.load_rock_manifest(name, version)
+   local rock_manifest, err = manif.load_rock_manifest(name, version)
+   if not rock_manifest then return nil, err end
    
    local ok, err = true
    if rock_manifest.bin then
@@ -305,12 +308,10 @@ function repos.delete_version(name, version, deps_mode, quick)
       )
    end
 
-   local rock_manifest = manif.load_rock_manifest(name, version)
-   if not rock_manifest then
-      return nil, "rock_manifest file not found for "..name.." "..version.." - not a LuaRocks 2 tree?"
-   end
+   local rock_manifest, err = manif.load_rock_manifest(name, version)
+   if not rock_manifest then return nil, err end
    
-   local ok, err = true
+   local ok = true
    if rock_manifest.bin then
       ok, err = delete_deployed_file_tree(rock_manifest.bin, cfg.deploy_bin_dir, cfg.wrapper_suffix)
    end
-- 
cgit v1.2.3-55-g6feb