add diagnosis.check_build_deps policy

2 files changed, 29 insertions, 1 deletions

diff --git a/xmake/core/project/policy.lua b/xmake/core/project/policy.lua
index 02a6132df..aa8e9ef9d 100644
--- a/xmake/core/project/policy.lua
+++ b/xmake/core/project/policy.lua
@@ -118,7 +118,9 @@ function policy.policies()
             -- Stop to test on the first failure
             ["test.stop_on_first_failure"]        = {description = "Stop to test on the first failure", default = false, type = "boolean"},
             -- Return zero as exit code on failure
-            ["test.return_zero_on_failure"]       = {description = "Return zero as the exit code on failure", default = false, type = "boolean"}
+            ["test.return_zero_on_failure"]       = {description = "Return zero as the exit code on failure", default = false, type = "boolean"},
+            -- Show diagnosis info for checking build dependencies
+            ["diagnosis.check_build_deps"]        = {description = "Show diagnosis info for checking build dependencies", default = false, type = "boolean"}
         }
         policy._POLICIES = policies
     end
diff --git a/xmake/modules/core/project/depend.lua b/xmake/modules/core/project/depend.lua
index 5e96c7b2a..1e9bee660 100644
--- a/xmake/modules/core/project/depend.lua
+++ b/xmake/modules/core/project/depend.lua
@@ -68,6 +68,20 @@ function load(dependfile, opt)
     end
 end
 
+-- show diagnosis info?
+function _is_show_diagnosis_info()
+    local show = _g.is_show_diagnosis_info
+    if show == nil then
+        if option.get("diagnosis") and project.policy("diagnosis.check_build_deps") then
+            show = true
+        else
+            show = false
+        end
+        _g.is_show_diagnosis_info = show
+    end
+    return show
+end
+
 -- save dependent info to file
 function save(dependinfo, dependfile)
     io.save(dependfile, dependinfo)
@@ -100,6 +114,9 @@ function is_changed(dependinfo, opt)
 
         -- source and header files have been changed or not exists?
         if mtime == 0 or mtime > lastmtime then
+            if _is_show_diagnosis_info() then
+                cprint("${color.warning}depend file %s is changed, mtime: %s, lastmtime: %s", file, mtime, lastmtime)
+            end
             return true
         end
     end
@@ -117,10 +134,16 @@ function is_changed(dependinfo, opt)
         if deptype ~= opttype then
             return true
         elseif deptype == "string" and depvalue ~= optvalue then
+            if _is_show_diagnosis_info() then
+                cprint("${color.warning}depend value %s != %s", depvalue, optvalue)
+            end
             return true
         elseif deptype == "table" then
             for subidx, subvalue in ipairs(depvalue) do
                 if subvalue ~= optvalue[subidx] then
+                    if _is_show_diagnosis_info() then
+                        cprint("${color.warning}depend value %s != %s at index %d", subvalue, optvalue[subidx], subidx)
+                    end
                     return true
                 end
             end
@@ -135,6 +158,9 @@ function is_changed(dependinfo, opt)
         end
         for idx, file in ipairs(files) do
             if file ~= optfiles[idx] then
+                if _is_show_diagnosis_info() then
+                    cprint("${color.warning}depend file %s != %s at index %d", file, optfiles[subidx], idx)
+                end
                 return true
             end
         end