Merge pull request #7268 from luadebug/nim-increment

add dependency file generation for Nim source files

1 files changed, 42 insertions, 0 deletions

diff --git a/xmake/rules/nim/build/target.lua b/xmake/rules/nim/build/target.lua
index 7db19a559..52599b74d 100644
--- a/xmake/rules/nim/build/target.lua
+++ b/xmake/rules/nim/build/target.lua
@@ -25,6 +25,45 @@ import("core.tool.compiler")
 import("core.project.depend")
 import("utils.progress")
 
+-- generate dependency info
+function _generate_dependinfo(compinst, compflags, sourcefiles, dependinfo)
+
+    -- generate dependency file (.deps)
+    local flags = {}
+    local nimcache
+    for _, flag in ipairs(compflags) do
+        table.insert(flags, flag)
+        if flag:startswith("--nimcache:") then
+            nimcache = flag:sub(12)
+        end
+    end
+    table.insert(flags, "--genScript")
+
+    -- run nim --genScript to generate .deps file
+    local program = compinst:program()
+    local argv = table.join("c", flags, sourcefiles)
+    os.runv(program, argv, {envs = compinst:runenvs()})
+
+    -- parse .deps file
+    if nimcache then
+        for _, sourcefile in ipairs(sourcefiles) do
+            local filename = path.basename(sourcefile)
+            local depsfile = path.join(nimcache, filename .. ".deps")
+            if os.isfile(depsfile) then
+                local depsdata = io.readfile(depsfile)
+                if depsdata then
+                    for _, line in ipairs(depsdata:split("\n")) do
+                        line = line:trim()
+                        if #line > 0 then
+                            table.insert(dependinfo.files, line)
+                        end
+                    end
+                end
+            end
+        end
+    end
+end
+
 -- build the source files
 function build_sourcefiles(target, sourcebatch, opt)
 
@@ -66,6 +105,9 @@ function build_sourcefiles(target, sourcebatch, opt)
     dependinfo.files = {}
     assert(compinst:build(sourcefiles, targetfile, {target = target, dependinfo = dependinfo, compflags = compflags}))
 
+    -- generate dependency file (.deps)
+    _generate_dependinfo(compinst, compflags, sourcefiles, dependinfo)
+
     -- update files and values to the dependent file
     dependinfo.values = depvalues
     table.join2(dependinfo.files, sourcefiles)