feat: support per library ignoreDir when library path prefix matched

Author: tomlau10

changelog.md

@@ -2,6 +2,16 @@
 
 ## Unreleased
 <!-- Add all new changes here. They will be moved under a version at release -->
+* `NEW` Support per library settings in ignoreDir
+```jsonc
+{
+  "workspace.library": [ "/path/to/lib", "/path/to/lib2" ],
+  "workspace.ignoreDir": [
+    "/path/to/lib/**/lib-ignore", // extracted pattern will be "/**/lib-ignore" and only applies to "/path/to/lib"
+    "global-ignore" // this will still apply to all of "/path/to/lib", "/path/to/lib2", current workspace
+  ]
+}
+```
 
 ## 3.15.0
 `2025-6-25`

script/workspace/workspace.lua

@@ -216,9 +216,32 @@ function m.getLibraryMatchers(scp)
             pattern[#pattern+1] = path
         end
     end
+    local libPatterns = {}
     for _, path in ipairs(config.get(scp.uri, 'Lua.workspace.ignoreDir')) do
         log.debug('Ignore directory:', path)
-        pattern[#pattern+1] = path
+        -- check for library specific ignoreDir
+        local isLibPattern = false
+        local nPath = files.normalize(path)
+        for _, libPath in ipairs(config.get(scp.uri, 'Lua.workspace.library')) do
+            -- check if ignoreDir path is relative to libPath
+            local nLibPath = files.normalize(libPath)
+            local libRelativePath = fs.relative(fs.path(nPath), fs.path(nLibPath)):string()
+            if libRelativePath ~= ''   -- will be empty string on windows if drive letter is different
+            and libRelativePath:sub(1, 2) ~= '..'  -- a valid subpath of libPath should not starts with `..`
+            then
+                isLibPattern = true
+                local absLibPath = m.getAbsolutePath(scp.uri, libPath)
+                if absLibPath then
+                    -- add leading `/` to convert subpath to absolute gitignore pattern path
+                    local subPattern = '/' .. libRelativePath
+                    libPatterns[absLibPath] = libPatterns[absLibPath] or {}
+                    table.insert(libPatterns[absLibPath], subPattern)
+                end
+            end
+        end
+        if not isLibPattern then
+            pattern[#pattern+1] = path
+        end
     end
 
     local librarys = {}
@@ -239,8 +262,16 @@ function m.getLibraryMatchers(scp)
     local matchers = {}
     for path in pairs(librarys) do
         if fs.exists(fs.path(path)) then
+            local patterns = libPatterns[path]
+            if patterns then
+                -- append default pattern
+                util.arrayMerge(patterns, pattern)
+            else
+                -- use default pattern
+                patterns = pattern
+            end
             local nPath = fs.absolute(fs.path(path)):string()
-            local matcher = glob.gitignore(pattern, {
+            local matcher = glob.gitignore(patterns, {
                 root       = path,
                 ignoreCase = platform.os == 'windows',
             }, globInteferFace)