add find_program and impl find_ccache

2 files changed, 129 insertions, 11 deletions

diff --git a/xmake/core/sandbox/modules/import/lib/detect/find_program.lua b/xmake/core/sandbox/modules/import/lib/detect/find_program.lua
new file mode 100644
index 000000000..2399c717b
--- /dev/null
+++ b/xmake/core/sandbox/modules/import/lib/detect/find_program.lua
@@ -0,0 +1,124 @@
+--!The Make-like Build Utility based on Lua
+--
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements.  See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership.  The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License.  You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015 - 2017, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        find_program.lua
+--
+
+-- define module
+local sandbox_lib_detect_find_program = sandbox_lib_detect_find_program or {}
+
+-- load modules
+local os        = require("base/os")
+local path      = require("base/path")
+local table     = require("base/table")
+local utils     = require("base/utils")
+local option    = require("base/option")
+local sandbox   = require("sandbox/sandbox")
+local raise     = require("sandbox/modules/raise")
+
+-- the cache info
+local cacheinfo = cacheinfo or {}
+
+-- check program
+function sandbox_lib_detect_find_program._check(program, check)
+
+    -- no check script? attempt to run it directly
+    if not check then
+        return 0 == os.exec(shellname, xmake._NULDEV, xmake._NULDEV)
+    end
+
+    -- check it
+    local ok, errors = sandbox.load(check, program) 
+    if not ok then
+        utils.verror(errors)
+    end
+
+    -- ok?
+    return ok
+end
+
+-- find program
+function sandbox_lib_detect_find_program._find(name, dirs, check)
+
+    -- attempt to check it directly in current environment 
+    if sandbox_lib_detect_find_program._check(name, check) then
+        return name
+    end
+
+    -- attempt to check it from the given directories
+    if not path.is_absolute(name) then
+        for _, dir in ipairs(table.wrap(dirs)) do
+
+            -- TODO
+            -- dir is registry path?
+
+            -- the program path
+            local program_path = path.join(dir, name)
+            if os.isexec(program_path) then
+            
+                -- check it
+                if sandbox_lib_detect_find_program._check(program_path, check) then
+                    return program_path
+                end
+            end
+        end
+    end
+end
+
+-- find program
+--
+-- @param name  the program name
+-- @param dirs  the program directories
+-- @param check the check script 
+--
+-- @return      the program name or path
+--
+function sandbox_lib_detect_find_program.main(name, dirs, check)
+ 
+    -- attempt to get result from cache first
+    local result = cacheinfo[name]
+    if result then
+        return result
+    end
+
+    -- find executable program
+    result = sandbox_lib_detect_find_program._find(name, dirs, check) 
+
+    -- cache result
+    if result then
+        cacheinfo[name] = result
+    end
+
+    -- trace
+    if option.get("verbose") then
+        if result then
+            utils.cprint("checking for the %s ... ${green}%s", name, result)
+        else
+            utils.cprint("checking for the %s ... ${red}no", name)
+        end
+    end
+
+    -- ok?
+    return result
+end
+
+-- return module
+return sandbox_lib_detect_find_program
diff --git a/xmake/modules/lib/detect/find_ccache.lua b/xmake/modules/lib/detect/find_ccache.lua
index 66338da2a..b90856c19 100644
--- a/xmake/modules/lib/detect/find_ccache.lua
+++ b/xmake/modules/lib/detect/find_ccache.lua
@@ -23,17 +23,11 @@
 --
 
 -- imports
-import("lib.detect.find_file")
+import("lib.detect.find_program")
 
 -- find ccache 
---
--- @param ...   detected dirs, files, regs
---
--- @return      {shellname = ... , fullpath = ...} or nil
---
-function main(...)
-
-    -- TODO
-    print("ccache")
-    find_file()
+function main()
+    return find_program("ccache", { "/usr/bin",
+                                    "/usr/local/bin"}
+                                , function (program) os.run("%s -h", program) end)
 end