add fallback checks for gzip and tar detection

2 files changed, 24 insertions, 0 deletions

diff --git a/xmake/modules/detect/tools/find_gzip.lua b/xmake/modules/detect/tools/find_gzip.lua
index ea0b97408..a3e456673 100644
--- a/xmake/modules/detect/tools/find_gzip.lua
+++ b/xmake/modules/detect/tools/find_gzip.lua
@@ -40,6 +40,18 @@ function main(opt)
     -- init options
     opt = opt or {}
 
+    opt.check = opt.check or function (program)
+        local ok = try { function () os.runv(program, {"--version"}, {envs = opt.envs, shell = opt.shell}) end }
+        if not ok then
+            -- some gzip do not support `--version`, so we fall back to compressing a temporary file to check it
+            local tmpfile = os.tmpfile()
+            io.writefile(tmpfile, "")
+            os.runv(program, {"-f", tmpfile}, {envs = opt.envs, shell = opt.shell})
+            os.rm(tmpfile .. ".gz")
+            os.rm(tmpfile)
+        end
+    end
+
     -- find program
     local program = find_program(opt.program or "gzip", opt)
 
diff --git a/xmake/modules/detect/tools/find_tar.lua b/xmake/modules/detect/tools/find_tar.lua
index e4c3f7d4f..37d69777a 100644
--- a/xmake/modules/detect/tools/find_tar.lua
+++ b/xmake/modules/detect/tools/find_tar.lua
@@ -40,6 +40,18 @@ function main(opt)
     -- init options
     opt = opt or {}
 
+    opt.check = opt.check or function (program)
+        local ok = try { function () os.runv(program, {"--version"}, {envs = opt.envs, shell = opt.shell}) end }
+        if not ok then
+            -- some tar do not support `--version`, so we fall back to creating a temporary archive to check it
+            local tmpdir = os.tmpfile() .. ".dir"
+            os.mkdir(tmpdir)
+            io.writefile(path.join(tmpdir, "test.txt"), "")
+            os.runv(program, {"-cf", "test.tar", "test.txt"}, {curdir = tmpdir, envs = opt.envs, shell = opt.shell})
+            os.rm(tmpdir)
+        end
+    end
+
     -- find program
     local program = find_program(opt.program or "tar", opt)