devtools: add go-dirhash-native for Go module hash calculation

Add a native recipe that builds the Go dirhash tool for calculating
h1: hashes on module zip files. This is used as a fallback when the
pure Python implementation cannot be used.

The tool implements the Go module hash algorithm per the Go modules
reference specification.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

2 files changed, 50 insertions, 0 deletions

diff --git a/recipes-devtools/go-dirhash-native/go-dirhash/LICENSE b/recipes-devtools/go-dirhash-native/go-dirhash/LICENSE
new file mode 100644
index 00000000..9feb7621
--- /dev/null
+++ b/recipes-devtools/go-dirhash-native/go-dirhash/LICENSE
@@ -0,0 +1,26 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+   * Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+   * Neither the name of Google Inc. nor the names of its
+     contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/recipes-devtools/go-dirhash-native/go-dirhash/dirhash-helper.go b/recipes-devtools/go-dirhash-native/go-dirhash/dirhash-helper.go
new file mode 100644
index 00000000..d2aec41c
--- /dev/null
+++ b/recipes-devtools/go-dirhash-native/go-dirhash/dirhash-helper.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+    "fmt"
+    "os"
+
+    "golang.org/x/mod/sumdb/dirhash"
+)
+
+func main() {
+    if len(os.Args) != 2 {
+        fmt.Fprintf(os.Stderr, "Usage: %s <zip-file>\n", os.Args[0])
+        os.Exit(1)
+    }
+
+    zipPath := os.Args[1]
+    hash, err := dirhash.HashZip(zipPath, dirhash.DefaultHash)
+    if err != nil {
+        fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+        os.Exit(1)
+    }
+
+    fmt.Println(hash)
+}