From: Tobias Ulmer <tu@emlix.com>
Date: Fri, 6 Dec 2013 17:53:17 +0000 (+0100)
Subject: hash: Add hash_file_once() which does all the hash context work
X-Git-Tag: e2factory-2.3.15rc1~289
X-Git-Url: https://git.e2factory.org/?a=commitdiff_plain;h=5e5e1cfb0bbec60c4b886bb37796d9caa2f41878;p=e2factory.git

hash: Add hash_file_once() which does all the hash context work

Signed-off-by: Tobias Ulmer <tu@emlix.com>
---

diff --git a/generic/hash.lua b/generic/hash.lua
index 8a119b8..5172f1b 100644
--- a/generic/hash.lua
+++ b/generic/hash.lua
@@ -127,6 +127,27 @@ function hash.hash_file(hc, path)
     return true
 end
 
+--- Hash a file at once.
+-- @param path Full path to the file.
+-- @return Checksum string, or false on error.
+-- @return Error object on failure.
+function hash.hash_file_once(path)
+    local rc, re, hc, cs
+
+    hc, re = hash.hash_start()
+    if not hc then
+        return false, re
+    end
+
+    rc, re = hash.hash_file(hc, path)
+    if not rc then
+        hash.hash_finish(hc)
+        return false, re
+    end
+
+    return hash.hash_finish(hc)
+end
+
 --- Get checksum and release hash context.
 -- @param hc the hash context
 -- @return SHA1 Checksum, or false on error.