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Add variant of Ref::update_ref() to update with custom Hasher instance

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This commit is contained in:
Matthias Beyer 2016-09-05 14:21:56 +02:00
parent a6ca041903
commit 5399b8ca7b
1 changed files with 7 additions and 3 deletions
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10
libimagref/src/reference.rs
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@ -353,6 +353,12 @@ impl<'a> Ref<'a> {
/// Update the Ref by re-checking the file from FS
/// This errors if the file is not present or cannot be read()
pub fn update_ref(&mut self) -> Result<()> {
self.update_ref_with_hasher(&DefaultHasher::new())
}
/// Update the Ref by re-checking the file from FS using the passed Hasher instance
/// This errors if the file is not present or cannot be read()
pub fn update_ref_with_hasher<H: Hasher>(&mut self, h: &H) -> Result<()> {
let current_hash = try!(self.get_current_hash()); // uses the default hasher
let current_perm = try!(self.get_current_permissions());
@ -363,11 +369,9 @@ impl<'a> Ref<'a> {
.map_err(|e| REK::StoreWriteError.into_error_with_cause(e))
);
let hasher_name = DefaultHasher::new().hash_name();
try!(self.0
.get_header_mut()
.set(&format!("ref.content_hash.{}", hasher_name)[..], Value::String(current_hash))
.set(&format!("ref.content_hash.{}", h.hash_name())[..], Value::String(current_hash))
.map_err(Box::new)
.map_err(|e| REK::StoreWriteError.into_error_with_cause(e))
);