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Merge pull request #697 from matthiasbeyer/libimagref/hasher-name-in-hdr 

libimagref/hasher name in hdr
This commit is contained in:
Matthias Beyer 2016-09-05 20:30:21 +02:00 committed by GitHub
parent 56576c16bb 55846168dc
commit b1765fa994
1 changed files with 25 additions and 9 deletions
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34
libimagref/src/reference.rs
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@ -168,13 +168,17 @@ impl<'a> Ref<'a> {
};
for tpl in [
Some(("ref", Value::Table(BTreeMap::new()))),
Some(("ref.permissions", Value::Table(BTreeMap::new()))),
Some((String::from("ref"), Value::Table(BTreeMap::new()))),
Some((String::from("ref.permissions"), Value::Table(BTreeMap::new()))),
Some((String::from("ref.path"), Value::String(canonical_path))),
Some((String::from("ref.content_hash"), Value::Table(BTreeMap::new()))),
Some(("ref.path", Value::String(canonical_path))),
content_hash.map(|h| ("ref.content_hash", Value::String(h))),
permissions.map(|p| ("ref.permissions.ro", Value::Boolean(p.readonly()))),
content_hash.map(|hash| {
(format!("ref.content_hash.{}", h.hash_name()), Value::String(hash))
}),
permissions.map(|p| {
(String::from("ref.permissions.ro"), Value::Boolean(p.readonly()))
}),
].into_iter()
{
match tpl {
@ -235,7 +239,13 @@ impl<'a> Ref<'a> {
/// Get the hash of the link target which is stored in the ref object
pub fn get_stored_hash(&self) -> Result<String> {
match self.0.get_header().read("ref.content_hash") {
self.get_stored_hash_with_hasher(&DefaultHasher::new())
}
/// Get the hahs of the link target which is stored in the ref object, which is hashed with a
/// custom Hasher instance.
pub fn get_stored_hash_with_hasher<H: Hasher>(&self, h: &H) -> Result<String> {
match self.0.get_header().read(&format!("ref.content_hash.{}", h.hash_name())[..]) {
// content hash stored...
Ok(Some(Value::String(s))) => Ok(s),
@ -348,7 +358,13 @@ 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<()> {
let current_hash = try!(self.get_current_hash());
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());
try!(self.0
@ -360,7 +376,7 @@ impl<'a> Ref<'a> {
try!(self.0
.get_header_mut()
.set("ref.content_hash", 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))
);