/** Creates a TarStreamBuilder using TarArchiveEntries. */
private void SetUpWithTarEntries()
{
// Prepares a test TarStreamBuilder.
testTarStreamBuilder.AddTarArchiveEntry(TarStreamBuilder.CreateEntryFromFile(fileA.ToFile(), "some/path/to/resourceFileA"));
testTarStreamBuilder.AddTarArchiveEntry(TarStreamBuilder.CreateEntryFromFile(fileB.ToFile(), "crepecake"));
testTarStreamBuilder.AddTarArchiveEntry(
TarStreamBuilder.CreateEntryFromFile(directoryA.ToFile(), "some/path/to/"));
testTarStreamBuilder.AddTarArchiveEntry(
TarStreamBuilder.CreateEntryFromFile(
fileA.ToFile(),
"some/really/long/path/that/exceeds/100/characters/abcdefghijklmnopqrstuvwxyz0123456789012345678901234567890"));
}
/**
* Retrieves the layer digest selected by the {@code selector}.
*
* @param selector the selector
* @return the layer digest {@code selector} selects, if found
* @throws CacheCorruptedException if the selector file contents was not a valid layer digest
* @throws IOException if an I/O exception occurs
*/
public Maybe <DescriptorDigest> Select(DescriptorDigest selector)
{
selector = selector ?? throw new ArgumentNullException(nameof(selector));
SystemPath selectorFile = cacheStorageFiles.GetSelectorFile(selector);
if (!Files.Exists(selectorFile))
{
return(Maybe.Empty <DescriptorDigest>());
}
string selectorFileContents =
File.ReadAllText(selectorFile.ToFile().FullName, Encoding.UTF8);
try
{
return(Maybe.Of(DescriptorDigest.FromHash(selectorFileContents)));
}
catch (DigestException)
{
throw new CacheCorruptedException(
cacheStorageFiles.GetCacheDirectory(),
"Expected valid layer digest as contents of selector file `"
+ selectorFile
+ "` for selector `"
+ selector.GetHash()
+ "`, but got: "
+ selectorFileContents);
}
}
/**
* Deserializes a JSON file via a JSON object template.
*
* @param <T> child type of {@link JsonTemplate}
* @param jsonFile a file containing a JSON string
* @param templateClass the template to deserialize the string to
* @return the template filled with the values parsed from {@code jsonFile}
* @throws IOException if an error occurred during reading the file or parsing the JSON
*/
public static T ReadJsonFromFile <T>(SystemPath jsonFile)
{
jsonFile = jsonFile ?? throw new ArgumentNullException(nameof(jsonFile));
using (StreamReader reader = jsonFile.ToFile().OpenText())
{
return(JsonConvert.DeserializeObject <T>(reader.ReadToEnd()));
}
}