Changes:
1. rename the sandstorm "manage" permission to "edit"
(old permission names: view, add, manage;
new permission names: view, add, edit).
Rationale: "edit" best describes this permission's current powers, to users and to operators.
If we ever added more manager-type features we'd want that to be a new permission,
not a rename of the existing one (which would change the powers of existing users).
2. rename the sandstorm roles for consistency with permissions
(old role names: viewer, editor, manager;
new role names: viewer, adder, editor)
Rationale: it's needed to avoid confusion.
3. add a new option: --allow=view|add|edit|sandstorm (default: add).
'sandstorm' sets permissions according to the X-Sandstorm-Permissions header.
Drop the --capabilities and --capabilities-header options.
Rationale: it's simpler and more intuitive.
4. replace "capability" with "permission" in ui/docs/code.
Rationale: consistent with the above, more familiar.
This increases composability and avoids some ugly case handling. We
re-export runExceptT in Hledger.Read.
The final return types of the following functions has been changed from
IO (Either String a) to ExceptT String IO a. If this causes a problem,
you can get the old behaviour by calling runExceptT on the output:
readJournal, readJournalFiles, readJournalFile
Or, you can use the easy functions readJournal', readJournalFiles', and
readJournalFile', which assume default options and return in the IO
monad.
Renamed: writeValidJournal -> writeJournalTextIfValidAndChanged
Added comments clarifying line ending behaviour of:
add, import, appendToJournalFileOrStdout, readFilePortably,
writeFileWithBackupIfChanged, writeJournalTextIfValidAndChanged
Summary of current behaviour:
- hledger add and import commands will append with (at least some)
unix line endings, possibly causing the file to have mixed line
endings
- hledger-web edit and upload forms will write the file with
the current system's native line endings, ie changing all
line endings if the file previously used foreign line endings.
