Add a CopyContext class. At this point it mostly acts as a context
manager for two FileContext instances, and copying data is the
canonical case to use it, hence the name.
Signed-off-by: Jan Lindemann <jan@janware.com>
- Add optional in_pipe and out_pipe parameters to __init__()
- Add a add_proc_filter() method
Add possibilites to attach input / output pipes to a FileContext
instance. Data will be passed through the input pipe between ._get()
and .get(), and through the output pipe between .put() and _put().
Signed-off-by: Jan Lindemann <jan@janware.com>
Add an async open() method which should allow to do what __init__()
couldn't, because it's not async, and to match the already existing
.close(). It's called by __aenter__() __aexit__() if the FileContext
is instantiated as context manager, or at will when the user finds it
a good idea.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add .mkdir() to the API which should do the expected, and implement
it in ExecContext and Local specializations.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a bool parameter "chroot" to __init__(). If passed, all
path-centric operations act as if .root was prepended to it.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a .root property, returning the path part of the instantiating
URI. Nothing meaningful beyond returning it is done with it so far.
Signed-off-by: Jan Lindemann <jan@janware.com>
Each wrapper method throws a NotImplementedError by default. Make
that error a little more descriptive in case it really gets thrown.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add .schema_from_uri(), .split_uri(), .id() to define some
standardish way to dissect an URI the same way FileContext does.
Signed-off-by: Jan Lindemann <jan@janware.com>
Code beautification: __init__() doesn't use the arguments it grabs by
name from its parameter list, use *args and **kwargs instead.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a ProcFilter implementation for decrypting GPG blobs. It needs an
ExecContext passed to __init__() in order to run /usr/bin/gpg.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add the ProcFilter module, containing the following classes:
- ProcFilter:
Abstract base class defining a run(data: bytes) -> Result method,
allowing to do arbitrary data manipulation in subclasses.
- ProcFilterIdenty
A ProcFilter specialization which passes through the input
unchanged.
- ProcPipeline
A container for multiple chained ProcFilter classes
Signed-off-by: Jan Lindemann <jan@janware.com>
Cosmetics: The "packages" parameter to some DistroContext's methods
has a confusing name in same contexts, notably when mixed with a list
of Package instances, so rename it to "pkg_names".
Signed-off-by: Jan Lindemann <jan@janware.com>
Add an optional "filter: PackageFilter|None" parameter to .select(),
and if it's not None, call a new version of ._select() with it.
._select() is not abstract anylonger. Its default implementation
filters the results of ._select_by_name(), can be reimplemented by
deriving classes for better performance, but doesn't have to.
Signed-off-by: Jan Lindemann <jan@janware.com>
Rename ._select() to _select_by_name() in Distro and its subclasses.
Don't rename .select() itself, because it's going to be a broader
interface supporting more select criteria than just package names.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add global --pkg-filter argument, defaulting to
JW_DEFAULT_PKG_FILTER. If it's specified, instantiate a
PackageFilterString from it, and initialize App's Distro instance
with it.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a default_pkg_filter parameter to Distro's constructor defaulting
to None, and expose it via the .default_pkg_filter property. As of
this commit, no code in jw-pkg does anything meaningful with it.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add a package filter abstraction designed to replace the package
filter string tossed around various functions througout jw-pkg.
Signed-off-by: Jan Lindemann <jan@janware.com>
- Remove _run_on_conn() because it doesn't add any value
- Add verbose try-except block around connect()
- Add try-except block around failing close
- Prefix private member variables with "__"
Signed-off-by: Jan Lindemann <jan@janware.com>
Commit a19679fec reverted the first attempt to make AsyncSSH reuse
one connection during an instance lifetime. That failed because a lot
of distribution-specific properties were filled in a new event loop
thread started by AsyncRunner, and AsyncSSH didn't like that.
The last commit provided the needed properties as members of the
Distro class. This commit is the second part of the solution: Keep
one connection around as a class member and reuse it on every _run()
invocation.
Signed-off-by: Jan Lindemann <jan@janware.com>
Commit a19679fec reverted the first attempt to make AsyncSSH reuse
one connection during an instance lifetime. That failed because a lot
of distribution-specific properties were filled in a new event loop
thread started by AsyncRunner, and AsyncSSH didn't like that.
This commit is the first part of the solution: Move those properties
from the App class to the Distro class, and load the Distro class
in an async loader. As soon as it's instantiated, it can provide all
its properties without cluttering the code with async keywords.
Signed-off-by: Jan Lindemann <jan@janware.com>
Apply some style changes:
- Replace double by single quotes for consistency
- Add spaces around equal signs in long parameter lists
Signed-off-by: Jan Lindemann <jan@janware.com>
The name of the env parameter to ExecContext.run() and .sudo() is not
descriptive enough for which environment is supposed to be modified
and how, so rename and split it up as follows:
- .run(): env -> mod_env
- .sudo(): env -> mod_env_sudo and mod_env_cmd
The parameters have the following meaning:
- "mod_env*" means that the environment is modified, not replaced
- "mod_env" and "mod_env_cmd" modify the environment "cmd" runs in
- "mod_env_sudo" modifies the environment sudo runs in
Fix the fallout of the API change all over jw-pkg.
Signed-off-by: Jan Lindemann <jan@janware.com>
Add the property .username, backed by the protected _username()
callback. It should return the user run()'s cmd parameter is executed
as.
Signed-off-by: Jan Lindemann <jan@janware.com>
