add execute_print_receive_chunks(); add Makefile; add test

.gitignore

@@ -1,2 +1,3 @@
 /.idea
 /test
+/venv

Makefile

@@ -0,0 +1,33 @@
+.ONESHELL:
+SHELL := bash
+# https://github.com/JordanMartinez/purescript-cookbook/blob/master/makefile
+# set -e = bash immediately exits if any command has a non-zero exit status.
+# set -u = a reference to any shell variable you haven't previously
+#    defined -- with the exceptions of $* and $@ -- is an error, and causes
+#    the program to immediately exit with non-zero code.
+# set -o pipefail = the first non-zero exit code emitted in one part of a
+#    pipeline (e.g. `cat file.txt | grep 'foo'`) will be used as the exit
+#    code for the entire pipeline. If all exit codes of a pipeline are zero,
+#    the pipeline will emit an exit code of 0.
+.SHELLFLAGS := -eu -o pipefail -c
+
+.PHONY: all
+all: venv
+
+# Python Dependency Locking with pip-tools
+# https://lincolnloop.com/insights/python-dependency-locking-pip-tools/
+
+.PHONY: test
+test: venv
+	source venv/bin/activate
+	python3 test.py
+
+venv:
+	if [ -d venv ]; then
+	  rm -r venv
+	fi
+	python3 -m venv venv
+
+.PHONY: clean
+clean:
+	rm -rf venv .mypy_cache build dist __pycache__ test

exec_capture.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 import subprocess
 
 

exec_print_capture.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 from queue import Queue
 import sys
 import threading
@@ -17,15 +19,15 @@ class _Assert:
             raise ValueError(f'Expected a and b to be equal: {a}, {b}')
 
 
-def _read_output(pipe: IO[AnyStr], queue_put: Queue.put, list_append: list.append, prefix: str = ''):
+def _read_output(str_pipe: IO[AnyStr], queue_put: Queue.put, list_append: list.append, prefix: str = ''):
     line: str
-    for line in pipe:
+    for line in str_pipe:
         func: Callable[[str], None]
         for func in (queue_put, list_append):
             func(f'{prefix}{line}')
 
     # TODO: Has this any effect?
-    # pipe.close()
+    # str_pipe.close()
 
 
 def _write_output(queue_get: Queue.get):

exec_print_receive.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+import subprocess
+import sys
+import threading
+from pathlib import Path
+from typing import IO, AnyStr
+
+from receive_inform import receive_inform
+
+
+def _print_stdout(bin_pipe: IO[AnyStr]):
+    b: bytes
+    for b in bin_pipe:
+        sys.stdout.write(f'[STDOUT] {b.decode("UTF-8")}')
+
+    # TODO: Has this any effect?
+    # bin_pipe.close()
+
+
+def _print_stderr(bin_pipe: IO[AnyStr]):
+    b: bytes
+    for b in bin_pipe:
+        sys.stderr.write(f'[STDERR] {b.decode("UTF-8")}')
+
+    # TODO: Has this any effect?
+    # bin_pipe.close()
+
+
+def execute_print_receive_chunks(command: list[str],
+                                 socket_file: Path,
+                                 chunk_file_tmpl: Path) -> int:
+    process = subprocess.Popen(
+        command,
+        stdin=subprocess.PIPE,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        close_fds=True,
+    )
+
+    # TODO - This function
+    # - execute the command (print live stdout/stderr)
+    #
+    # TODO - Inside receive_inform()
+    # - while True
+    #   - wait for message at socket_file
+    #   - if 'OK\n'
+    #     - determine chunk filename
+    #     - read chunk, pass to stdin of command
+    #     - delete chunk
+    #   - if 'EOF\n'
+    #     - break
+    #
+    # TODO - This function
+    # - wait for command to finish
+
+    t_out = threading.Thread(
+        target=_print_stdout, args=(process.stdout,))
+    t_err = threading.Thread(
+        target=_print_stderr, args=(process.stderr,))
+
+    for t in (t_out, t_err):
+        t.daemon = True
+        t.start()
+
+    receive_inform(process.stdin, socket_file, chunk_file_tmpl)
+
+    returncode = process.wait()
+    for t in (t_out, t_err):
+        t.join()
+
+    return returncode

exec_print_transfer.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 from pathlib import Path
 import sys
 import threading
@@ -26,20 +28,20 @@ def _save_chunk(chunk: bytes, chunk_file: Path):
         f.write(chunk)
 
 
-def _save_output(pipe: IO[AnyStr], stdout_dir: Path):
+def _save_output(out_pipe: IO[AnyStr], stdout_dir: Path):
     stdout_dir.mkdir(parents=True, exist_ok=False)
 
     b: bytes
     ct: int = 1
-    for b in pipe:
+    for b in out_pipe:
         stdout_dir.joinpath(str(ct)).write_bytes(b)
         ct += 1
 
     # TODO: Has this any effect?
-    # pipe.close()
+    # out_pipe.close()
 
 
-def _save_output_rotating_chunks(pipe: IO[AnyStr], chunk_file_tmpl: Path, chunk_size,
+def _save_output_rotating_chunks(out_pipe: IO[AnyStr], chunk_file_tmpl: Path, chunk_size,
                                  chunk_transfer_fun: Callable, chunk_transfer_args: tuple):
     chunk_file_tmpl.parent.mkdir(parents=True, exist_ok=True)
 
@@ -50,7 +52,7 @@ def _save_output_rotating_chunks(pipe: IO[AnyStr], chunk_file_tmpl: Path, chunk_
         # https://docs.python.org/3/library/io.html#io.RawIOBase.read
         # If 0 bytes are returned, and size was not 0, this indicates end of file.
         # If the object is in non-blocking mode and no bytes are available, None is returned.
-        b = pipe.read(remaining_bytes)
+        b = out_pipe.read(remaining_bytes)
         if len(b) == 0:
             # EOF reached.
             chunk_file = chunk_file_tmpl.parent.joinpath(f'{chunk_file_tmpl.name}.{ct}')
@@ -78,16 +80,16 @@ def _save_output_rotating_chunks(pipe: IO[AnyStr], chunk_file_tmpl: Path, chunk_
             raise ValueError('Invalid state')
 
     # TODO: Has this any effect?
-    # pipe.close()
+    # out_pipe.close()
 
 
-def _print_output(pipe: IO[AnyStr]):
-    line: str
-    for line in pipe:
-        sys.stderr.write(f'[STDERR] {line}')
+def _print_stderr(bin_pipe: IO[AnyStr]):
+    b: bytes
+    for b in bin_pipe:
+        sys.stderr.write(f'[STDERR] {b.decode("UTF-8")}')
 
     # TODO: Has this any effect?
-    # pipe.close()
+    # bin_pipe.close()
 
 
 def execute_print_transfer_chunks(command: list[str],
@@ -130,7 +132,7 @@ def execute_print_transfer_chunks(command: list[str],
         target=_save_output_rotating_chunks,
         args=(process.stdout, chunk_file_tmpl, chunk_size, chunk_transfer_fun, chunk_transfer_args))
     t_err = threading.Thread(
-        target=_print_output, args=(process.stderr,))
+        target=_print_stderr, args=(process.stderr,))
 
     for t in (t_out, t_err):
         t.daemon = True

receive_inform.py

@@ -1,30 +1,22 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 import socket
 from pathlib import Path
+from typing import IO, AnyStr
 
 from unix_sock_input import accept_loop_until_command_received
 
 
-def receive_inform(cmd: list[str], socket_file: Path, chunk_file_tmpl: Path):
+def receive_inform(in_pipe: IO[AnyStr],
+                   socket_file: Path,
+                   chunk_file_tmpl: Path) -> None:
     """
+    :param in_pipe:
     :param chunk_file_tmpl:
     :param cmd:
     :param socket_file: Create a UNIX socket and wait for messages.
     :return:
     """
-
-    # TODO
-    # - execute the command
-
-    # TODO
-    # - while True
-    #   - wait for message at socket_file
-    #   - if 'OK\n'
-    #     - determine chunk filename
-    #     - read chunk, pass to stdin of command
-    #     - delete chunk
-    #   - if 'EOF\n'
-    #     - break
-
     print(f'Listening on socket {socket_file}')
     sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
     sock.bind(str(socket_file))
@@ -34,11 +26,16 @@ def receive_inform(cmd: list[str], socket_file: Path, chunk_file_tmpl: Path):
     commands = [b'OK\n', b'EOF\n']
     while True:
         command = accept_loop_until_command_received(sock, commands)
-        if command == b'OK\n':
+        if command not in commands:
+            raise ValueError("Invalid state")
+
         chunk_file = chunk_file_tmpl.parent.joinpath(f'{chunk_file_tmpl.name}.{ct}')
         chunk = chunk_file.read_bytes()
-            # TODO send chunk to stdin of command
+        in_pipe.write(chunk)
+        # in_pipe.flush()  # TODO: is this required?
         chunk_file.unlink(missing_ok=False)
+
+        if command == b'OK\n':
             ct += 1
         elif command == b'EOF\n':
             break
@@ -49,5 +46,7 @@ def receive_inform(cmd: list[str], socket_file: Path, chunk_file_tmpl: Path):
     sock.close()
     socket_file.unlink(missing_ok=False)
 
-    # TODO
-    # - wait for command to finish
+    in_pipe.flush()
+
+    # TODO: Has this any effect? On stdin probably yes!
+    in_pipe.close()

test.py

@@ -1,9 +1,14 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 import os
+import shlex
 import shutil
+import socket
 from pathlib import Path
 
 from exec_capture import execute_capture
 from exec_print_capture import execute_print_capture
+from exec_print_receive import execute_print_receive_chunks
 from exec_print_transfer import execute_print_transfer_chunks
 from transfer_inform import transfer_inform
 
@@ -13,7 +18,8 @@ def test():
     # test2()
     # test3()
     # test4()
-    test5()
+    # test5()
+    test67()
 
 
 def test1():
@@ -61,7 +67,6 @@ def test5():
     chunk_file_tmpl = Path('test/5')
     source_file = Path('transfer_inform.py')  # A python script file with some content to copy ;)
     remote_target_file = Path(f'test/5-copy-of-{source_file}')
-    ssh_error_file = Path('test/5-ssh-error-while-informing-remote-pc')
     concat_script = Path('test/5-concat')
 
     concat_script.write_text(f'#!/usr/bin/bash\n'
@@ -76,15 +81,14 @@ def test5():
     execute_print_transfer_chunks(
         command=['cat', str(source_file)],
         chunk_file_tmpl=chunk_file_tmpl,
-        chunk_transfer_fun=_chunk_transfer_fun,
-        chunk_transfer_args=(ssh_error_file, concat_script, remote_target_file),
+        chunk_transfer_fun=_test5_chunk_transfer_fun,
+        chunk_transfer_args=(concat_script, remote_target_file),
         chunk_size=512,
     )
 
 
-def _chunk_transfer_fun(chunk_file: Path,
+def _test5_chunk_transfer_fun(chunk_file: Path,
                               eof: bool,
-                        ssh_error_file: Path,
                               concat_script: Path,
                               remote_target_file: Path):
     rsync_cmd = [str(concat_script), str(chunk_file), str(remote_target_file)]
@@ -99,6 +103,65 @@ def _chunk_transfer_fun(chunk_file: Path,
     )
 
 
+def test67():
+    hostname = socket.gethostname()
+    if hostname == 'yodaTux':
+        test6()  # LOCAL
+    elif hostname == 'danctnix':
+        test7()  # REMOTE
+    else:
+        print(f'Unknown hostname {hostname}')
+
+
+def test6():
+    _init(6)
+
+    source_file = Path('transfer_inform.py')  # A python script file with some content to copy ;)
+    chunk_file_tmpl = Path('test/6-transfer_inform.py')
+    ssh_target = 'pine-pwdless'
+    target_file_tmpl = Path(f'/home/alarm/subprocess_util/test/6-transfer_inform.py')
+
+    execute_print_transfer_chunks(
+        command=['cat', str(source_file)],
+        chunk_file_tmpl=chunk_file_tmpl,
+        chunk_transfer_fun=_test6_chunk_transfer_fun,
+        chunk_transfer_args=(chunk_file_tmpl, ssh_target, target_file_tmpl),
+        chunk_size=512,
+    )
+
+
+def _test6_chunk_transfer_fun(source_chunk: Path,
+                              eof: bool,
+                              chunk_file_tmpl: Path,
+                              ssh_target: str,
+                              target_file_tmpl: Path,
+                              ):
+    target_chunk = target_file_tmpl.parent.joinpath(f'{source_chunk.name}')
+    rsync_cmd = ['rsync', str(source_chunk), f'{ssh_target}:{str(target_chunk)}']
+    message = 'EOF' if eof else 'OK'
+    target_socket = target_file_tmpl.parent.joinpath(f'{target_file_tmpl.name}.SOCKET')
+    inform_cmd = ['ssh', ssh_target, f'echo {message} | nc -U {shlex.quote(str(target_socket))}']
+
+    transfer_inform(
+        rsync_cmd=rsync_cmd,
+        inform_cmd=inform_cmd,
+        user_input_file=source_chunk.parent.joinpath(f'{source_chunk.name}.SOCKET'),
+    )
+
+
+def test7():
+    _init(7)
+
+    target_file_tmpl = Path(f'/home/alarm/subprocess_util/test/6-transfer_inform.py')
+    target_socket = target_file_tmpl.parent.joinpath(f'{target_file_tmpl.name}.SOCKET')
+
+    execute_print_receive_chunks(
+        ['tee', str(target_file_tmpl)],
+        target_socket,
+        target_file_tmpl,
+    )
+
+
 def _init(test_number: int):
     print(f"TEST {test_number}")
     test_dir = Path('test')

transfer_inform.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 from pathlib import Path
 
 from exec_print_capture import execute_print_capture

unix_sock_input.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 import socket
 from pathlib import Path