[RFC PATCH 6/9] scripts: remove sys.path hacks for qemu/qemu.qmp

[John Snow]

qemu.qmp can be found via the package index now. Direct the user to just
install the package. When utilities from 'qemu' are needed, direct the
user to install the package from that directory instead, which will pull
in the 'qemu.qmp' package as a dependency.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 scripts/device-crash-test              | 11 ++++++++---
 scripts/render_block_graph.py          | 13 ++++++++++---
 scripts/simplebench/bench_block_job.py | 11 ++++++++---
 3 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/scripts/device-crash-test b/scripts/device-crash-test
index 4bfc68c008..5d21b6dfb1 100755
--- a/scripts/device-crash-test
+++ b/scripts/device-crash-test
@@ -34,9 +34,14 @@ import random
 import argparse
 from itertools import chain
 
-sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'python'))
-from qemu.machine import QEMUMachine
-from qemu.qmp import ConnectError
+try:
+    from qemu.machine import QEMUMachine
+    from qemu.qmp import ConnectError
+except ModuleNotFoundError:
+    target = os.path.realpath(__file__ + '/../../python')
+    print("script dependencies not found.")
+    print(f'try: pushd "{target}" && pip3 install [--user] . && popd')
+    sys.exit(1)
 
 logger = logging.getLogger('device-crash-test')
 dbg = logger.debug
diff --git a/scripts/render_block_graph.py b/scripts/render_block_graph.py
index 26f43fef27..e7b89314ff 100755
--- a/scripts/render_block_graph.py
+++ b/scripts/render_block_graph.py
@@ -24,9 +24,16 @@
 import json
 from graphviz import Digraph
 
-sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'python'))
-from qemu.qmp import QMPError
-from qemu.qmp.legacy import QEMUMonitorProtocol
+try:
+    from qemu.qmp import QMPError
+    from qemu.qmp.legacy import QEMUMonitorProtocol
+except ModuleNotFoundError:
+    print(
+        "qemu.qmp python package not found.",
+        "try: pip3 install [--user] qemu.qmp",
+        sep='\n', file=sys.stderr
+    )
+    sys.exit(1)
 
 
 def perm(arr):
diff --git a/scripts/simplebench/bench_block_job.py 
b/scripts/simplebench/bench_block_job.py
index 56191db44b..ccb2f9ded1 100755
--- a/scripts/simplebench/bench_block_job.py
+++ b/scripts/simplebench/bench_block_job.py
@@ -25,9 +25,14 @@
 import socket
 import json
 
-sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
-from qemu.machine import QEMUMachine
-from qemu.qmp import ConnectError
+try:
+    from qemu.machine import QEMUMachine
+    from qemu.qmp import ConnectError
+except ModuleNotFoundError:
+    target = os.path.realpath(__file__ + '/../../../python')
+    print("script dependencies not found.")
+    print(f'try: pushd "{target}" && pip3 install [--user] . && popd')
+    sys.exit(1)
 
 
 def bench_block_job(cmd, cmd_args, qemu_args):
-- 
2.31.1