testsuite: test install-strip tool selection

testsuite/install-strip_test.py

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+
+import filecmp
+import os
+import re
+import shlex
+import shutil
+import subprocess
+
+from rsyncfns import SCRATCHDIR, SRCDIR, TOOLDIR, test_fail
+
+
+make_vars = {}
+for line in (TOOLDIR / 'Makefile').read_text().splitlines():
+    name, separator, value = line.partition('=')
+    if separator and name in ('prefix', 'exec_prefix', 'bindir',
+                              'EXEEXT', 'STRIP'):
+        make_vars[name] = value.strip()
+
+if not make_vars.get('STRIP'):
+    test_fail('configured Makefile does not define STRIP')
+
+source_rsync = TOOLDIR / f"rsync{make_vars.get('EXEEXT', '')}"
+if not source_rsync.is_file():
+    test_fail('cannot find the built rsync binary')
+
+builddir = SCRATCHDIR / 'build'
+builddir.mkdir()
+makefile_text = (TOOLDIR / 'Makefile').read_text()
+if 'install: all\n' not in makefile_text:
+    test_fail('cannot isolate the install target from the shared build')
+if 'Makefile: Makefile.in config.status configure.sh config.h.in\n' not in makefile_text:
+    test_fail('cannot isolate Makefile regeneration from the shared build')
+(builddir / 'Makefile').write_text(
+    makefile_text
+    .replace('install: all\n', 'install:\n', 1)
+    .replace('Makefile: Makefile.in config.status configure.sh config.h.in\n',
+             'Makefile:\n', 1)
+)
+
+for name in (source_rsync.name, 'install-sh', 'rsync-ssl', 'rrsync', 'rsync.1',
+             'rsync-ssl.1', 'rsyncd.conf.5', 'rrsync.1'):
+    source = TOOLDIR / name
+    if not source.is_file():
+        source = SRCDIR / name
+    if source.is_file():
+        shutil.copy2(source, builddir / name)
+
+
+def expand_make_value(value):
+    for _ in range(10):
+        expanded = re.sub(
+            r'\$\{([^}]+)\}|\$\(([^)]+)\)',
+            lambda match: make_vars.get(match.group(1) or match.group(2),
+                                        match.group(0)),
+            value,
+        )
+        if expanded == value:
+            return expanded
+        value = expanded
+    test_fail(f'cannot expand Makefile value {value!r}')
+
+
+bindir = expand_make_value(make_vars.get('bindir', ''))
+if not bindir or '$' in bindir:
+    test_fail(f'cannot determine configured bindir from {bindir!r}')
+
+make = shlex.split(os.environ.get('MAKE', 'make'))
+tools = SCRATCHDIR / 'tools'
+tools.mkdir()
+
+for strip_name in ('strip', 'aarch64-linux-gnu-strip'):
+    destdir = SCRATCHDIR / 'roots' / strip_name
+    strip_log = SCRATCHDIR / f'{strip_name}.log'
+    strip = tools / strip_name
+    strip.write_text('#!/bin/sh\nprintf \'%s\\n\' "$@" >"$STRIP_LOG"\n')
+    strip.chmod(0o755)
+
+    env = os.environ.copy()
+    env['STRIP_LOG'] = str(strip_log)
+    proc = subprocess.run(
+        [*make, f'DESTDIR={destdir}', f'STRIP={strip}', 'install-strip'],
+        cwd=builddir, env=env, capture_output=True, text=True,
+    )
+    if proc.returncode != 0:
+        test_fail(f'install-strip failed with {strip_name}:\n'
+                  f'{proc.stdout}{proc.stderr}')
+
+    installed = destdir / bindir.lstrip('/') / source_rsync.name
+    if not installed.is_file():
+        test_fail(f'install-strip did not install {installed}')
+    if not strip_log.is_file():
+        test_fail(f'install-strip did not call {strip_name}')
+    if strip_log.read_text().splitlines() != [str(installed)]:
+        test_fail(f'{strip_name} was not called with {installed}')
+    if not filecmp.cmp(source_rsync, installed, shallow=False):
+        test_fail(f'{strip_name} unexpectedly changed the installed test binary')