[llvm] r372051 - Revert r372035: "[lit] Make internal diff work in pipelines"
Joel E. Denny via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 16 16:47:46 PDT 2019
Author: jdenny
Date: Mon Sep 16 16:47:46 2019
New Revision: 372051
URL: http://llvm.org/viewvc/llvm-project?rev=372051&view=rev
Log:
Revert r372035: "[lit] Make internal diff work in pipelines"
This breaks a Windows bot.
Added:
llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-error-0.txt
Removed:
llvm/trunk/utils/lit/lit/builtin_commands/diff.py
llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-pipes.txt
Modified:
llvm/trunk/utils/lit/lit/TestRunner.py
llvm/trunk/utils/lit/tests/shtest-shell.py
Modified: llvm/trunk/utils/lit/lit/TestRunner.py
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/lit/TestRunner.py?rev=372051&r1=372050&r2=372051&view=diff
==============================================================================
--- llvm/trunk/utils/lit/lit/TestRunner.py (original)
+++ llvm/trunk/utils/lit/lit/TestRunner.py Mon Sep 16 16:47:46 2019
@@ -1,5 +1,7 @@
from __future__ import absolute_import
+import difflib
import errno
+import functools
import io
import itertools
import getopt
@@ -359,6 +361,218 @@ def executeBuiltinMkdir(cmd, cmd_shenv):
exitCode = 1
return ShellCommandResult(cmd, "", stderr.getvalue(), exitCode, False)
+def executeBuiltinDiff(cmd, cmd_shenv):
+ """executeBuiltinDiff - Compare files line by line."""
+ args = expand_glob_expressions(cmd.args, cmd_shenv.cwd)[1:]
+ try:
+ opts, args = getopt.gnu_getopt(args, "wbur", ["strip-trailing-cr"])
+ except getopt.GetoptError as err:
+ raise InternalShellError(cmd, "Unsupported: 'diff': %s" % str(err))
+
+ filelines, filepaths, dir_trees = ([] for i in range(3))
+ ignore_all_space = False
+ ignore_space_change = False
+ unified_diff = False
+ recursive_diff = False
+ strip_trailing_cr = False
+ for o, a in opts:
+ if o == "-w":
+ ignore_all_space = True
+ elif o == "-b":
+ ignore_space_change = True
+ elif o == "-u":
+ unified_diff = True
+ elif o == "-r":
+ recursive_diff = True
+ elif o == "--strip-trailing-cr":
+ strip_trailing_cr = True
+ else:
+ assert False, "unhandled option"
+
+ if len(args) != 2:
+ raise InternalShellError(cmd, "Error: missing or extra operand")
+
+ def getDirTree(path, basedir=""):
+ # Tree is a tuple of form (dirname, child_trees).
+ # An empty dir has child_trees = [], a file has child_trees = None.
+ child_trees = []
+ for dirname, child_dirs, files in os.walk(os.path.join(basedir, path)):
+ for child_dir in child_dirs:
+ child_trees.append(getDirTree(child_dir, dirname))
+ for filename in files:
+ child_trees.append((filename, None))
+ return path, sorted(child_trees)
+
+ def compareTwoFiles(filepaths):
+ compare_bytes = False
+ encoding = None
+ filelines = []
+ for file in filepaths:
+ try:
+ with open(file, 'r') as f:
+ filelines.append(f.readlines())
+ except UnicodeDecodeError:
+ try:
+ with io.open(file, 'r', encoding="utf-8") as f:
+ filelines.append(f.readlines())
+ encoding = "utf-8"
+ except:
+ compare_bytes = True
+
+ if compare_bytes:
+ return compareTwoBinaryFiles(filepaths)
+ else:
+ return compareTwoTextFiles(filepaths, encoding)
+
+ def compareTwoBinaryFiles(filepaths):
+ filelines = []
+ for file in filepaths:
+ with open(file, 'rb') as f:
+ filelines.append(f.readlines())
+
+ exitCode = 0
+ if hasattr(difflib, 'diff_bytes'):
+ # python 3.5 or newer
+ diffs = difflib.diff_bytes(difflib.unified_diff, filelines[0], filelines[1], filepaths[0].encode(), filepaths[1].encode())
+ diffs = [diff.decode() for diff in diffs]
+ else:
+ # python 2.7
+ func = difflib.unified_diff if unified_diff else difflib.context_diff
+ diffs = func(filelines[0], filelines[1], filepaths[0], filepaths[1])
+
+ for diff in diffs:
+ stdout.write(diff)
+ exitCode = 1
+ return exitCode
+
+ def compareTwoTextFiles(filepaths, encoding):
+ filelines = []
+ for file in filepaths:
+ if encoding is None:
+ with open(file, 'r') as f:
+ filelines.append(f.readlines())
+ else:
+ with io.open(file, 'r', encoding=encoding) as f:
+ filelines.append(f.readlines())
+
+ exitCode = 0
+ def compose2(f, g):
+ return lambda x: f(g(x))
+
+ f = lambda x: x
+ if strip_trailing_cr:
+ f = compose2(lambda line: line.rstrip('\r'), f)
+ if ignore_all_space or ignore_space_change:
+ ignoreSpace = lambda line, separator: separator.join(line.split())
+ ignoreAllSpaceOrSpaceChange = functools.partial(ignoreSpace, separator='' if ignore_all_space else ' ')
+ f = compose2(ignoreAllSpaceOrSpaceChange, f)
+
+ for idx, lines in enumerate(filelines):
+ filelines[idx]= [f(line) for line in lines]
+
+ func = difflib.unified_diff if unified_diff else difflib.context_diff
+ for diff in func(filelines[0], filelines[1], filepaths[0], filepaths[1]):
+ stdout.write(diff)
+ exitCode = 1
+ return exitCode
+
+ def printDirVsFile(dir_path, file_path):
+ if os.path.getsize(file_path):
+ msg = "File %s is a directory while file %s is a regular file"
+ else:
+ msg = "File %s is a directory while file %s is a regular empty file"
+ stdout.write(msg % (dir_path, file_path) + "\n")
+
+ def printFileVsDir(file_path, dir_path):
+ if os.path.getsize(file_path):
+ msg = "File %s is a regular file while file %s is a directory"
+ else:
+ msg = "File %s is a regular empty file while file %s is a directory"
+ stdout.write(msg % (file_path, dir_path) + "\n")
+
+ def printOnlyIn(basedir, path, name):
+ stdout.write("Only in %s: %s\n" % (os.path.join(basedir, path), name))
+
+ def compareDirTrees(dir_trees, base_paths=["", ""]):
+ # Dirnames of the trees are not checked, it's caller's responsibility,
+ # as top-level dirnames are always different. Base paths are important
+ # for doing os.walk, but we don't put it into tree's dirname in order
+ # to speed up string comparison below and while sorting in getDirTree.
+ left_tree, right_tree = dir_trees[0], dir_trees[1]
+ left_base, right_base = base_paths[0], base_paths[1]
+
+ # Compare two files or report file vs. directory mismatch.
+ if left_tree[1] is None and right_tree[1] is None:
+ return compareTwoFiles([os.path.join(left_base, left_tree[0]),
+ os.path.join(right_base, right_tree[0])])
+
+ if left_tree[1] is None and right_tree[1] is not None:
+ printFileVsDir(os.path.join(left_base, left_tree[0]),
+ os.path.join(right_base, right_tree[0]))
+ return 1
+
+ if left_tree[1] is not None and right_tree[1] is None:
+ printDirVsFile(os.path.join(left_base, left_tree[0]),
+ os.path.join(right_base, right_tree[0]))
+ return 1
+
+ # Compare two directories via recursive use of compareDirTrees.
+ exitCode = 0
+ left_names = [node[0] for node in left_tree[1]]
+ right_names = [node[0] for node in right_tree[1]]
+ l, r = 0, 0
+ while l < len(left_names) and r < len(right_names):
+ # Names are sorted in getDirTree, rely on that order.
+ if left_names[l] < right_names[r]:
+ exitCode = 1
+ printOnlyIn(left_base, left_tree[0], left_names[l])
+ l += 1
+ elif left_names[l] > right_names[r]:
+ exitCode = 1
+ printOnlyIn(right_base, right_tree[0], right_names[r])
+ r += 1
+ else:
+ exitCode |= compareDirTrees([left_tree[1][l], right_tree[1][r]],
+ [os.path.join(left_base, left_tree[0]),
+ os.path.join(right_base, right_tree[0])])
+ l += 1
+ r += 1
+
+ # At least one of the trees has ended. Report names from the other tree.
+ while l < len(left_names):
+ exitCode = 1
+ printOnlyIn(left_base, left_tree[0], left_names[l])
+ l += 1
+ while r < len(right_names):
+ exitCode = 1
+ printOnlyIn(right_base, right_tree[0], right_names[r])
+ r += 1
+ return exitCode
+
+ stderr = StringIO()
+ stdout = StringIO()
+ exitCode = 0
+ try:
+ for file in args:
+ if not os.path.isabs(file):
+ file = os.path.realpath(os.path.join(cmd_shenv.cwd, file))
+
+ if recursive_diff:
+ dir_trees.append(getDirTree(file))
+ else:
+ filepaths.append(file)
+
+ if not recursive_diff:
+ exitCode = compareTwoFiles(filepaths)
+ else:
+ exitCode = compareDirTrees(dir_trees)
+
+ except IOError as err:
+ stderr.write("Error: 'diff' command failed, %s\n" % str(err))
+ exitCode = 1
+
+ return ShellCommandResult(cmd, stdout.getvalue(), stderr.getvalue(), exitCode, False)
+
def executeBuiltinRm(cmd, cmd_shenv):
"""executeBuiltinRm - Removes (deletes) files or directories."""
args = expand_glob_expressions(cmd.args, cmd_shenv.cwd)[1:]
@@ -624,6 +838,14 @@ def _executeShCmd(cmd, shenv, results, t
results.append(cmdResult)
return cmdResult.exitCode
+ if cmd.commands[0].args[0] == 'diff':
+ if len(cmd.commands) != 1:
+ raise InternalShellError(cmd.commands[0], "Unsupported: 'diff' "
+ "cannot be part of a pipeline")
+ cmdResult = executeBuiltinDiff(cmd.commands[0], shenv)
+ results.append(cmdResult)
+ return cmdResult.exitCode
+
if cmd.commands[0].args[0] == 'rm':
if len(cmd.commands) != 1:
raise InternalShellError(cmd.commands[0], "Unsupported: 'rm' "
@@ -644,7 +866,7 @@ def _executeShCmd(cmd, shenv, results, t
stderrTempFiles = []
opened_files = []
named_temp_files = []
- builtin_commands = set(['cat', 'diff'])
+ builtin_commands = set(['cat'])
builtin_commands_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "builtin_commands")
# To avoid deadlock, we use a single stderr stream for piped
# output. This is null until we have seen some output using
Removed: llvm/trunk/utils/lit/lit/builtin_commands/diff.py
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/lit/builtin_commands/diff.py?rev=372050&view=auto
==============================================================================
--- llvm/trunk/utils/lit/lit/builtin_commands/diff.py (original)
+++ llvm/trunk/utils/lit/lit/builtin_commands/diff.py (removed)
@@ -1,228 +0,0 @@
-import difflib
-import functools
-import getopt
-import os
-import sys
-
-class DiffFlags():
- def __init__(self):
- self.ignore_all_space = False
- self.ignore_space_change = False
- self.unified_diff = False
- self.recursive_diff = False
- self.strip_trailing_cr = False
-
-def getDirTree(path, basedir=""):
- # Tree is a tuple of form (dirname, child_trees).
- # An empty dir has child_trees = [], a file has child_trees = None.
- child_trees = []
- for dirname, child_dirs, files in os.walk(os.path.join(basedir, path)):
- for child_dir in child_dirs:
- child_trees.append(getDirTree(child_dir, dirname))
- for filename in files:
- child_trees.append((filename, None))
- return path, sorted(child_trees)
-
-def compareTwoFiles(flags, filepaths):
- compare_bytes = False
- encoding = None
- filelines = []
- for file in filepaths:
- try:
- with open(file, 'r') as f:
- filelines.append(f.readlines())
- except UnicodeDecodeError:
- try:
- with io.open(file, 'r', encoding="utf-8") as f:
- filelines.append(f.readlines())
- encoding = "utf-8"
- except:
- compare_bytes = True
-
- if compare_bytes:
- return compareTwoBinaryFiles(flags, filepaths)
- else:
- return compareTwoTextFiles(flags, filepaths, encoding)
-
-def compareTwoBinaryFiles(flags, filepaths):
- filelines = []
- for file in filepaths:
- with open(file, 'rb') as f:
- filelines.append(f.readlines())
-
- exitCode = 0
- if hasattr(difflib, 'diff_bytes'):
- # python 3.5 or newer
- diffs = difflib.diff_bytes(difflib.unified_diff, filelines[0], filelines[1], filepaths[0].encode(), filepaths[1].encode())
- diffs = [diff.decode() for diff in diffs]
- else:
- # python 2.7
- if flags.unified_diff:
- func = difflib.unified_diff
- else:
- func = difflib.context_diff
- diffs = func(filelines[0], filelines[1], filepaths[0], filepaths[1])
-
- for diff in diffs:
- sys.stdout.write(diff)
- exitCode = 1
- return exitCode
-
-def compareTwoTextFiles(flags, filepaths, encoding):
- filelines = []
- for file in filepaths:
- if encoding is None:
- with open(file, 'r') as f:
- filelines.append(f.readlines())
- else:
- with io.open(file, 'r', encoding=encoding) as f:
- filelines.append(f.readlines())
-
- exitCode = 0
- def compose2(f, g):
- return lambda x: f(g(x))
-
- f = lambda x: x
- if flags.strip_trailing_cr:
- f = compose2(lambda line: line.rstrip('\r'), f)
- if flags.ignore_all_space or flags.ignore_space_change:
- ignoreSpace = lambda line, separator: separator.join(line.split())
- ignoreAllSpaceOrSpaceChange = functools.partial(ignoreSpace, separator='' if flags.ignore_all_space else ' ')
- f = compose2(ignoreAllSpaceOrSpaceChange, f)
-
- for idx, lines in enumerate(filelines):
- filelines[idx]= [f(line) for line in lines]
-
- func = difflib.unified_diff if flags.unified_diff else difflib.context_diff
- for diff in func(filelines[0], filelines[1], filepaths[0], filepaths[1]):
- sys.stdout.write(diff)
- exitCode = 1
- return exitCode
-
-def printDirVsFile(dir_path, file_path):
- if os.path.getsize(file_path):
- msg = "File %s is a directory while file %s is a regular file"
- else:
- msg = "File %s is a directory while file %s is a regular empty file"
- sys.stdout.write(msg % (dir_path, file_path) + "\n")
-
-def printFileVsDir(file_path, dir_path):
- if os.path.getsize(file_path):
- msg = "File %s is a regular file while file %s is a directory"
- else:
- msg = "File %s is a regular empty file while file %s is a directory"
- sys.stdout.write(msg % (file_path, dir_path) + "\n")
-
-def printOnlyIn(basedir, path, name):
- sys.stdout.write("Only in %s: %s\n" % (os.path.join(basedir, path), name))
-
-def compareDirTrees(flags, dir_trees, base_paths=["", ""]):
- # Dirnames of the trees are not checked, it's caller's responsibility,
- # as top-level dirnames are always different. Base paths are important
- # for doing os.walk, but we don't put it into tree's dirname in order
- # to speed up string comparison below and while sorting in getDirTree.
- left_tree, right_tree = dir_trees[0], dir_trees[1]
- left_base, right_base = base_paths[0], base_paths[1]
-
- # Compare two files or report file vs. directory mismatch.
- if left_tree[1] is None and right_tree[1] is None:
- return compareTwoFiles(flags,
- [os.path.join(left_base, left_tree[0]),
- os.path.join(right_base, right_tree[0])])
-
- if left_tree[1] is None and right_tree[1] is not None:
- printFileVsDir(os.path.join(left_base, left_tree[0]),
- os.path.join(right_base, right_tree[0]))
- return 1
-
- if left_tree[1] is not None and right_tree[1] is None:
- printDirVsFile(os.path.join(left_base, left_tree[0]),
- os.path.join(right_base, right_tree[0]))
- return 1
-
- # Compare two directories via recursive use of compareDirTrees.
- exitCode = 0
- left_names = [node[0] for node in left_tree[1]]
- right_names = [node[0] for node in right_tree[1]]
- l, r = 0, 0
- while l < len(left_names) and r < len(right_names):
- # Names are sorted in getDirTree, rely on that order.
- if left_names[l] < right_names[r]:
- exitCode = 1
- printOnlyIn(left_base, left_tree[0], left_names[l])
- l += 1
- elif left_names[l] > right_names[r]:
- exitCode = 1
- printOnlyIn(right_base, right_tree[0], right_names[r])
- r += 1
- else:
- exitCode |= compareDirTrees(flags,
- [left_tree[1][l], right_tree[1][r]],
- [os.path.join(left_base, left_tree[0]),
- os.path.join(right_base, right_tree[0])])
- l += 1
- r += 1
-
- # At least one of the trees has ended. Report names from the other tree.
- while l < len(left_names):
- exitCode = 1
- printOnlyIn(left_base, left_tree[0], left_names[l])
- l += 1
- while r < len(right_names):
- exitCode = 1
- printOnlyIn(right_base, right_tree[0], right_names[r])
- r += 1
- return exitCode
-
-def main(argv):
- args = argv[1:]
- try:
- opts, args = getopt.gnu_getopt(args, "wbur", ["strip-trailing-cr"])
- except getopt.GetoptError as err:
- sys.stderr.write("Unsupported: 'diff': %s\n" % str(err))
- sys.exit(1)
-
- flags = DiffFlags()
- filelines, filepaths, dir_trees = ([] for i in range(3))
- for o, a in opts:
- if o == "-w":
- flags.ignore_all_space = True
- elif o == "-b":
- flags.ignore_space_change = True
- elif o == "-u":
- flags.unified_diff = True
- elif o == "-r":
- flags.recursive_diff = True
- elif o == "--strip-trailing-cr":
- flags.strip_trailing_cr = True
- else:
- assert False, "unhandled option"
-
- if len(args) != 2:
- sys.stderr.write("Error: missing or extra operand\n")
- sys.exit(1)
-
- exitCode = 0
- try:
- for file in args:
- if not os.path.isabs(file):
- file = os.path.realpath(os.path.join(os.getcwd(), file))
-
- if flags.recursive_diff:
- dir_trees.append(getDirTree(file))
- else:
- filepaths.append(file)
-
- if not flags.recursive_diff:
- exitCode = compareTwoFiles(flags, filepaths)
- else:
- exitCode = compareDirTrees(flags, dir_trees)
-
- except IOError as err:
- sys.stderr.write("Error: 'diff' command failed, %s\n" % str(err))
- exitCode = 1
-
- sys.exit(exitCode)
-
-if __name__ == "__main__":
- main(sys.argv)
Added: llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-error-0.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-error-0.txt?rev=372051&view=auto
==============================================================================
--- llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-error-0.txt (added)
+++ llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-error-0.txt Mon Sep 16 16:47:46 2019
@@ -0,0 +1,3 @@
+# Check error on a unsupported diff (cannot be part of a pipeline).
+#
+# RUN: diff diff-error-0.txt diff-error-0.txt | echo Output
Removed: llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-pipes.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-pipes.txt?rev=372050&view=auto
==============================================================================
--- llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-pipes.txt (original)
+++ llvm/trunk/utils/lit/tests/Inputs/shtest-shell/diff-pipes.txt (removed)
@@ -1,15 +0,0 @@
-# RUN: echo foo > %t.foo
-# RUN: echo bar > %t.bar
-
-# Check output pipe.
-# RUN: diff %t.foo %t.foo | FileCheck -allow-empty -check-prefix=EMPTY %s
-# RUN: diff -u %t.foo %t.bar | FileCheck %s && false || true
-
-# Fail so lit will print output.
-# RUN: false
-
-# CHECK: @@
-# CHECK-NEXT: -foo
-# CHECK-NEXT: +bar
-
-# EMPTY-NOT: {{.}}
Modified: llvm/trunk/utils/lit/tests/shtest-shell.py
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/tests/shtest-shell.py?rev=372051&r1=372050&r2=372051&view=diff
==============================================================================
--- llvm/trunk/utils/lit/tests/shtest-shell.py (original)
+++ llvm/trunk/utils/lit/tests/shtest-shell.py Mon Sep 16 16:47:46 2019
@@ -34,20 +34,28 @@
# CHECK: error: command failed with exit status: 127
# CHECK: ***
+# CHECK: FAIL: shtest-shell :: diff-error-0.txt
+# CHECK: *** TEST 'shtest-shell :: diff-error-0.txt' FAILED ***
+# CHECK: $ "diff" "diff-error-0.txt" "diff-error-0.txt"
+# CHECK: # command stderr:
+# CHECK: Unsupported: 'diff' cannot be part of a pipeline
+# CHECK: error: command failed with exit status: 127
+# CHECK: ***
+
# CHECK: FAIL: shtest-shell :: diff-error-1.txt
# CHECK: *** TEST 'shtest-shell :: diff-error-1.txt' FAILED ***
# CHECK: $ "diff" "-B" "temp1.txt" "temp2.txt"
# CHECK: # command stderr:
# CHECK: Unsupported: 'diff': option -B not recognized
-# CHECK: error: command failed with exit status: 1
+# CHECK: error: command failed with exit status: 127
# CHECK: ***
# CHECK: FAIL: shtest-shell :: diff-error-2.txt
# CHECK: *** TEST 'shtest-shell :: diff-error-2.txt' FAILED ***
# CHECK: $ "diff" "temp.txt"
# CHECK: # command stderr:
-# CHECK: Error: missing or extra operand
-# CHECK: error: command failed with exit status: 1
+# CHECK: Error: missing or extra operand
+# CHECK: error: command failed with exit status: 127
# CHECK: ***
# CHECK: FAIL: shtest-shell :: diff-error-3.txt
@@ -74,43 +82,18 @@
# CHECK: *** TEST 'shtest-shell :: diff-error-5.txt' FAILED ***
# CHECK: $ "diff"
# CHECK: # command stderr:
-# CHECK: Error: missing or extra operand
-# CHECK: error: command failed with exit status: 1
+# CHECK: Error: missing or extra operand
+# CHECK: error: command failed with exit status: 127
# CHECK: ***
# CHECK: FAIL: shtest-shell :: diff-error-6.txt
# CHECK: *** TEST 'shtest-shell :: diff-error-6.txt' FAILED ***
# CHECK: $ "diff"
# CHECK: # command stderr:
-# CHECK: Error: missing or extra operand
-# CHECK: error: command failed with exit status: 1
-# CHECK: ***
-
-
-# CHECK: FAIL: shtest-shell :: diff-pipes.txt
-
-# CHECK: *** TEST 'shtest-shell :: diff-pipes.txt' FAILED ***
-
-# CHECK: $ "diff" "{{[^"]*}}.foo" "{{[^"]*}}.foo"
-# CHECK-NOT: note
-# CHECK-NOT: error
-# CHECK: $ "FileCheck"
-# CHECK-NOT: note
-# CHECK-NOT: error
-
-# CHECK: $ "diff" "-u" "{{[^"]*}}.foo" "{{[^"]*}}.bar"
-# CHECK: note: command had no output on stdout or stderr
-# CHECK: error: command failed with exit status: 1
-# CHECK: $ "FileCheck"
-# CHECK-NOT: note
-# CHECK-NOT: error
-# CHECK: $ "true"
-
-# CHECK: $ "false"
-
+# CHECK: Error: missing or extra operand
+# CHECK: error: command failed with exit status: 127
# CHECK: ***
-
# CHECK: FAIL: shtest-shell :: diff-r-error-0.txt
# CHECK: *** TEST 'shtest-shell :: diff-r-error-0.txt' FAILED ***
# CHECK: $ "diff" "-r"
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