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网友语录 - 第47期 - 平淡是生活的常态,意外则是生活的意义

这里记录我的一周分享,通常在周六或周日发布。


与本书中论及的其他一些民族不同,中国人还从未受到在文化上占优势的外国人的拓殖。他们的过去不是一部少数人的历史,而是一部多数人的历史:是中国自己的过去,而且是一个两千多年来保持着强有力的统一的过去。虽然中国人认为他们的过去是优越的,但他们只是为自己而说,从未宣称为人类而说。王賡武自选集


Marysia

weekend ! ill. Paco_Yao image


做一个有理性的动物可真好,总能找到理由做自己想做的事。——本杰明 富兰克林


应得的和应给的

对期待的东西,得到了会开心,得不到则伤心。这是人之常情。

有的人期待的多,有的人期待的少。假定人们最终得到的东西是一样多的,那期待多的人失望自然多些。

期望值低的人,失望更少,因此更幸福。

一个人习惯于要求他人应该怎么样怎么样,不管这个他人是谁,都是这个人不快乐的源泉。因为他人是另一个个体,他是他的背景的产物,他有他的处事法则。

然而你总能控制自己的情绪。除了上班拿工资,把其他的所得都当成是礼物。这样想我就觉得人生好过得多。


13 人的一生就好像是到游乐园玩一天
出生的那一刻 就等同于你已经买好了入场券
游乐园门票一经售出概不退换
生命本身就是一场单向旅程
这个设定提醒我们:纠结 为什么来 不如思考 如何玩
即然来到了游乐园就没有理由不开心
应该好好体验这里的一切

你会挑选自己喜欢的项目 去尝试 去挑战 即便害怕也会想到 来都来了 要值回票价 玩一把 死不了
人生也是如此 既然已经来了 就不要虚度这一张门票
去追求让自己心动的事物 去享受属于自己的风景
不必总和别人比较 不必过于执着输赢
最重要是在有限的时光开开心心 玩得尽兴
不要担心出差错 担心这 担心那
不要为还没发生的事情担忧
记住一句话
平淡是生活的常态,意外则是生活的意义。” .
.
今天突然冒出了念头 提醒自己
我们才活这几十年 死才是人生常态
为什么不珍惜这几十年 好好珍惜每一天
把这几十年当成是来迪士尼玩一天 即然来迪士尼了 就开开心心地玩 玩得尽兴 每一个项目都去体验一遍 才对得起手中的门票
知道自己很害怕分别 但是迪士尼总会打烊 就好好挥手说再见 开开心心的最重要
.
.
既然人生像游乐园,那就大胆去玩吧,别让票白买了!


在森林里看花晒太阳

一个奇妙的镜像关系。 你看到的别人是你自己,别人看到的你是别人。 心怀善意的人周遭仿佛是无数座盛放的花园,心怀恶意的人周遭仿佛是无数腐烂的垃圾桶。 你的心,就是你遭遇的境。

A Replied to 在森林里看花晒太阳的小熊

人是主观的。每个人的世界都是主观的,都是自己看待事物方式的投射。你眼里的世界就是你的世界。别人的世界心静如水,不妨碍你的世界翻江倒海。你如何评判这个世界,就定义了你是一个什么样的人

Git Bash Test Compatibility: A Deep Dive into Cross-Platform Bats Issues

Date: September 2, 2025 Context: Investigation and resolution of test failures on Git Bash/Windows

Executive Summary

We encountered widespread test failures when running the eed test suite on Git Bash/Windows, while all tests passed on Linux. Through systematic investigation, we discovered multiple platform-specific issues with bats test framework and developed comprehensive solutions. This document captures the technical journey, root causes, and proven solutions for future reference.

The Problem

Initial Symptoms

  • Multiple test failures on Git Bash: test_eed_logging.bats, test_eed_preview.bats, test_eed_single_param.bats, test_eed_stdin.bats
  • All tests passed perfectly on Linux
  • Mysterious file corruption in safety tests
  • Pipeline-based tests consistently failing with "Command not found" errors

Example Failing Patterns

# This pattern consistently failed on Git Bash:
run bash -c "printf '1d\nw\nq\n' | $SCRIPT_UNDER_TEST --force test.txt -"

# Status: 127 (Command not found)
# Error: bash -c printf '1d\nw\nq\n' | /path/to/eed --force test.txt -

Root Cause Analysis

1. Missing Library Dependencies

Issue: eed_common.sh was using EED_REGEX_INPUT_MODE without sourcing eed_regex_patterns.sh

Symptoms:

  • Logging tests failed because input mode detection returned empty regex
  • Content that should be skipped was being logged

Fix:

# Added to eed_common.sh
source "$(dirname "${BASH_SOURCE[0]}")/eed_regex_patterns.sh"

2. Bats Pipeline Simulation Issues

Issue: Bats implements pipe simulation differently on Windows vs Linux

Technical Details:

  • Linux: Native shell pipes or compatible simulation work correctly
  • Windows/Git Bash: Bats' pipe parsing breaks complex pipeline commands
  • Pattern run bash -c "command | other" becomes bash -c command | other
  • The pipeline executes outside bats' control, losing exit code and output capture

Symptoms:

# What we wrote:
run bash -c "printf '1d\nw\nq\n' | $SCRIPT_UNDER_TEST --force test.txt -"

# What actually executed:
bash -c printf '1d\nw\nq\n' | /path/to/eed --force test.txt -
#           ^^^^^^^^^^^^^^^^^^ Only this part in bash -c
#                              ^^^^^^^^^^^^^^^^^^^^^^^^^ This runs outside bats

3. File System Stat Comparison Issues

Issue: stat output includes microsecond-precision access times that change on every file read

Technical Details:

  • Tests compared full stat output including access times
  • Reading files for verification changed access times
  • Caused false failures in file integrity tests

Before:

original_stat="$(stat sample.txt)"
# ... test runs ...
[[ "$(stat sample.txt)" == "$original_stat" ]]  # Always fails due to access time

4. Regex Pattern Compatibility

Issue: Git Bash regex handling differences in substitute command detection

Technical Details:

  • Fallback regex was too restrictive: s(.)[^\\]*\1.*\1([0-9gp]+)?$
  • Pattern [^\\]* excluded characters needed for patterns like console\.log
  • Made regex more permissive while maintaining safety

Solutions Implemented

Solution 1: Fix Library Dependencies

# In lib/eed_common.sh - added missing source
source "$(dirname "${BASH_SOURCE[0]}")/eed_regex_patterns.sh"

Solution 2: Cross-Platform Pipeline Patterns

A. Heredoc Approach (Recommended for Complex Input)

# Before (fails on Git Bash):
run bash -c "printf '1c\nchanged\n.\nw\nq\n' | $SCRIPT_UNDER_TEST --force test.txt -"

# After (works everywhere):
run "$SCRIPT_UNDER_TEST" --force test.txt - << 'EOF'
1c
changed
.
w
q
EOF

B. GPT's Pipeline-in-Bash-C Pattern (For When Pipes Are Needed)

# Before (fails on Git Bash):
run bash -c "echo '$script' | '$SCRIPT_UNDER_TEST' --force '$TEST_FILE' -"

# After (works everywhere):
run bash -c 'set -o pipefail; echo "$1" | "$2" --force "$3" -' \
    bash "$script" "$SCRIPT_UNDER_TEST" "$TEST_FILE"

Key Elements:

  • Single quotes around entire bash -c content
  • set -o pipefail for proper error propagation
  • Pass variables as arguments ("$1", "$2") to avoid quoting hell
  • Entire pipeline contained within one bash -c execution

Solution 3: Robust File Integrity Testing

# Before (fails due to access time changes):
original_stat="$(stat sample.txt)"
[[ "$(stat sample.txt)" == "$original_stat" ]]

# After (only check relevant attributes):
original_size="$(stat -c %s sample.txt)"
original_mtime="$(stat -c %Y sample.txt)"
original_inode="$(stat -c %i sample.txt)"

[[ "$(stat -c %s sample.txt)" == "$original_size" ]]     # Size unchanged
[[ "$(stat -c %Y sample.txt)" == "$original_mtime" ]]   # Modify time unchanged
[[ "$(stat -c %i sample.txt)" == "$original_inode" ]]   # Inode unchanged

Solution 4: Improved Regex Patterns

# Before (too restrictive):
fallback='s(.)[^\\]*\1.*\1([0-9gp]+)?$'

# After (handles escaped characters properly):
fallback='s([^[:space:]]).*\1.*\1([0-9gp]*)?$'

Testing and Validation

Proof-of-Concept Tests

We created tests/test_printf_pipeline.bats to validate our understanding:

  1. Direct printf pipelines work perfectly (bypassing bats)
  2. GPT's approach works reliably (pipeline within bash -c)
  3. Problematic patterns consistently fail (pipeline across bash -c boundary)

Results

  • Before: Multiple test failures, warnings, file corruption fears
  • After: 256 tests pass, 0 failures, 1 expected skip, 0 warnings

Key Learnings

1. Platform-Specific Tool Behavior

  • Never assume cross-platform tools work identically
  • Bats, while excellent, has platform-specific implementation differences
  • Always test on target platforms, not just development environment

2. Root Cause Investigation Methodology

  • Don't guess, investigate systematically
  • Use bats -x for detailed execution traces
  • Test hypotheses with isolated proof-of-concept code
  • Distinguish between symptoms and root causes

3. Regex and Shell Compatibility

  • Git Bash supports modern regex features when used correctly
  • Issues often stem from tooling layer, not shell capabilities
  • Platform differences in command parsing require careful attention

4. Test Design Best Practices

  • Avoid external dependencies in tests (like python3 for JSON validation)
  • Use heredoc for complex multiline input - most reliable approach
  • Compare only stable file attributes - avoid access times
  • Separate concerns - one test per scenario for better debugging

Recommended Patterns for Future Development

✅ DO: Use Heredoc for Complex Input

run "$COMMAND" file.txt - << 'EOF'
multiline
script
content
EOF

✅ DO: GPT's Pattern for Necessary Pipelines

run bash -c 'set -o pipefail; echo "$1" | "$2" --flags "$3"' \
    bash "$input" "$command" "$target"

❌ DON'T: Pipeline Across bash -c Boundary

run bash -c "printf '...' | command ..."  # Breaks on Git Bash

❌ DON'T: Compare Volatile File Attributes

[[ "$(stat file.txt)" == "$original_stat" ]]  # Access time changes

Files Modified

Core Library

  • lib/eed_common.sh: Added missing regex patterns source
  • lib/eed_regex_patterns.sh: Improved substitute regex fallback

Test Files

  • tests/test_eed_single_param.bats: Printf pipeline → heredoc
  • tests/test_eed_stdin.bats: Printf pipeline → heredoc + GPT pattern
  • tests/test_safety_override_integration.bats: All patterns → GPT approach
  • tests/test_ai_file_lifecycle.bats: Removed python3 dependency
  • tests/test_eed_preview.bats: Fixed stat comparison + separated safety tests

New Infrastructure

  • tests/test_printf_pipeline.bats: Comprehensive pipeline pattern validation

Impact and Metrics

  • Test Reliability: 256/256 tests now pass consistently on Git Bash
  • Warning Elimination: 0 BW01 warnings (previously multiple)
  • Cross-Platform Compatibility: Patterns work on both Windows and Linux
  • Maintainability: Cleaner test patterns, better separation of concerns
  • Documentation: Comprehensive understanding of platform differences

Future Considerations

When Adding New Tests

  1. Use heredoc approach for complex multiline input
  2. Apply GPT's pattern when pipelines are absolutely necessary
  3. Avoid comparing volatile file system attributes
  4. Test on both platforms before considering complete

When Debugging Cross-Platform Issues

  1. Use bats -x to see exact command execution
  2. Create isolated test cases to verify hypotheses
  3. Check for tool-specific implementation differences
  4. Don't assume the issue is with your code - could be tooling

Monitoring

  • Watch for new BW01 warnings as indicator of problematic patterns
  • Ensure CI/CD tests both Linux and Windows environments
  • Regular cross-platform test execution during development

This investigation demonstrates the importance of thorough cross-platform testing and systematic root cause analysis. The solutions we implemented not only fixed immediate issues but established robust patterns for future development.

Key Takeaway: When tools behave differently across platforms, the solution isn't to work around the differences, but to understand them deeply and adopt patterns that work reliably everywhere.