从Pelican移至Hugo。我需要重写Markdown文件的某些部分。
文章标题，来自此：
Title: Threads
Date: 2017-03-08 04:30:25
Modified: 2017-03-08 03:40:17
Category: Unix
Tags: c,
Slug: an-overwiew-on-threads
Authors: Nsukami
Summary: A long, thin strand of cotton, nylon, or other fibres used in sewing or weaving.
Lang: en
对此：
---
title: Threads
date: 2017-03-08 04:30:25
lastmod: 2017-03-08 03:40:17
categories: ['Unix']
tags: ['c',]
slug: an-overwiew-on-threads
summary: A long, thin strand of cotton, nylon, or other fibres used in sewing or weaving.
---
以及内部链接，来自此：
[processes]({filename}/on-processes.md)
[Threads]({filename}/images/threads-example.gif)
对此：
[processes]({{< ref on-processes >}})
[Threads](/images/threads-example.gif)
我已经有一个转换标题的Awk script。我也有这个Python脚本，我想使用Sed或Awk（主要用于学习目的）重写：
import os
import re
import sys
import glob
import shutil
from tempfile import mkstemp
def replace(file_path):
#Create temp file
fh, abs_path = mkstemp()
with open(fh,'w') as new_file:
with open(file_path, 'r') as old_file:
for line in old_file:
# search for something like
# [this: processes]({filename}/on-processes.md)
# or this: [Threads]({filename}/images/threads-example.gif)
match = re.search( r'(?:!| )?((\[.*\])\((\{filename\})/(.*)\.(.*)\)(?:.|,| )?)', line, re.M|re.I)
if match:
old_link = match.group(1)
if match.group(5).startswith("md"):
# if md file, replace by
# [processes]({{< ref on-processes >}})
new_link = match.group(2)+'({{< ref '+match.group(4)+' >}})'
else:
# if image, replace by
# [Threads](/images/threads-example.gif)
new_link = match.group(2)+'(/'+match.group(4)+'.'+match.group(5)+')'
line = line.replace(old_link, new_link)
new_file.write(line)
#Remove original file
os.remove(file_path)
#Move new file to old file
shutil.move(abs_path, file_path)
if __name__ == '__main__':
# for all md files in content folder
for i, article in enumerate(glob.iglob("./content/post/*.*", recursive=True)):
# replace all internals links
replace(article)
我试图使用Sed，只是为了捕获并打印所有应转换的内部链接：
~/nskm
>> sed -n /^.*\[[[:alnum:]]\]\({filename}.*\)/p on-threads.md
I've written something about [processes]({filename}/on-processes.md). Let's write some notes about threads. This is not really an introduction
to threads. It's more like a little bit of introspection, so we can have an interesting perspective of what are threads.<br><br>
Processes each have their own address space. Threads exist as subsets of a process. Threads are just multiple workers in the same [virtual address space]({filename}/on-processes.md#vas), all threads in a process share the same memory. They can also share open files and other resources. Within that VAS, each thread has its own ID, its own stack, its own program counter, its own independent flow of control, its own registers set. A thread is just a **context of execution**.<br>
[Processes]({filename}/on-processes.md) are created with the [fork()](http://man7.org/linux/man-pages/man2/fork.2.html) system call. However, there is a separate system call, named [clone()](http://man7.org/linux/man-pages/man2/clone.2.html) which is used for creating threads. It works like fork(), but it accepts a number of flags for adjusting its behavior so the child can share some parts of the parent's execution context.
Our c script made a call to clone(), twice. And looking at _some_ of the flags that have been passed, we can see that:
这次，我也尝试使用Awk捕获所有要转换的内部链接：
~/nskm
>> awk '/.*(filename}.*\..*)/' on-threads.md # regex not precise enough
I've written something about [processes]({filename}/on-processes.md). Let's write some notes about threads. This is not really an introduction
to threads. It's more like a little bit of introspection, so we can have an interesting perspective of what are threads.<br><br>
Processes each have their own address space. Threads exist as subsets of a process. Threads are just multiple workers in the same [virtual address space]({filename}/on-processes.md#vas), all threads in a process share the same memory. They can also share open files and other resources. Within that VAS, each thread has its own ID, its own stack, its own program counter, its own independent flow of control, its own registers set. A thread is just a **context of execution**.<br>
[Processes]({filename}/on-processes.md) are created with the [fork()](http://man7.org/linux/man-pages/man2/fork.2.html) system call. However, there is a separate system call, named [clone()](http://man7.org/linux/man-pages/man2/clone.2.html) which is used for creating threads. It works like fork(), but it accepts a number of flags for adjusting its behavior so the child can share some parts of the parent's execution context.
Our c script made a call to clone(), twice. And looking at _some_ of the flags that have been passed, we can see that:
我坚持如何告诉sed / awk不仅要打印，而且这次要替换那些内部链接。如果可能的话，我也想使我的sed regex和awk regex更精确。感谢您提供有关如何从这一点继续的建议。