如何在匹配表達式后面的同一行中使用 sed

Question

我收到一條短信：

cat README.md | grep "####.*"                                    
#### Creating a helm chart with 2 child helm chart helm v3
#### Check you helmchart repositories
#### List content of your main-helmchart
#### Helm v3 dependency update
#### Check the content of charts/ folder in main-helmchart/
#### Check what is going to be installed

我試圖讓它看起來像這樣：

  - [Creating a helm chart with 2 child helm chart helm v3](#creating-a-helm-chart-with-2-child-helm-chart-helm-v3)
  - [Check you helmchart repositories](#check-you-helmchart-repositories)
  - [List content of your main-helmchart](#list-content-of-your-main-helmchart)
  - [Helm v3 dependency update](#helm-v3-dependency-update)
  - [Check the content of charts/ folder in main-helmchart/](#check-the-content-of-charts/-folder-in-main-helmchart/)
  - [Check what is going to be installed](#check-what-is-going-to-be-installed)

有什么辦法可以使用sed嗎？

我正在嘗試匹配“#”符號后面的所有內容並替換破折號“-”的空格

cat README.md | sed -E -n  's/^([#]{4}\s)(.*)$/- [\2](#\L\2)/p'  | sed -E  '/#.*/ s/ /-/g'  
--[Creating-a-helm-chart-with-2-child-helm-chart-helm-v3](#creating-a-helm-chart-with-2-child-helm-chart-helm-v3)
--[Check-you-helmchart-repositories](#check-you-helmchart-repositories)
--[List-content-of-your-main-helmchart](#list-content-of-your-main-helmchart)
--[Helm-v3-dependency-update](#helm-v3-dependency-update)
--[Check-the-content-of-charts/-folder-in-main-helmchart/](#check-the-content-of-charts/-folder-in-main-helmchart/)
--[Check-what-is-going-to-be-installed](#check-what-is-going-to-be-installed)

有什么建議嗎？

謝謝

Answer 1

使用GNU sed

$ sed -E 's/^#+ (.*)/- [\1](#\L\1)/; :a s/(\(#[^ ]+) /\1-/g; ta' ip.txt
- [Creating a helm chart with 2 child helm chart helm v3](#creating-a-helm-chart-with-2-child-helm-chart-helm-v3)
- [Check you helmchart repositories](#check-you-helmchart-repositories)
- [List content of your main-helmchart](#list-content-of-your-main-helmchart)
- [Helm v3 dependency update](#helm-v3-dependency-update)
- [Check the content of charts/ folder in main-helmchart/](#check-the-content-of-charts/-folder-in-main-helmchart/)
- [Check what is going to be installed](#check-what-is-going-to-be-installed)

• s/^#+ (.*)/- [\\1](#\\L\\1)/這匹配#### Heading並轉換為- [Heading](#heading)格式
• :as/(\\(#[^ ]+) /\\1-/g; ta這是一個循環，用於替換(#

請注意，您可以更換cat+grep+sed+etc與成單個命令sed -nE '/^#### /{s/^#+ (.*)/- [\\1](#\\L\\1)/; :as/(\\(#[^ ]+) /\\1-/g; ta; p}' ip.txt sed -nE '/^#### /{s/^#+ (.*)/- [\\1](#\\L\\1)/; :as/(\\(#[^ ]+) /\\1-/g; ta; p}' ip.txt

用perl

$ perl -pe 's/#+ (.+)/"- [$1](#" . lc($1) =~ tr| |-|r. ")"/e' ip.txt 
- [Creating a helm chart with 2 child helm chart helm v3](#creating-a-helm-chart-with-2-child-helm-chart-helm-v3)
- [Check you helmchart repositories](#check-you-helmchart-repositories)
- [List content of your main-helmchart](#list-content-of-your-main-helmchart)
- [Helm v3 dependency update](#helm-v3-dependency-update)
- [Check the content of charts/ folder in main-helmchart/](#check-the-content-of-charts/-folder-in-main-helmchart/)
- [Check what is going to be installed](#check-what-is-going-to-be-installed)

Perl 允許在帶有e標志的替換部分中使用 perl 代碼。 因此，您可以在一次替換中完成所有操作。 lc用於小寫轉換， tr用於用-替換空格，依此類推。

對於過濾器+替換，使用perl -ne 'print s/#+ (.+)/"- [$1](#" . lc($1) =~ tr| |-|r. ")"/re if /^#### /' ip.txt

Answer 2

這可能對你有用（GNU sed）：

sed -E '/^#### /{s///;h;y/ /-/;H;g;s/(.*)\n(.*)/   - [\1](#\2)/}' file

對於以####開頭的行，刪除散列。

將剩余部分復制到保留空間 (HS)。

用-替換所有空格。

將修改后的行附加到 HS。

由 HS 替換當前線路。

第一行用方括號括起來，並在三個空格前加上破折號和一個空格，刪除換行符，在第二行前加上一個散列並用括號括起來。