如何使用 awk 根據簡單的規則縮進源文件？

如何根據幾個簡單的規則縮進原始碼？

例如，我使用了 sed 並要求將 selenium HTML 源表轉換為以下類似 rspec 的程式碼。我怎麼能始終如一地縮進和之間describe的行end？理想情況下，我希望能夠添加縮進

describe "Landing" do
visit("http://some_url/url_reset")
visit("http://some_url/url_3_step_minimal_foundation")
# comments
expect(css_vehicle1_auto_year) to be_visible
end
describe "Stage1" do
wait_for_element_present(css_vehicle1_auto_year option_auto_year)
select(auto_year, from: css_vehicle1_auto_year)
...
end
describe "Stage2" do
fill_in(css_driver1_first_name, with: driver1_first_name)
fill_in(css_driver1_last_name, with: driver1_last_name)
...
submit(css_policy_form)
expect(css_vehicle1_coverage_type) to be_visible
end
describe "Stage3" do
wait_for_element_present(css_vehicle1_coverage_type)
select(coverage_type, from: css_vehicle1_coverage_type)
find(css_has_auto_insurance).click
...
submit(css_policy_form)
expect(css_quotes) to be_visible
end

所以我有

describe "Landing" do
 visit("http://some_url/url_reset")
 visit("http://some_url/url_3_step_minimal_foundation")
 # comments
 expect(css_vehicle1_auto_year) to be_visible
end
describe "Stage1" do
 wait_for_element_present(css_vehicle1_auto_year option_auto_year)
 select(auto_year, from: css_vehicle1_auto_year)
 ...
end
describe "Stage2" do
 fill_in(css_driver1_first_name, with: driver1_first_name)
 fill_in(css_driver1_last_name, with: driver1_last_name)
 ...
 submit(css_policy_form)
 expect(css_vehicle1_coverage_type) to be_visible
end
describe "Stage3" do
 wait_for_element_present(css_vehicle1_coverage_type)
 select(coverage_type, from: css_vehicle1_coverage_type)
 find(css_has_auto_insurance).click
 ...
 submit(css_policy_form)
 expect(css_quotes) to be_visible
end

現有 sed 和 awk 的原始碼位於https://jsfiddle.net/4gbj5mh4/，但它真的很亂，不是我要問的。我掌握了簡單的 sed 和 awk 的竅門，但不知道從哪裡開始。

如果它也可以處理遞歸，那就太好了。對我來說不是必需的，但概括可能對使用這個問題的其他人有用，即

describe "a" do
describe "b" do
stuff
more stuff
end
end

到

describe "a" do
 describe "b" do
   stuff
   more stuff
 end
end

順便說一句，我也在進行這種自定義轉換，部分原因是我在 selenium 中將變數用作頁面對象，並且它們破壞了對 rspec 的內置導出。

與awk：

awk '
 /^end/ { sub("  ", "", indent) } # Or { indent = substr(indent, 3) }
 { print indent $0 }
 /^describe/ { indent = indent"  " }
' <file

引用自：https://unix.stackexchange.com/questions/226201