blocks|key|5407405|text|我建议使用sed来做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5407406|NEW=$(echo+MyDirectoryFileLine++++++++\
+++++%7C+sed+'s/$.$$[A-Z]$/\1-\2/g'+\
+++++%7C+tr+'[:upper:]'+'[:lower:]')|code-block|syntax|javascript|5407407|更新我忘记转换成小写，更新了代码|offset|length|style|BOLD|5407408|entityMap^0|0|0|0|2|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I propose to use sed to do that:

<pre><code>NEW=$(echo MyDirectoryFileLine \
 | sed 's/$.$$[A-Z]$/\1-\2/g' \
 | tr '[:upper:]' '[:lower:]')
</code></pre>

UPD I forget to convert to lower case, updated code

blocks|key|3792653|text|echo+MyDirectoryFileLine+%7C+perl+-ne+'print+lc(join("-",+split(/(?=[A-Z])/)))'|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3792654|打印my-directory-file-line|unstyled|offset|length|style|CODE|3792655|entityMap^0|0|2|M|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>echo MyDirectoryFileLine | perl -ne 'print lc(join("-", split(/(?=[A-Z])/)))'
</code></pre>

prints <code>my-directory-file-line</code>

blocks|key|1127881|text|您可以使用s/$[A-Z]$/-\L\1/g查找大写字母，并将其替换为短划线，但它是小写字母。但是，这会在行首给出一个破折号，因此需要另一个sed表达式来处理它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1127882|这应该是可行的：|1127883|sed+--expression+'s/$[A-Z]$/-\L\1/g'+\
++++--expression+'s/%5E-//'++++++++++++++\
++++<<<+"MyDirectoryFileLine"|code-block|syntax|javascript|1127884|entityMap^0|5|J|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You can use <code>s/$[A-Z]$/-\L\1/g</code> to find an upper case letter and replace it with a dash and it's lower case. However, this gives you a dash at the beginning of the line, so you need another sed expression to handle that. 

This should work:

<pre><code>sed --expression 's/$[A-Z]$/-\L\1/g' \
 --expression 's/^-//' \
 &lt;&lt;&lt; "MyDirectoryFileLine"
</code></pre>

blocks|key|5407454|text|使用GNU+sed：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5407455|echo+"MyDirectoryFileLine"%7Csed+-e+'s/$[A-Z]$/-\L\1/g'|code-block|syntax|javascript|5407456|你只需要去掉第一个破折号，如果这让你困扰的话：|5407457|echo+"MyDirectoryFileLine"%7Csed+-e+'s/$[A-Z]$/-\L\1/g'+-e+'s/%5E-//'|5407458|使用BSD+sed它会更长一些：|5407459|echo+"MyDirectoryFileLine"%7Csed+-e+'s/$[A-Z]$/-\1/g'+-e+'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'+-e+'s/%5E-//'|5407460|更新:+BSD版本将与GNU版本一起工作，因此我建议使用后者。|5407461|entityMap^0|2|3|0|0|0|0|2|3|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|16|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|V|$]]

With GNU sed:

<pre><code>echo "MyDirectoryFileLine"|sed -e 's/$[A-Z]$/-\L\1/g'
</code></pre>

You just need to strip the first dash if that's bothers you:

<pre><code>echo "MyDirectoryFileLine"|sed -e 's/$[A-Z]$/-\L\1/g' -e 's/^-//'
</code></pre>

With BSD sed it it's a bit longer:

<pre><code>echo "MyDirectoryFileLine"|sed -e 's/$[A-Z]$/-\1/g' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/' -e 's/^-//'
</code></pre>

Update: the BSD version will work with the GNU version, so I recommend using the latter.

blocks|key|5407469|text|这可能对你有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5407470|<<<"MyDirectoryFileLine"+sed+'s/[A-Z]/-\l&/g;s/.//'
my-directory-file-line|code-block|syntax|javascript|5407471|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This might work for you:

<pre><code>&lt;&lt;&lt;"MyDirectoryFileLine" sed 's/[A-Z]/-\l&amp;/g;s/.//'
my-directory-file-line
</code></pre>

blocks|key|108592|text|这里发布的解决方案对我来说都不起作用。大多数都不能很好地支持多平台。@4ndraw中的一个很接近，但在多个大写字符相邻的边缘情况下失败(例如：FooMVPClient变成foo-mv-pclient而不是foo-mvp-client)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|108593|这对我很有效：|108594|echo+"MyDirectoryMVPFileLine"++++++++++++++\
%7C+sed+'s/$[a-z]$$[A-Z]$/\1-\2/g'+++++++\
%7C+sed+'s/$[A-Z]\{2,\}$$[A-Z]$/\1-\2/g'+\
%7C+tr+'[:upper:]'+'[:lower:]'|code-block|syntax|javascript|108595|输出：|108596|my-directory-mvp-file-line|108597|entityMap^0|1Z|C|2D|E|2U|E|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

None of the solutions posted here worked for me. Most didn't support multiple platforms well. The one from @4ndrew was close, but it failed on edge cases that had multiple capitalized characters next to each other (example: <code>FooMVPClient</code> turns into <code>foo-mv-pclient</code> instead of <code>foo-mvp-client</code>).

This worked for me:

<pre><code>echo "MyDirectoryMVPFileLine" \
| sed 's/$[a-z]$$[A-Z]$/\1-\2/g' \
| sed 's/$[A-Z]\{2,\}$$[A-Z]$/\1-\2/g' \
| tr '[:upper:]' '[:lower:]'
</code></pre>

output:

<pre><code>my-directory-mvp-file-line
</code></pre>

blocks|key|107833|text|@bilalq的答案略有变化，涵盖了一些更可能的边缘情况：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|107834|echo+"MyDirectoryMVPFileLine"++++++++++++++++++++++++++\
%7C+sed+'s/$[%5EA-Z]$$[A-Z0-9]$/\1-\2/g'+++++++++++++++\
%7C+sed+'s/$[A-Z0-9]$$[A-Z0-9]$$[%5EA-Z]$/\1-\2\3/g'+\
%7C+tr+'[:upper:]'+'[:lower:]'|code-block|syntax|javascript|107835|输出仍然是：|107836|my-directory-mvp-file-line|107837|但也包括：|107838|WhatADeal+->+what-a-deal
TheMVP+->+the-mvp
DoSomeABTesting+->+do-some-ab-testing
The3rdThing+->+the-3rd-thing
The3Things+->+the-3-things
ThingNumber3+->+thing-number-3|107839|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Slight variation on @bilalq's answer that covers some more possible edge cases:

<pre><code>echo "MyDirectoryMVPFileLine" \
| sed 's/$[^A-Z]$$[A-Z0-9]$/\1-\2/g' \
| sed 's/$[A-Z0-9]$$[A-Z0-9]$$[^A-Z]$/\1-\2\3/g' \
| tr '[:upper:]' '[:lower:]'
</code></pre>

output is still:

<pre><code>my-directory-mvp-file-line
</code></pre>

but also:

<pre><code>WhatADeal -&gt; what-a-deal
TheMVP -&gt; the-mvp
DoSomeABTesting -&gt; do-some-ab-testing
The3rdThing -&gt; the-3rd-thing
The3Things -&gt; the-3-things
ThingNumber3 -&gt; thing-number-3
</code></pre>

blocks|key|3792870|text|echo+"SomeACRONYMInCamelCaseString"+\
+%7C+sed+-e+'s/$[a-z]$$[A-Z]$/\1-\L\2/'+\
+%7C+sed+-e+'s/$.*$/\L\1/')|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3792871|sed+-e+'s/$[a-z]$$[A-Z]$/\1-\L\2/'仅当大写字母前面有小写字母时，才用连字符和小写字母替换大写字母。sed+-e+'s/$.*$/\L\1/'将整个字符串放在小写位置|unstyled|offset|length|style|CODE|3792872|entityMap^0|0|0|12|1Y|N|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]|$G|Q|H|R|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|S|8|@]|9|@]|A|$]]]|L|$]]

<pre class="lang-bash prettyprint-override"><code>echo &quot;SomeACRONYMInCamelCaseString&quot; \
 | sed -e 's/$[a-z]$$[A-Z]$/\1-\L\2/' \
 | sed -e 's/$.*$/\L\1/')
</code></pre>
<code>sed -e 's/$[a-z]$$[A-Z]$/\1-\L\2/'</code> replace an uppercase letter with a hyphen and a lowercase letter only if it is preceded by a lowercase letter.
<code>sed -e 's/$.*$/\L\1/'</code> puts the whole string in lowercase

blocks|key|3792906|text|我对"/“(可能用于目录名或github代码库名称)的贡献。它不像它应该做的那样干净，但它可以完成工作。我使用了@Peter贡献作为基础，然后进行了一些调整。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3792907|function+kebab_case()+{
++echo+-n+"$1"+%7C\
++sed+'s/$[%5EA-Z%2B]$$[A-Z0-9]$/\1-\2/g'+%7C\
++sed+'s/$[0-9]$$[A-Z]$/\1-\2/g'+%7C\
++sed+'s/$[A-Z]$$[0-9]$/\1-\2/g'+%7C\
++sed+'s/--/-/g'+%7C\
++sed+'s/$[\/]$-/\1/g'+%7C\
++tr+'[:upper:]'+'[:lower:]'
}

function+assert_kebab_equal()+{
++++local+Actual
++++local+Expected
++++Expected="$1"
++++Actual="$(kebab_case+"$2")"

++++if+[+"${Expected}"+!=+"${Actual}"+];+then
++++++echo+Error:
++++++echo+"++Actual:+${Actual}"
++++++echo+"Expected:+${Expected}"
++++else
++++++echo+"$2"+"$1"+%7C+awk+'{+printf+"%25-30s+->+%25-40s\n",+$1,+$2}'
++++fi
}

assert_kebab_equal+"abc-def"+"AbcDef"
assert_kebab_equal+"/abc-def-ghi/def"+"/AbcDef-Ghi/Def"
assert_kebab_equal+"/ab-cd-ef"+"/AbCdEf"
assert_kebab_equal+"repo-owner/repo-name"+"RepoOwner/RepoName"
assert_kebab_equal+"repo-12-owner/repo-12-name"+"Repo12Owner/Repo12Name"
assert_kebab_equal+"repo-12-3-owner/repo-12-name"+"Repo12-3Owner/Repo12Name"
assert_kebab_equal+"repo-owner/repo-name"+"REPO-OWNER/REPO-NAME"
assert_kebab_equal+"repo-owner-2/repo-name"+"REPO-OWNER2/REPO-NAME"
assert_kebab_equal+"repo-1-owner"+"REPO1-OWNER"
assert_kebab_equal+"repo-1-owner-1/22-repo-2-name"+"REPO1-OWNER1/22REPO-2NAME"


#+Outputs:

AbcDef+++++++++++++++++++++++++->+abc-def+++++++++++++++++++++++++++++++++
/AbcDef-Ghi/Def++++++++++++++++->+/abc-def-ghi/def++++++++++++++++++++++++
/AbCdEf++++++++++++++++++++++++->+/ab-cd-ef+++++++++++++++++++++++++++++++
RepoOwner/RepoName+++++++++++++->+repo-owner/repo-name++++++++++++++++++++
Repo12Owner/Repo12Name+++++++++->+repo-12-owner/repo-12-name++++++++++++++
Repo12-3Owner/Repo12Name+++++++->+repo-12-3-owner/repo-12-name++++++++++++
REPO-OWNER/REPO-NAME+++++++++++->+repo-owner/repo-name++++++++++++++++++++
REPO-OWNER2/REPO-NAME++++++++++->+repo-owner-2/repo-name++++++++++++++++++
REPO1-OWNER++++++++++++++++++++->+repo-1-owner++++++++++++++++++++++++++++
REPO1-OWNER1/22REPO-2NAME++++++->+repo-1-owner-1/22-repo-2-name+++++++++|code-block|syntax|javascript|3792908|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

My modest contribution that works with &quot;/&quot; (possible use for directory names or github repo names). It's not as clean as it could be, but does the job. I've used @Peter contribution as a base, then tweaked a bit.
<pre><code>function kebab_case() {
 echo -n &quot;$1&quot; |\
 sed 's/$[^A-Z+]$$[A-Z0-9]$/\1-\2/g' |\
 sed 's/$[0-9]$$[A-Z]$/\1-\2/g' |\
 sed 's/$[A-Z]$$[0-9]$/\1-\2/g' |\
 sed 's/--/-/g' |\
 sed 's/$[\/]$-/\1/g' |\
 tr '[:upper:]' '[:lower:]'
}

function assert_kebab_equal() {
 local Actual
 local Expected
 Expected=&quot;$1&quot;
 Actual=&quot;$(kebab_case &quot;$2&quot;)&quot;

 if [ &quot;${Expected}&quot; != &quot;${Actual}&quot; ]; then
 echo Error:
 echo &quot; Actual: ${Actual}&quot;
 echo &quot;Expected: ${Expected}&quot;
 else
 echo &quot;$2&quot; &quot;$1&quot; | awk '{ printf &quot;%-30s -&gt; %-40s\n&quot;, $1, $2}'
 fi
}

assert_kebab_equal &quot;abc-def&quot; &quot;AbcDef&quot;
assert_kebab_equal &quot;/abc-def-ghi/def&quot; &quot;/AbcDef-Ghi/Def&quot;
assert_kebab_equal &quot;/ab-cd-ef&quot; &quot;/AbCdEf&quot;
assert_kebab_equal &quot;repo-owner/repo-name&quot; &quot;RepoOwner/RepoName&quot;
assert_kebab_equal &quot;repo-12-owner/repo-12-name&quot; &quot;Repo12Owner/Repo12Name&quot;
assert_kebab_equal &quot;repo-12-3-owner/repo-12-name&quot; &quot;Repo12-3Owner/Repo12Name&quot;
assert_kebab_equal &quot;repo-owner/repo-name&quot; &quot;REPO-OWNER/REPO-NAME&quot;
assert_kebab_equal &quot;repo-owner-2/repo-name&quot; &quot;REPO-OWNER2/REPO-NAME&quot;
assert_kebab_equal &quot;repo-1-owner&quot; &quot;REPO1-OWNER&quot;
assert_kebab_equal &quot;repo-1-owner-1/22-repo-2-name&quot; &quot;REPO1-OWNER1/22REPO-2NAME&quot;


# Outputs:

AbcDef -&gt; abc-def 
/AbcDef-Ghi/Def -&gt; /abc-def-ghi/def 
/AbCdEf -&gt; /ab-cd-ef 
RepoOwner/RepoName -&gt; repo-owner/repo-name 
Repo12Owner/Repo12Name -&gt; repo-12-owner/repo-12-name 
Repo12-3Owner/Repo12Name -&gt; repo-12-3-owner/repo-12-name 
REPO-OWNER/REPO-NAME -&gt; repo-owner/repo-name 
REPO-OWNER2/REPO-NAME -&gt; repo-owner-2/repo-name 
REPO1-OWNER -&gt; repo-1-owner 
REPO1-OWNER1/22REPO-2NAME -&gt; repo-1-owner-1/22-repo-2-name 

</code></pre>

Is there a way to convert something like this:

<pre><code>MyDirectoryFileLine
</code></pre>

to

<pre><code>my-directory-file-line
</code></pre>

I found some ways to convert all letters to uppercase or lowercase, but not in that way; any ideas?

linux bash, camel case string to separate by dash

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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有没有一种方法可以转换成这样的东西：MyDirectoryFileLine至my-directory-file-line我找到了一些方法来将所有字母转换为大写或小写，但不是以这种方式；有什么想法吗？

问linux bash，用短划线分隔的驼峰大小写字符串
EN

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问linux bash，用短划线分隔的驼峰大小写字符串EN