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This article introduces the knowledge of "how to write Shell script comments". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

I. radio comments

Lines that begin with "#" are comments and are ignored by the interpreter.

The code is as follows:

#-

# this is an auto-typing ipa script based on webfrogs's ipa-build writing:

# https://github.com/webfrogs/xcode_shell/blob/master/ipa-build

# function: automatically package etao ios app and produce ipa packages from 14 channels

# Features: automatic packaging without entering any parameters

#-

# user configuration area starts #

#

#

# Project root directory. It is recommended to put this script in the project root directory, so there is no need to change it here.

# App name, make sure it matches the target_name.app name under Product in Xcode

#

# end of user configuration area #

II. Multiline comments

What if you encounter a large piece of code that needs to be commented temporarily and uncommented later in the development process? It is too hard to add a # symbol to each line. You can enclose the code to be commented in a pair of curly braces and define it as a function. If there is no place to call this function, the code will not be executed, achieving the same effect as the comment. Example:

The code is as follows:

NotExce () {

Cp. / a.txt. / b.txt

Mkdir-p {1Pert 2jue 3} / {4jre 5pr 6}

Echo "ok"

}

But if we need to comment on a large piece of shell script, if we all add # in front of each line, which is really not a very comfortable thing for us, then, in shell, is there any way to use c-language comments / *. * / to achieve the effect of a whole paragraph of comments? The notes have been tested and found that the following method is ok.

The code is as follows:

You can even turn the whole shell to be annotated into a function to prevent execution Such as example 2.

There are other ways to comment out multiple lines of shell:

The first is based on Here Documents and: implementation, similar to example 3

If there are backquotes in the annotated content, an error will be reported.

The code is as follows:

:

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