Command Line Argument Processing in Go: Difference between revisions
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(Created page with "=Internal= *Go Code Examples#Code_Examples =Overview= <font color=darkkhaki>Use the <code>flag</code> package: </font> <syntaxhighlight lang='go'> var port int flag.IntV...") |
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=Internal= | =Internal= | ||
*[[Go Code Examples#Code_Examples]] | *[[Go Code Examples#Code_Examples|Go Code Examples]] | ||
* [[Go Package flag]] | |||
=Overview= | =Overview= | ||
<font color=darkkhaki>Use the <code>flag</code> package: </font> | <font color=darkkhaki>Use the <code>[[Go Package flag|flag]]</code> package: </font> | ||
<syntaxhighlight lang='go'> | <syntaxhighlight lang='go'> | ||
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flag.Parse() | flag.Parse() | ||
</syntaxhighlight> | </syntaxhighlight> | ||
<font color=darkkhaki>I didn't find a way to tel whether the value has been indeed provided on command line or it's the default. This can be a problem when we also read the value from a configuration file, and we want the priority to be, in order: command line, config file and default</font>. | |||
=Positional Arguments= | |||
<syntaxhighlight lang='go'> | |||
args := os.Args | |||
</syntaxhighlight> | |||
<code>args[0]</code> is a string that represents the path of the executable, as it was invoked on the command line. Example: <code>./../bin/metadata</code>. | |||
=TO DEPLETE= | |||
<font color=darkkhaki>TO DEPLETE [[Go Command Line Parsing]]</font> | |||
Latest revision as of 02:31, 18 October 2023
Internal
Overview
Use the flag package:
var port int
flag.IntVar(&port, "port", 8080, "Some documentation for the flag")
flag.Parse()
I didn't find a way to tel whether the value has been indeed provided on command line or it's the default. This can be a problem when we also read the value from a configuration file, and we want the priority to be, in order: command line, config file and default.
Positional Arguments
args := os.Args
args[0] is a string that represents the path of the executable, as it was invoked on the command line. Example: ./../bin/metadata.
TO DEPLETE
TO DEPLETE Go Command Line Parsing