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doc/reference-cmd.html: new introduction

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Compare and explain go, go cmd, and go tool cmd.
The situation is not concisely explained elsewhere in the main docs.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5906043
This commit is contained in:
Rob Pike 2012-03-24 09:29:08 +11:00
parent 2dfcbd0a3b
commit b73046407f
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doc/reference-cmd.html
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@ -4,7 +4,38 @@
}-->
<p>
Click on the links for more documentation and usage messages.
There is a suite of programs to build and process Go source code.
Instead of being run directly, programs in the suite are usually invoked
by the <a href="/cmd/go/">go</a> program.
</p>
<p>
The most common way to run these programs is as a subcommand of the go
program,
for instance as "go fmt". Run like this, the command operates on complete
packages of Go source code, with the go program invoking the underlying binary
with arguments appropriate to package-level processing.
</p>
<p>
The programs can also be run as stand-alone binaries, with unmodified arguments,
using the go tool subcommand, such as "go tool fmt".
This style of invocation allows, for instance, reformatting a single source file rather than
an entire package: "go tool fmt myprogram.go" as compared to
"go fmt mypackage".
Some of the commands, such as prof and yacc, are accessible
only through the go tool subcommand.
</p>
<p>
Finally, two of the commands, fmt and
doc, are also installed as regular binaries called
gofmt and godoc
because they are so often referenced.
</p>
<p>
Click on the links for more documentation, invocation methods, and usage details.
</p>
<table class="dir">
@ -18,10 +49,9 @@ Click on the links for more documentation and usage messages.
<td><a href="/cmd/go/">go</a></td>
<td>&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td>
Go is a tool for managing Go source code.
<br>
Besides compiling and running Go programs, the go command is also used to
invoke the other commands listed below. See the command docs for usage
The <code>go</code> program manages Go source code and runs the other
commands listed here.
See the command docs for usage
details.
<br><br>
</td>
@ -76,7 +106,7 @@ calls whose arguments do not align with the format string.</td>
<tr>
<td><a href="/cmd/yacc/">yacc</a></td>
<td>&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td>Yacc is a version of yacc for Go.</td>
<td>Yacc is a version of yacc that generates parsers implemented in Go.</td>
</tr>
</table>