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Go 語言~ 初學筆記
主要學習文件依照下面的連結閱讀
https://github.com/astaxie/build-web-application-with-golang
首先安裝Go,Go也有第三方套件做版本切換gvm.
https://github.com/moovweb/gvm
依照只是裝好後.
$ gvm install go1
Downloading Go source...
Installing go1...
* Compiling...
$ gvm use go1
Now using version go1
$
接下來可以開始試用Go !!
$ go
Go is a tool for managing Go source code.
Usage:
go command [arguments]
The commands are:
build compile packages and dependencies
clean remove object files
doc run godoc on package sources
env print Go environment information
fix run go tool fix on packages
fmt run gofmt on package sources
get download and install packages and dependencies
install compile and install packages and dependencies
list list packages
run compile and run Go program
test test packages
tool run specified go tool
version print Go version
vet run go tool vet on packages
Use "go help [command]" for more information about a command.
Additional help topics:
gopath GOPATH environment variable
packages description of package lists
remote remote import path syntax
testflag description of testing flags
testfunc description of testing functions
Use "go help [topic]" for more information about that topic.
關於幾個重要系統環境變數.gvm都幫你切換好了!
GVM_ROOT=/Users/luosteve/.gvm
GVM_VERSION=1.0.16
GVM_PATH_BACKUP=/Users/luosteve/.gvm/bin:/Users/luosteve/.rvm/gems/ruby-1.9.3-p374/bin:/Users/luosteve/.rvm/gems/ruby-1.9.3-p374@global/bin:/Users/luosteve/.rvm/rubies/ruby-1.9.3-p374/bin:/Users/luosteve/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/go/bin:/Users/luosteve/mybin:/Users/luosteve/bin/google_appengine:/Users/luosteve/.rvm/bin
gvm_go_name=go1
gvm_pkgset_name=global
GOROOT=/Users/luosteve/.gvm/gos/go1
GOPATH=/Users/luosteve/.gvm/pkgsets/go1/global
再來是開發的$GOPATH環境變數
$GOPATH環境變數主要為工作目錄,可為多個.
export GOPATH=~/apple/mygo1;~/apple/mygo2
以上 $GOPATH 目錄主要有三個內容:
- src 原始碼(比如:.go .c .h .s等)
- pkg 編譯後的包(比如:.a)
- bin 編譯後的文件為可執行檔
依照範例建立一個sample,執行go install後會編譯好檔案.
-> % ll
total 8
-rw-r--r-- 1 luosteve staff 2108 2 19 10:36 mymath.a
luosteve@SteveMac [10:36:40] [~/Go/pkg/darwin_amd64]
在依照範例建立好mathapp,執行go build產生mathapp執行檔.[
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