A Quick Introduction to System Tools Programming with Go Presentation.pdf

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1、QuickIntroductiontoSystemToolsProgrammingwithGo!ChrisMcEnirySonyNetworkEntertainment@macmceniryhttp://blog.corgalabs.com/AdministiviaGoals!GainanoviceunderstandingoftheGoProgrammingLanguage!KnowhowtoapplythatunderstandingtocommonworkneedsthatSysadminsseeSomethingstoknowbeforewegetstarted

2、!Go-Why?-Opinionated-Howtogetstarted!TheTutorial-Conventions-ExamplesWhyGo?!Simpleenoughlanguagetokeepitinyourhead!Built-inConcurrencyPrimitives!FastCompilation!SimplifiedDeployments!Flexibilityofadynamiclanguage.Safetyofastatic!Builtingarbagecollection-avoidmemorygamesOpnionated!There’s

3、awaytodowhitespace:gofmt!Veryfewcontrolstructures(8statementterminatingkeywords)!Justoneloop:for!Nosemicolons!Noextraparenthesisinconditionals!Allerrors,notwarnings!Mustusewhatyoudeclare!Everythingisinitialized!“Ordernotspecified”reallydoesmeanyoucan’trelyonthereturnorderGettingStarted!D

4、ownloadgo!SetEnvironmentVariables-GOROOT:LocationoftheGotools-GOPATH:LocationoftheWorkspace!Workspace:Workingdirectoryforaproject-bin,pkg,src-WorkspaceisnotwhatgoesunderversioncontrolInvocations!gorun:Executeagofile!gobuild:Buildastandaloneobjectfileorexecutable!goinstall:Installfromthes

5、ourcetreeapackageorbinary!godoc:Printoutembeddeddocumentationforapackage!godoc:Extractsandgeneratesdocuementationforapackage(andcanhostawebserverforit)!gofmt:Appliesstandardformattingtoapackage!gofmt:Appliesstandardformattingtostdin!goget:Downloadmodulesrcfromanupstreamrepository!gohelp:

6、CommandlinehelpConventionsusedinthispresentation!Informationaltext-Arial!Code-Chalkboardvar(!foo=1!bar=2)!!Shell-Courierecho“helloFOO”

7、!sed-e’s/FOO/world;Kata!Usingarealexampletoconveytheconcepts!Brokenintomultiplesections-Eachfocusingonaparticularmethod!Fourwaystofollowalong:-Readalong

8、ontheslides-Readthegithubcodehttps://github.com/cmceniry/gotutorial-RuntheVMbeingpassedaroundonUSBstick.Login:golang/golang-vagrantupfromthemaincoderepository!Keepituptodatewiththetutorial:goget-ugithub.com/cmceniry/gotutorial!!Examplenamewillbenotedinthebottomrightcorner