Graham KingSolvitas perambulumWelcome ! This is the personal site / blog of Graham King. Most people come for the credit card generator, but I think the Categories (top right) are more interesting.June 28, 2014 Dump Go Abstract Syntax TreePosted in Software at 20:09 by grahamGo has good support for examining and modifying Go source code. This is a huge help in writing refactoring and code analysis tools. The first step is usually to parse a source file into it’s Abstract Syntax Tree representation. Here’s a complete program to display the AST for a given Go file:package mainimport ("go/ast""go/parser""go/token""os")func main() {fset := new(token.FileSet)f, _ := parser.ParseFile(fset, os.Args[1], nil, 0)ast.Print(fset, f)}Use:Save that as goast.goBuild it: go build goast.goRun it: ./goast <myfile.go>CommentsMay 24, 2014 Sync, a Unix wayPosted in Software at 05:49 by grahamEver since Dropbox, I’ve been searching for a self-hosted, secure (and now Condi-free) way of keeping my machines synchronised and backed up. There are lots. I tried many, wrote a couple myself, but none were exactly what I wanted.My problem was thinking Windows, looking for a single program. Once I started thinking Unix, looking for modular components, the answers were obvious.StorageFirst we need a remote master storage to sync against, somewhere to backup our files. And we want that exposed as a local filesystem. I use the most obvious answer, sshfs:sudo apt-get install sshfsmkdir -p /home/graham/.backup/crypt  # Why 'crypt'? Read on.sshfs server.example.com:backup /home/graham/.backup/cryptYou can use any storage that can appear as a filesytem, such as FTP (via curlftpfs), NTFS, and many others.EncryptionThere’s two kinds of data: public data, and encrypted data. We want the second kind. Just layer encfs:Read the rest of this entry »CommentsMay 4, 2014 GopherCon 2014 favorite talks, notesPosted in Software at 19:39 by grahamMy favorite talks at GopherCon 2014:Peter Bourgon: Best Practices for Production EnvironmentsSoundcloud were an early Go adopter, and this talk is their distilled learnings from two years of Go: Repo structure, config, logging, testing, deployment, and lots more. The one talk you need if you’re starting (or running) a significant Go project, and you want to do it right.Petar Maymounkov: The Go Circuit: Towards Elastic Computation with No FailuresStick with this one. It starts off quite academic, but gets fascinating very fast. He models whole companies as a distributed system (based on CSP), then builds a language-agnostic cluster programming library where the API is a filesystem The Circuit. One of the highlights of the conference for me was building a filesystem with Petar in the hallway.John Graham-Cumming: A Channel CompendiumJohn is the author of those great in-depth Cloudflare blog posts. Solid talk about Go channels. nil channels always block, so you can ‘disable’ a select clause by setting a cha