stephen mcquay
501631a45a
The original reason for having this required configuration parameter was that I didn't think to read the hostname off the request. Doing it this way has the additional benefit of a single server being able to serve a multitude of hostnames. Derek helped me realize this by repeating "there should be sane defaults" like 9000 times (maybe over 9000) till I got so tired of trying to make sure that he understood why I did it that way to begin with that I looked at the problem from a different perspective and like in a dream the solution came to me. fixes #10.
105 lines
2.4 KiB
Go
105 lines
2.4 KiB
Go
/*
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ysvd, a webserver for hosting go get vanity urls.
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The go get command searches for the following header when searching for
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packages:
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<meta name="go-import" content="import-prefix vcs repo-root">
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this is simply a service for aggregating a collection of prefix, vcs, and
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repo-root tuples, and serving the appropriate header over http. For more
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information please refer to the documentation for the go tool found at
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https://golang.org/cmd/go/#hdr-Remote_import_paths
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API
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Assume an instance of ysvd at example.org. In order to add a package
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example.org/foo that points at bitbucket.org/example/foo (a mercurial
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repository) POST the following json object:
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{
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"vcs": "mercurial",
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"repo": "https://bitbucket.org/example/foo"
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}
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to https://example.org/foo.
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Doing so, then visiting https://example.org/foo?go-get=1 will yield a header
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that looks like:
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<meta name="go-import" content="example.org/foo hg https://bitbucket.org/foo">
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The json object sent to server can have two fields: "repo" and "vcs". "repo" is
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required; leaving off the "vcs" member defaults to "git".
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Naming
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The "ysv" in ysvd stands for You're so Vain, the song by Carly Simon.
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*/
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package main
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import (
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"fmt"
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"log"
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"net/http"
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"os"
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"mcquay.me/vain"
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"github.com/kelseyhightower/envconfig"
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)
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const usage = `ysvd
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environment vars:
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YSV_PORT: tcp listen port
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YSV_HOST: hostname to use
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YSV_DB: path to json database
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`
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type config struct {
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Port int
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DB string
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}
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func main() {
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c := &config{
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Port: 4040,
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}
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if err := envconfig.Process("ysv", c); err != nil {
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fmt.Fprintf(os.Stderr, "problem processing environment: %v", err)
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os.Exit(1)
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}
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if len(os.Args) > 1 {
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switch os.Args[1] {
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case "env", "e", "help", "h":
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fmt.Printf("%s\n", usage)
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os.Exit(0)
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}
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}
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if c.DB == "" {
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log.Printf("warning: in-memory db mode; if you do not want this set YSV_DB")
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}
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hostname := "localhost"
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if hn, err := os.Hostname(); err != nil {
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log.Printf("problem getting hostname:", err)
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} else {
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hostname = hn
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}
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log.Printf("serving at: http://%s:%d/", hostname, c.Port)
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sm := http.NewServeMux()
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ms := vain.NewSimpleStore(c.DB)
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if err := ms.Load(); err != nil {
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log.Printf("unable to load db: %v; creating fresh database", err)
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}
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vain.NewServer(sm, ms)
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addr := fmt.Sprintf(":%d", c.Port)
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if err := http.ListenAndServe(addr, sm); err != nil {
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log.Printf("problem with http server: %v", err)
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os.Exit(1)
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}
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}
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