// getGoPath returns first item in the GOPATH list
// If there is no GOPATH set function sets GOPATH to ~/.srclib-gopath and returns ~/.srclib-gopath
func getGoPath() string {
list := os.Getenv("GOPATH")
if list == "" {
goPath := path.Join(util.CurrentUserHomeDir(), ".srclib-gopath")
os.Setenv("GOPATH", goPath)
return goPath
}
return filepath.SplitList(list)[0]
}
func init() {
if Path == "" {
homeDir := util.CurrentUserHomeDir()
if homeDir == "" {
log.Fatalf("Fatal: No SRCLIBPATH and current user has no home directory.")
}
Path = filepath.Join(homeDir, ".srclib")
if err := os.Setenv("SRCLIBPATH", Path); err != nil {
log.Fatalf("Fatal: Could not set SRCLIBPATH environment variable to %q.", Path)
}
}
if CacheDir == "" {
dirs := filepath.SplitList(Path)
CacheDir = filepath.Join(dirs[0], ".cache")
}
}
func installGoToolchain() error {
const toolchain = "sourcegraph.com/sourcegraph/srclib-go"
// Identify if Go is installed already or not.
if _, err := exec.LookPath("go"); isExecErrNotFound(err) {
return errors.New(`
Refusing to install Go toolchain because Go is not installed or is not on the
system path.
-> Please install the latest version of Go (https://golang.org/doc/install) and
run this command again.`)
} else if err != nil {
return err
}
if os.Getenv("GOPATH") == "" {
os.Setenv("GOPATH", path.Join(util.CurrentUserHomeDir(), ".srclib-gopath"))
}
// Add symlink to GOPATH so install succeeds (necessary as long as there's a Go dependency in this toolchain)
if err := symlinkToGopath(toolchain); err != nil {
return err
}
srclibpathDir := filepath.Join(filepath.SplitList(srclib.Path)[0], toolchain) // toolchain dir under SRCLIBPATH
if err := os.MkdirAll(filepath.Dir(srclibpathDir), 0700); err != nil {
return err
}
log.Println("Downloading Go toolchain")
if err := cloneToolchain(srclibpathDir, toolchain); err != nil {
return err
}
log.Println("Building Go toolchain program")
if err := execCmdInDir(srclibpathDir, "make"); err != nil {
return err
}
return nil
}