func (self *RunContext) Run(cmd string, args ...string) error {
cmdObj := exec.Command(cmd, args...)
cmdObj.Dir = self.WorkingDirectory
log.Debug("%v %v", cmd, args)
out, err := cmdObj.CombinedOutput()
self.CombinedOutput = string(out)
if err != nil {
if _, ok := err.(*exec.ExitError); ok {
log.Error("%s", out)
} else {
log.Error("%s", err.Error())
}
}
return err
}
// resolve all dependencies against configuration
func (self *Resolver) ResolveDependencies(deps []*Dependency) ([]*Library, error) {
masterLibs := []*Library{}
resolved := map[string]*Library{}
results := make(chan *Library)
errors := make(chan error)
workQueue := deps
for len(workQueue) > 0 {
// de-duplicate the queue
var err error
if workQueue, err = self.DeduplicateDeps(workQueue); err != nil {
return nil, err
}
// look for already resolved deps that may match
if workQueue, err = self.LibResolveDeps(resolved, workQueue); err != nil {
return nil, err
}
// spawn goroutines for each dependency to be resolved
for _, dep := range workQueue {
go func(dep *Dependency) {
lib, err := self.Resolve(dep)
if err != nil {
errors <- err
} else {
results <- lib
}
}(dep)
}
// wait on all goroutines to finish or fail
tempQueue := make([]*Dependency, 0)
failed := false
for ii := 0; ii < len(workQueue); ii++ {
log.Debug("working on %s of %s", ii, len(workQueue))
select {
case lib := <-results:
log.Debug("Reconciled library: %s", lib.Import)
resolved[lib.Import] = lib
masterLibs = append(masterLibs, lib)
for _, importPath := range lib.Provides {
log.Debug("Submodule: %s", importPath)
resolved[importPath] = lib
}
tempQueue = append(tempQueue, lib.Dependencies...)
case err := <-errors:
log.Error(err)
failed = true
}
}
if failed {
return nil, fmt.Errorf("One or more errors while resolving dependencies.")
}
workQueue = tempQueue
}
return masterLibs, nil
}
func GrapnelMain() {
log.SetFlags(0)
rootCmd.Help =
fmt.Sprintf("Defaults:\n") +
fmt.Sprintf(" Lock file = %s\n", defaultLockFileName) +
fmt.Sprintf(" Package file = %s\n", defaultPackageFileName) +
fmt.Sprintf(" Config file path = %s\n", strings.Join(configFilePath, ", ")+
"\n"+rootCmd.Help)
if err := rootCmd.Execute(os.Args...); err != nil {
log.Error(err)
rootCmd.ShowHelp(os.Args[0])
}
}
func updateFn(cmd *Command, args []string) error {
configureLogging()
if len(args) > 0 {
return fmt.Errorf("Too many arguments for 'update'")
}
// set unset paramters to the defaults
if packageFileName == "" {
packageFileName = defaultPackageFileName
if lockFileName == "" {
// set to default iff there was no package filename set
lockFileName = defaultLockFileName
}
} else if lockFileName == "" {
// compose a new lock file path out of the old package path
lockFileName = path.Join(path.Dir(packageFileName), "grapnel-lock.toml")
}
if targetPath == "" {
targetPath = defaultTargetPath
}
log.Debug("package file: %v", packageFileName)
log.Debug("lock file: %v", lockFileName)
log.Debug("target path: %v", targetPath)
// get dependencies from the grapnel file
log.Info("loading package file: '%s'", packageFileName)
deplist, err := LoadGrapnelDepsfile(packageFileName)
if err != nil {
return err
} else if deplist == nil {
// TODO: fail over to update instead?
return fmt.Errorf("Cannot open grapnel file: '%s'", packageFileName)
}
log.Info("loaded %d dependency definitions", len(deplist))
// open it now before we expend any real effort
lockFile, err := os.Create(lockFileName)
defer lockFile.Close()
if err != nil {
log.Error("Cannot open lock file: '%s'", lockFileName)
return err
}
log.Info("installing to: %v", targetPath)
if err := os.MkdirAll(targetPath, 0755); err != nil {
return err
}
libs := []*Library{}
// cleanup
defer func() {
for _, lib := range libs {
lib.Destroy()
}
}()
// resolve all the dependencies
resolver, err := getResolver()
if err != nil {
return err
}
libs, err = resolver.ResolveDependencies(deplist)
if err != nil {
return err
}
// install all the dependencies
log.Info("Resolved %v dependencies. Installing.", len(libs))
resolver.InstallLibraries(targetPath, libs)
// write the library data out
log.Info("Writing lock file")
for _, lib := range libs {
lib.ToToml(lockFile)
}
if createDsd {
log.Info("Writing dsd file")
dsdFileName := path.Join(path.Dir(lockFileName), "grapnel-dsd.sh")
if err := resolver.ToDsd(dsdFileName, libs); err != nil {
return err
}
}
log.Info("Update complete")
return nil
}
