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Refactor error handling #303

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41 changes: 20 additions & 21 deletions cmd/debos/debos.go
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You mention "this paradigm is quite fragile" but all this change seems to do is rather then having a local variable track the error state (in the form of error code) you moved it to marking it in the context. I'm not really sure why that's less fragile ;)

it does make the code a big more clear though so seems reasonable

Original file line number Diff line number Diff line change
Expand Up @@ -50,37 +50,36 @@ func warnLocalhost(variable string, value string) {
Consider using an address that is valid on your network.`

if strings.Contains(value, "localhost") ||
strings.Contains(value, "127.0.0.1") ||
strings.Contains(value, "::1") {
strings.Contains(value, "127.0.0.1") ||
strings.Contains(value, "::1") {
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these don't look like typo fixes

log.Printf(message, variable)
}
}


func main() {
context := debos.DebosContext { &debos.CommonContext{}, "", "" }
context := debos.DebosContext{&debos.CommonContext{}, "", ""}
var options struct {
Backend string `short:"b" long:"fakemachine-backend" description:"Fakemachine backend to use" default:"auto"`
ArtifactDir string `long:"artifactdir" description:"Directory for packed archives and ostree repositories (default: current directory)"`
InternalImage string `long:"internal-image" hidden:"true"`
TemplateVars map[string]string `short:"t" long:"template-var" description:"Template variables (use -t VARIABLE:VALUE syntax)"`
DebugShell bool `long:"debug-shell" description:"Fall into interactive shell on error"`
Shell string `short:"s" long:"shell" description:"Redefine interactive shell binary (default: bash)" optionsl:"" default:"/bin/bash"`
ScratchSize string `long:"scratchsize" description:"Size of disk backed scratch space"`
CPUs int `short:"c" long:"cpus" description:"Number of CPUs to use for build VM (default: 2)"`
Memory string `short:"m" long:"memory" description:"Amount of memory for build VM (default: 2048MB)"`
ShowBoot bool `long:"show-boot" description:"Show boot/console messages from the fake machine"`
EnvironVars map[string]string `short:"e" long:"environ-var" description:"Environment variables (use -e VARIABLE:VALUE syntax)"`
Verbose bool `short:"v" long:"verbose" description:"Verbose output"`
PrintRecipe bool `long:"print-recipe" description:"Print final recipe"`
DryRun bool `long:"dry-run" description:"Compose final recipe to build but without any real work started"`
DisableFakeMachine bool `long:"disable-fakemachine" description:"Do not use fakemachine."`
Backend string `short:"b" long:"fakemachine-backend" description:"Fakemachine backend to use" default:"auto"`
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more spurious changes that aren't typo fixes

ArtifactDir string `long:"artifactdir" description:"Directory for packed archives and ostree repositories (default: current directory)"`
InternalImage string `long:"internal-image" hidden:"true"`
TemplateVars map[string]string `short:"t" long:"template-var" description:"Template variables (use -t VARIABLE:VALUE syntax)"`
DebugShell bool `long:"debug-shell" description:"Fall into interactive shell on error"`
Shell string `short:"s" long:"shell" description:"Redefine interactive shell binary (default: bash)" optionsl:"" default:"/bin/bash"`
ScratchSize string `long:"scratchsize" description:"Size of disk backed scratch space"`
CPUs int `short:"c" long:"cpus" description:"Number of CPUs to use for build VM (default: 2)"`
Memory string `short:"m" long:"memory" description:"Amount of memory for build VM (default: 2048MB)"`
ShowBoot bool `long:"show-boot" description:"Show boot/console messages from the fake machine"`
EnvironVars map[string]string `short:"e" long:"environ-var" description:"Environment variables (use -e VARIABLE:VALUE syntax)"`
Verbose bool `short:"v" long:"verbose" description:"Verbose output"`
PrintRecipe bool `long:"print-recipe" description:"Print final recipe"`
DryRun bool `long:"dry-run" description:"Compose final recipe to build but without any real work started"`
DisableFakeMachine bool `long:"disable-fakemachine" description:"Do not use fakemachine."`
}

// These are the environment variables that will be detected on the
// host and propagated to fakemachine. These are listed lower case, but
// they are detected and configured in both lower case and upper case.
var environ_vars = [...]string {
var environ_vars = [...]string{
"http_proxy",
"https_proxy",
"ftp_proxy",
Expand Down Expand Up @@ -331,7 +330,7 @@ func main() {

for _, a := range r.Actions {
err = a.PostMachine(&context)
if handleError(&context, err, a, "Postmachine") {
if handleError(&context, err, a, "PostMachine") {
return
}
}
Expand Down