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Add PACKER_LOG_PATH for logging to a file 

When the environment variables PACKER_LOG and PACKER_LOG_PATH are both
set the log output will be appended to the PACKER_LOG_PATH file.
This commit is contained in:
Mark Peek 2013-07-13 15:51:27 +00:00
parent fb4a86ef35
commit bad2bfc4e5
1 changed files with 9 additions and 10 deletions
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19
packer.go
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@ -14,23 +14,22 @@ import (
) )
func main() { func main() {
switch packer_log := os.Getenv("PACKER_LOG"); packer_log { // Setup logging if PACKER_LOG is set.
case "": // Log to PACKER_LOG_PATH if it is set, otherwise default to stderr.
if os.Getenv("PACKER_LOG") == "" {
// If we don't have logging explicitly enabled, then disable it // If we don't have logging explicitly enabled, then disable it
log.SetOutput(ioutil.Discard) log.SetOutput(ioutil.Discard)
case "1": } else {
// Legacy logging is enabled, make sure it goes to stderr if log_path := os.Getenv("PACKER_LOG_PATH"); log_path == "" {
log.SetOutput(os.Stderr) log.SetOutput(os.Stderr)
default: } else {
{ file, err := os.OpenFile(log_path, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0600)
// Use a file for logging
file, err := os.OpenFile(packer_log, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0600)
if err == nil { if err == nil {
log.SetOutput(file) log.SetOutput(file)
} else { } else {
// Problem opening the file, fail back to Stderr // Problem opening the file, fail back to Stderr
log.SetOutput(os.Stderr) log.SetOutput(os.Stderr)
log.Printf("Could not open %s for logging (%s). Using stderr instead.", packer_log, err.Error()) log.Printf("Could not open %s for logging (%s). Using stderr instead.", log_path, err.Error())
} }
} }
} }