Allow to overwrite build log limit

CHANGELOG.md

 v 0.4.0
 - Added CI=true and GITLAB_CI=true to environment variables
+- Added output_limit (in kilobytes) to runner config which allows to enlarge default build log size
 - Make the debug log human readable
+- Make default build log limit set to 4096 (4MB)
 - Updated kardianos service to fix OSX service installation
 - Updated logrus to make console output readable on Windows
 - Change default log level to warning

common/config.go

@@ -49,6 +49,7 @@ type RunnerConfig struct {
 
 	Shell          *string `toml:"shell" json:"shell"`
 	DisableVerbose *bool   `toml:"disable_verbose" json:"disable_verbose"`
+	OutputLimit    *int    `toml:"output_limit"`
 
 	SSH       *ssh.Config      `toml:"ssh" json:"ssh"`
 	Docker    *DockerConfig    `toml:"docker" json:"docker"`

common/consts.go

@@ -12,5 +12,5 @@ const HealthyChecks = 3
 const HealthCheckInterval = 3600
 const DefaultWaitForServicesTimeout = 30
 const ShutdownTimeout = 30
-const MaxTraceOutputSize = 1024 * 1024 // 1MB
+const DefaultOutputLimit = 4096 // 4MB in kilobytes
 const ForceTraceSentInterval time.Duration = 300

docs/configuration/advanced-configuration.md

@@ -30,6 +30,7 @@ This defines one runner entry.
 | `builds_dir`        | directory where builds will be stored in context of selected executor (Locally, Docker, SSH) |
 | `environment`       | append or overwrite environment variables |
 | `disable_verbose`   | don't print run commands |
+| `output_limit`      | set maximum build log size in kilobytes, by default set to 4096 (4MB) |
 
 Example:
 

executors/executor_abstract.go

@@ -32,6 +32,8 @@ func (e *AbstractExecutor) ReadTrace(pipe *io.PipeReader) {
 	defer e.Debugln("ReadTrace finished")
 
 	traceStopped := false
+	traceOutputLimit := helpers.NonZeroOrDefault(e.Config.OutputLimit, common.DefaultOutputLimit)
+	traceOutputLimit *= 1024
 
 	reader := bufio.NewReader(pipe)
 	for {
@@ -48,8 +50,8 @@ func (e *AbstractExecutor) ReadTrace(pipe *io.PipeReader) {
 			continue
 		}
 
-		if e.Build.BuildLogLen() > common.MaxTraceOutputSize {
-			output := fmt.Sprintf("\nBuild log exceeded limit of %v bytes.", common.MaxTraceOutputSize)
+		if e.Build.BuildLogLen() > traceOutputLimit {
+			output := fmt.Sprintf("\nBuild log exceeded limit of %v bytes.", traceOutputLimit)
 			e.Build.WriteString(output)
 			traceStopped = true
 			break