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logs.go
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logs.go
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package logs
import (
"context"
"errors"
"io"
"strconv"
"github.com/appcelerator/amp/api/rpc/logs"
"github.com/appcelerator/amp/cli"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"google.golang.org/grpc/status"
)
const SinceMax = 100
type LogsOptions struct {
Follow bool
IncludeAmpLogs bool
Meta bool
Raw bool
Number int32
Msg string
Regexp bool
Container string
Stack string
Node string
Since int32
}
func AddLogFlags(flags *pflag.FlagSet, opts *LogsOptions) {
flags.BoolVarP(&opts.Follow, "follow", "f", false, "Follow log output")
flags.BoolVarP(&opts.IncludeAmpLogs, "include", "i", false, "Include AMP logs")
flags.BoolVarP(&opts.Meta, "meta", "m", false, "Display entry metadata")
flags.Int32VarP(&opts.Number, "number", "n", 1000, "Number of results")
flags.StringVar(&opts.Msg, "msg", "", "Filter the message content by the given pattern")
flags.BoolVar(&opts.Regexp, "regexp", false, "Treat '--msg' option as a regular expression")
flags.StringVar(&opts.Container, "container", "", "Filter by the given Container")
flags.StringVar(&opts.Node, "node", "", "Filter by the given node")
flags.BoolVarP(&opts.Raw, "raw", "r", false, "Display raw logs (no prefix)")
flags.Int32Var(&opts.Since, "since", 2, "Number of days to include in the search (maximum "+strconv.Itoa(SinceMax)+")")
}
// NewLogsCommand returns a new instance of the logs command.
func NewLogsCommand(c cli.Interface) *cobra.Command {
opts := LogsOptions{}
cmd := &cobra.Command{
Use: "logs [OPTIONS] SERVICE",
Short: "Display logs matching provided criteria",
RunE: func(cmd *cobra.Command, args []string) error {
return GetLogs(c, args, opts)
},
}
flags := cmd.Flags()
AddLogFlags(flags, &opts)
flags.StringVar(&opts.Stack, "stack", "", "Filter by the given stack")
return cmd
}
func GetLogs(c cli.Interface, args []string, opts LogsOptions) error {
request := logs.GetRequest{}
if len(args) > 0 {
request.Service = args[0]
}
request.Message = opts.Msg
request.Regexp = opts.Regexp
request.Container = opts.Container
request.Stack = opts.Stack
request.Node = opts.Node
request.Size = opts.Number
request.IncludeAmpLogs = opts.IncludeAmpLogs
request.Since = opts.Since
if request.Since > SinceMax {
request.Since = SinceMax
}
// Get logs from amplifier
ctx := context.Background()
conn := c.ClientConn()
lc := logs.NewLogsClient(conn)
r, err := lc.LogsGet(ctx, &request)
if err != nil {
if s, ok := status.FromError(err); ok {
return errors.New(s.Message())
}
}
for _, entry := range r.Entries {
displayLogEntry(c, entry, opts.Meta, opts.Raw)
}
if !opts.Follow {
return nil
}
// If Follow is requested, get subsequent logs and stream it
stream, err := lc.LogsGetStream(ctx, &request)
if err != nil {
if s, ok := status.FromError(err); ok {
return errors.New(s.Message())
}
}
for {
entry, err := stream.Recv()
if err == io.EOF {
break
}
if err != nil {
if s, ok := status.FromError(err); ok {
return errors.New(s.Message())
}
}
displayLogEntry(c, entry, opts.Meta, opts.Raw)
}
return nil
}
func displayLogEntry(c cli.Interface, entry *logs.LogEntry, meta bool, raw bool) {
if meta {
c.Console().Printf("%+v\n", entry)
} else if raw {
c.Console().Printf("%s\n", entry.Msg)
} else {
c.Console().Printf("%24s | %s\n", entry.ServiceName+"."+strconv.Itoa(int(entry.TaskSlot)), entry.Msg)
}
}