From 876357792228f39556400d81518b4b5c86e47563 Mon Sep 17 00:00:00 2001 From: Victor Vrantchan Date: Sat, 27 Jun 2020 22:57:10 -0400 Subject: [PATCH] add initial structure The main change here is initializing micromdm.io as the module. That allows micromdm to decouple from GitHub in the long run. It also means I'll have to set up Go vanity URLs and move or modify the website directory. Other changes: - WIP logging package - Package id with ulid - Tools repo --- Makefile | 14 ++ cmd/tools/tools.go | 8 + go.mod | 9 + go.sum | 356 +++++++++++++++++++++++++++++++++ internal/kit/id/id.go | 12 ++ pkg/log/context.go | 24 +++ pkg/log/log.go | 12 ++ pkg/log/logger.go | 122 +++++++++++ pkg/log/swap_signal.go | 7 + pkg/log/swap_signal_windows.go | 8 + 10 files changed, 572 insertions(+) create mode 100644 Makefile create mode 100644 cmd/tools/tools.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 internal/kit/id/id.go create mode 100644 pkg/log/context.go create mode 100644 pkg/log/log.go create mode 100644 pkg/log/logger.go create mode 100644 pkg/log/swap_signal.go create mode 100644 pkg/log/swap_signal_windows.go diff --git a/Makefile b/Makefile new file mode 100644 index 00000000..090173b8 --- /dev/null +++ b/Makefile @@ -0,0 +1,14 @@ +.PHONY: build + +WORKSPACE := $(dir $(shell go env GOMOD)) +BUILD_DIR := $(WORKSPACE)/build + +export GOBIN=$(BUILD_DIR) + +download: + @echo "Download dependencies" + @go mod download + +install-tools: download + @echo "Installing tools" + @cat cmd/tools/tools.go | grep _ | awk -F'"' '{print $$2}' | xargs -tI % go install % diff --git a/cmd/tools/tools.go b/cmd/tools/tools.go new file mode 100644 index 00000000..cf212934 --- /dev/null +++ b/cmd/tools/tools.go @@ -0,0 +1,8 @@ +// +build tools + +// Binary tools pins command line tools used in this repository. +package main + +import ( + _ "github.com/oklog/ulid/v2/cmd/ulid" +) diff --git a/go.mod b/go.mod new file mode 100644 index 00000000..4a631e58 --- /dev/null +++ b/go.mod @@ -0,0 +1,9 @@ +module micromdm.io + +go 1.14 + +require ( + github.com/go-kit/kit v0.10.0 + github.com/oklog/ulid v1.3.1 // indirect + github.com/oklog/ulid/v2 v2.0.2 +) diff --git a/go.sum b/go.sum new file mode 100644 index 00000000..d57ef1eb --- /dev/null +++ b/go.sum @@ -0,0 +1,356 @@ +cloud.google.com/go v0.26.0/go.mod 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a/pkg/log/context.go b/pkg/log/context.go new file mode 100644 index 00000000..a0d115b6 --- /dev/null +++ b/pkg/log/context.go @@ -0,0 +1,24 @@ +package log + +import ( + "context" + + "github.com/go-kit/kit/log" +) + +type key int + +const loggerKey key = 0 + +func NewContext(ctx context.Context, logger Logger) context.Context { + return context.WithValue(ctx, loggerKey, logger) +} + +func FromContext(ctx context.Context) Logger { + v, ok := ctx.Value(loggerKey).(Logger) + if !ok { + return log.NewNopLogger() + } + + return v +} diff --git a/pkg/log/log.go b/pkg/log/log.go new file mode 100644 index 00000000..21891db0 --- /dev/null +++ b/pkg/log/log.go @@ -0,0 +1,12 @@ +package log + +import ( + "github.com/go-kit/kit/log/level" +) + +type Logger interface { + Log(keyvals ...interface{}) error +} + +func Debug(logger Logger) Logger { return level.Debug(logger) } +func Info(logger Logger) Logger { return level.Info(logger) } diff --git a/pkg/log/logger.go b/pkg/log/logger.go new file mode 100644 index 00000000..1cf7b81b --- /dev/null +++ b/pkg/log/logger.go @@ -0,0 +1,122 @@ +/* +MIT License + +Copyright (c) 2017 Kolide + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +*/ + +// A version of this logger was originally created at Kolide. Borrowed and modified from +// https://github.com/kolide/kit/tree/8cde91971ef08747188adf1f0673c2565598aa73/logutil + +package log + +import ( + "io" + "os" + "os/signal" + + "github.com/go-kit/kit/log" + "github.com/go-kit/kit/log/level" +) + +// Exit logs an an error and message, terminating the program. +// Exit should only be used in package main where it's okay to terminate the program. +// When err is nil, the program exits successfully. +func Exit(logger Logger, err error, msg string) { + if err == nil { + Debug(logger).Log("err", err, "msg", msg) + return + } + Info(logger).Log("err", err, "msg", msg) + os.Exit(1) +} + +// Option sets configuration for the logger. +type Option func(*config) + +// SwapSignal specifies a os.Signal to swap between Debug and Info levels in real time. +// The default is SIGUSR2. +func SwapSignal(sig os.Signal) Option { + return func(c *config) { + c.sig = sig + } +} + +// JSON configures the logger format to JSON. +// The default is logfmt (https://brandur.org/logfmt) +func JSON() Option { + return func(c *config) { + c.format = log.NewJSONLogger + } +} + +// Output configures the log output. Stderr is default. +func Output(w io.Writer) Option { + return func(c *config) { + c.w = w + } +} + +type config struct { + w io.Writer + format func(io.Writer) log.Logger + sig os.Signal +} + +// New creates a Logger. +func New(opts ...Option) *log.SwapLogger { + c := config{ + w: os.Stderr, + format: log.NewLogfmtLogger, + sig: defaultSwapSignal, + } + + for _, optFn := range opts { + optFn(&c) + } + + base := c.format(log.NewSyncWriter(c.w)) + base = log.With(base, "ts", log.DefaultTimestampUTC) + base = level.NewInjector(base, level.InfoValue()) + lev := level.AllowInfo() + + var swapLogger log.SwapLogger + swapLogger.Swap(level.NewFilter(base, lev)) + + go c.swapLevelHandler(base, &swapLogger, false) + return &swapLogger +} + +func (c *config) swapLevelHandler(base Logger, swapLogger *log.SwapLogger, debug bool) { + sigChan := make(chan os.Signal, 1) + signal.Notify(sigChan, c.sig) + for { + <-sigChan + if debug { + newLogger := level.NewFilter(base, level.AllowInfo()) + swapLogger.Swap(newLogger) + } else { + newLogger := level.NewFilter(base, level.AllowDebug()) + swapLogger.Swap(newLogger) + } + Debug(swapLogger).Log("msg", "swapping level", "debug", !debug) + debug = !debug + } +} diff --git a/pkg/log/swap_signal.go b/pkg/log/swap_signal.go new file mode 100644 index 00000000..e29ce4cf --- /dev/null +++ b/pkg/log/swap_signal.go @@ -0,0 +1,7 @@ +// +build !windows + +package log + +import "syscall" + +var defaultSwapSignal = syscall.SIGUSR2 diff --git a/pkg/log/swap_signal_windows.go b/pkg/log/swap_signal_windows.go new file mode 100644 index 00000000..4df5112c --- /dev/null +++ b/pkg/log/swap_signal_windows.go @@ -0,0 +1,8 @@ +// +build windows + +package log + +import "os" + +// TODO(@groob) implement +var defaultSwapSignal = os.Signal(nil)