add and use event bus for UI progress

.golangci.yaml

@@ -1,6 +1,8 @@
 linters-settings:
   funlen:
     lines: 70
+  gocognit:
+    min-complexity: 35
 linters:
   # inverted configuration with `enable-all` and `disable` is not scalable during updates of golangci-lint
   disable-all: true

cmd/cmd.go

@@ -0,0 +1,14 @@
+package cmd
+
+import (
+	"os"
+
+	"github.com/anchore/imgbom/internal/log"
+)
+
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		log.Errorf("could not start application: %w", err)
+		os.Exit(1)
+	}
+}

cmd/init.go

@@ -7,15 +7,17 @@ import (
 	"github.com/anchore/imgbom/imgbom"
 	"github.com/anchore/imgbom/internal/config"
 	"github.com/anchore/imgbom/internal/format"
+	"github.com/anchore/imgbom/internal/log"
 	"github.com/anchore/imgbom/internal/logger"
 	"github.com/anchore/stereoscope"
 	"github.com/spf13/viper"
-	"go.uber.org/zap"
+	"github.com/wagoodman/go-partybus"
 	"gopkg.in/yaml.v2"
 )
 
 var appConfig *config.Application
-var log *zap.SugaredLogger
+var eventBus *partybus.Bus
+var eventSubscription *partybus.Subscription
 
 func initAppConfig() {
 	cfg, err := config.LoadConfigFromFile(viper.GetViper(), &cliOpts)
@@ -36,7 +38,6 @@ func initLogging() {
 	}
 
 	logWrapper := logger.NewZapLogger(config)
-	log = logWrapper.Logger
 	imgbom.SetLogger(logWrapper)
 	stereoscope.SetLogger(logWrapper)
 }
@@ -50,3 +51,11 @@ func logAppConfig() {
 		log.Debugf("Application config:\n%+v", format.Magenta.Format(string(appCfgStr)))
 	}
 }
+
+func initEventBus() {
+	eventBus = partybus.NewBus()
+	eventSubscription = eventBus.Subscribe()
+
+	stereoscope.SetBus(eventBus)
+	imgbom.SetBus(eventBus)
+}

cmd/root.go

@@ -5,10 +5,15 @@ import (
 	"os"
 
 	"github.com/anchore/imgbom/imgbom"
+	"github.com/anchore/imgbom/imgbom/event"
 	"github.com/anchore/imgbom/imgbom/presenter"
 	"github.com/anchore/imgbom/internal"
+	"github.com/anchore/imgbom/internal/bus"
+	"github.com/anchore/imgbom/internal/log"
+	"github.com/anchore/imgbom/internal/ui"
 	"github.com/anchore/stereoscope"
 	"github.com/spf13/cobra"
+	"github.com/wagoodman/go-partybus"
 )
 
 var rootCmd = &cobra.Command{
@@ -23,35 +28,32 @@ Supports the following image sources:
 		"appName": internal.ApplicationName,
 	}),
 	Args: cobra.MaximumNArgs(1),
-	Run:  runCmdWrapper,
+	Run: func(cmd *cobra.Command, args []string) {
+		os.Exit(doRunCmd(cmd, args))
+	},
 }
 
 func init() {
 	setCliOptions()
 
-	cobra.OnInitialize(initAppConfig)
+	cobra.OnInitialize(
-	cobra.OnInitialize(initLogging)
+		initAppConfig,
-	cobra.OnInitialize(logAppConfig)
+		initLogging,
+		logAppConfig,
+		initEventBus,
+	)
 }
 
-func Execute() {
+func startWorker(userImage string) <-chan error {
-	if err := rootCmd.Execute(); err != nil {
+	errs := make(chan error)
-		log.Errorf("could not start application: %w", err)
+	go func() {
-		os.Exit(1)
+		defer close(errs)
-	}
-}
 
-func runCmdWrapper(cmd *cobra.Command, args []string) {
+		log.Infof("Fetching image '%s'", userImage)
-	os.Exit(doRunCmd(cmd, args))
+		img, err := stereoscope.GetImage(userImage)
-}
-
-func doRunCmd(_ *cobra.Command, args []string) int {
-	userImageStr := args[0]
-	log.Infof("Fetching image '%s'", userImageStr)
-	img, err := stereoscope.GetImage(userImageStr)
 		if err != nil {
-		log.Errorf("could not fetch image '%s': %w", userImageStr, err)
+			errs <- fmt.Errorf("could not fetch image '%s': %w", userImage, err)
-		return 1
+			return
 		}
 		defer stereoscope.Cleanup()
 
@@ -66,16 +68,22 @@ func doRunCmd(_ *cobra.Command, args []string) int {
 		log.Info("Cataloging image")
 		catalog, err := imgbom.CatalogImage(img, appConfig.ScopeOpt)
 		if err != nil {
-		log.Errorf("could not catalog image: %w", err)
+			errs <- fmt.Errorf("could not catalog image: %w", err)
-		return 1
 		}
 
 		log.Info("Complete!")
-	err = presenter.GetPresenter(appConfig.PresenterOpt).Present(os.Stdout, img, catalog)
+		bus.Publish(partybus.Event{
-	if err != nil {
+			Type:  event.CatalogerFinished,
-		log.Errorf("could not format catalog results: %w", err)
+			Value: presenter.GetPresenter(appConfig.PresenterOpt, img, catalog),
-		return 1
+		})
-	}
+	}()
-
+	return errs
-	return 0
+}
+
+func doRunCmd(_ *cobra.Command, args []string) int {
+	errs := startWorker(args[0])
+
+	ux := ui.Select(appConfig.CliOptions.Verbosity > 0, appConfig.Quiet)
+
+	return ux(errs, eventSubscription)
 }

go.mod

@@ -3,27 +3,30 @@ module github.com/anchore/imgbom
 go 1.14
 
 require (
+	github.com/Microsoft/hcsshim v0.8.9 // indirect
 	github.com/adrg/xdg v0.2.1
 	github.com/anchore/go-testutils v0.0.0-20200520222037-edc2bf1864fe
-	github.com/anchore/stereoscope v0.0.0-20200616152009-189722bdb61b
+	github.com/anchore/stereoscope v0.0.0-20200624175800-ef5dbfb7cae4
-	github.com/aquasecurity/go-dep-parser v0.0.0-20200123140603-4dc0125084da
+	github.com/containerd/continuity v0.0.0-20200413184840-d3ef23f19fbb // indirect
 	github.com/go-test/deep v1.0.6
 	github.com/google/go-containerregistry v0.1.1 // indirect
+	github.com/gookit/color v1.2.5
 	github.com/gopherjs/gopherjs v0.0.0-20190910122728-9d188e94fb99 // indirect
 	github.com/hashicorp/go-multierror v1.1.0
 	github.com/hashicorp/go-version v1.2.0
-	github.com/mgenware/go-glob v0.0.0-20170209052720-699af28aac4e // indirect
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/mitchellh/mapstructure v1.3.1
+	github.com/opencontainers/runc v0.1.1 // indirect
 	github.com/sergi/go-diff v1.1.0
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/viper v1.7.0
+	github.com/wagoodman/go-partybus v0.0.0-20200526224238-eb215533f07d
+	github.com/wagoodman/go-progress v0.0.0-20200621153512-2778c704bf22
+	github.com/wagoodman/jotframe v0.0.0-20200622123948-2995cbd43525
 	go.uber.org/zap v1.15.0
-	golang.org/x/net v0.0.0-20200602114024-627f9648deb9 // indirect
+	golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9
 	golang.org/x/sys v0.0.0-20200610111108-226ff32320da // indirect
-	google.golang.org/appengine v1.6.6
 	google.golang.org/genproto v0.0.0-20200615140333-fd031eab31e7 // indirect
-	google.golang.org/protobuf v1.24.0 // indirect
 	gopkg.in/ini.v1 v1.57.0 // indirect
 	gopkg.in/yaml.v2 v2.3.0
 )

go.sum

@@ -83,6 +83,7 @@ github.com/GoogleCloudPlatform/k8s-cloud-provider v0.0.0-20190822182118-27a4ced3
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/semver/v3 v3.0.3/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
 github.com/Masterminds/semver/v3 v3.1.0/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
+github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
 github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
 github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5 h1:ygIc8M6trr62pF5DucadTWGdEB4mEyvzi0e2nbcmcyA=
 github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
@@ -105,22 +106,16 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRF
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/anchore/go-testutils v0.0.0-20200520222037-edc2bf1864fe h1:YMXe4RA3qy4Ri5fmGQii/Gn+Pxv3oBfiS/LqzeOVuwo=
 github.com/anchore/go-testutils v0.0.0-20200520222037-edc2bf1864fe/go.mod h1:D3rc2L/q4Hcp9eeX6AIJH4Q+kPjOtJCFhG9za90j+nU=
-github.com/anchore/stereoscope v0.0.0-20200520221116-025e07f1c93e h1:QBwtrM0MXi0z+GcHk3RoSyzaQ+CLgas0bC/uOd1P+PQ=
 github.com/anchore/stereoscope v0.0.0-20200520221116-025e07f1c93e/go.mod h1:bkyLl5VITnrmgErv4S1vDfVz/TGAZ5il6161IQo7w2g=
-github.com/anchore/stereoscope v0.0.0-20200602123205-6c2ce3c0b2d5 h1:eViCIr4O1e4M93nbbMZdrRW0JjqDjPYdtMXEOC3jQQQ=
-github.com/anchore/stereoscope v0.0.0-20200602123205-6c2ce3c0b2d5/go.mod h1:OeCrFeSu8+p02qC7u9/u8wBOh50VQa8eHJjXVuANvLo=
-github.com/anchore/stereoscope v0.0.0-20200604133300-7e63b350b6d6 h1:Fu779yw004jyFH1UkQD8lTf0GmGRfrOQIK5QiqmIwU8=
-github.com/anchore/stereoscope v0.0.0-20200604133300-7e63b350b6d6/go.mod h1:eQ2/Al6XDA7RFk3FVfpjyGRErITRjNciUPIWixHc7kQ=
-github.com/anchore/stereoscope v0.0.0-20200612195212-342a44f79c65 h1:wghtT1rUItLg/gx/LhMx6fYKJwnUGpfXvcA8WGWM/co=
-github.com/anchore/stereoscope v0.0.0-20200612195212-342a44f79c65/go.mod h1:eQ2/Al6XDA7RFk3FVfpjyGRErITRjNciUPIWixHc7kQ=
-github.com/anchore/stereoscope v0.0.0-20200616152009-189722bdb61b h1:LmFKsQi4oj2VJjch7JhQNzJg1A56FjwHqWZz1ZZKgIw=
 github.com/anchore/stereoscope v0.0.0-20200616152009-189722bdb61b/go.mod h1:eQ2/Al6XDA7RFk3FVfpjyGRErITRjNciUPIWixHc7kQ=
+github.com/anchore/stereoscope v0.0.0-20200624175800-ef5dbfb7cae4 h1:bPd6YFo9VDyoTLVcawFNbW9Z8dQA3M/pCgdD22dR0VQ=
+github.com/anchore/stereoscope v0.0.0-20200624175800-ef5dbfb7cae4/go.mod h1:f4LZpPnN/5RpQnzcznDsYNeYavFCAW8CpbHN01G3Lh8=
+github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo29Kk6CurOXKm700vrz8f0KW0JNfpkRJY/8=
 github.com/apex/log v1.1.4/go.mod h1:AlpoD9aScyQfJDVHmLMEcx4oU6LqzkWp4Mg9GdAcEvQ=
 github.com/apex/log v1.3.0/go.mod h1:jd8Vpsr46WAe3EZSQ/IUMs2qQD/GOycT5rPWCO1yGcs=
 github.com/apex/logs v0.0.4/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo=
 github.com/aphistic/golf v0.0.0-20180712155816-02c07f170c5a/go.mod h1:3NqKYiepwy8kCu4PNA+aP7WUV72eXWJeP9/r3/K9aLE=
 github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3stzu0Xys=
-github.com/aquasecurity/go-dep-parser v0.0.0-20200123140603-4dc0125084da/go.mod h1:X42mTIRhgPalSm81Om2kD+3ydeunbC8TZtZj1bvgRo8=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
@@ -160,10 +155,12 @@ github.com/containerd/cgroups v0.0.0-20190919134610-bf292b21730f/go.mod h1:OApqh
 github.com/containerd/console v0.0.0-20180822173158-c12b1e7919c1/go.mod h1:Tj/on1eG8kiEhd0+fhSDzsPAFESxzBBvdyEgyryXffw=
 github.com/containerd/containerd v1.3.0 h1:xjvXQWABwS2uiv3TWgQt5Uth60Gu86LTGZXMJkjc7rY=
 github.com/containerd/containerd v1.3.0/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
+github.com/containerd/containerd v1.3.2 h1:ForxmXkA6tPIvffbrDAcPUIB32QgXkt2XFj+F0UxetA=
 github.com/containerd/containerd v1.3.2/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/containerd v1.3.4 h1:3o0smo5SKY7H6AJCmJhsnCjR2/V2T8VmiHt7seN2/kI=
 github.com/containerd/containerd v1.3.4/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
+github.com/containerd/continuity v0.0.0-20200413184840-d3ef23f19fbb h1:nXPkFq8X1a9ycY3GYQpFNxHh3j2JgY7zDZfq2EXMIzk=
 github.com/containerd/continuity v0.0.0-20200413184840-d3ef23f19fbb/go.mod h1:Dq467ZllaHgAtVp4p1xUQWBrFXR9s/wyoTpG8zOJGkY=
 github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448/go.mod h1:ODA38xgv3Kuk8dQz2ZQXpnv/UZZUHUCL7pnLehbXgQI=
 github.com/containerd/go-runc v0.0.0-20180907222934-5a6d9f37cfa3/go.mod h1:IV7qH3hrUgRmyYrtgEeGWJfWbgcHL9CSRruz2Vqcph0=
@@ -187,6 +184,7 @@ github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7Do
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/devigned/tab v0.1.1/go.mod h1:XG9mPq0dFghrYvoBF3xdRrJzSTX1b7IQrvaL9mzjeJY=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
@@ -199,9 +197,9 @@ github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BU
 github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.7.3-0.20190327010347-be7ac8be2ae0/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/docker v1.4.2-0.20190924003213-a8608b5b67c7/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
-github.com/docker/docker v1.13.1 h1:IkZjBSIc8hBjLpqeAbeE5mca5mNgeatLHBy3GO78BWo=
 github.com/docker/docker v17.12.0-ce-rc1.0.20200309214505-aa6a9891b09c+incompatible h1:G2hY8RD7jB9QaSmcb8mYEIg8QbEvVAB7se8+lXHZHfg=
 github.com/docker/docker v17.12.0-ce-rc1.0.20200309214505-aa6a9891b09c+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker-credential-helpers v0.6.3 h1:zI2p9+1NQYdnG6sMU26EX4aVGlqbInSQxQXLvzJ4RPQ=
 github.com/docker/docker-credential-helpers v0.6.3/go.mod h1:WRaJzqw3CTB9bk10avuGsjVBZsD05qeibJ1/TYlvc0Y=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
@@ -331,9 +329,9 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.4.1 h1:/exdXoGamhu5ONeUJH0deniYLWYvQwW66yvlfiiKTu0=
 github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-containerregistry v0.0.0-20200430153450-5cbd060f5c92/go.mod h1:pD1UFYs7MCAx+ZLShBdttcaOSbyc8F9Na/9IZLNwJeA=
-github.com/google/go-containerregistry v0.0.0-20200601195303-96cf69f03a3c/go.mod h1:npTSyywOeILcgWqd+rvtzGWflIPPcBQhYoOONaY4ltM=
 github.com/google/go-containerregistry v0.1.0 h1:hL5mVw7cTX3SBr64Arpv+cJH93L+Z9Q6WjckImYLB3g=
 github.com/google/go-containerregistry v0.1.0/go.mod h1:npTSyywOeILcgWqd+rvtzGWflIPPcBQhYoOONaY4ltM=
 github.com/google/go-containerregistry v0.1.1 h1:AG8FSAfXglim2l5qSrqp5VK2Xl03PiBf25NiTGGamws=
@@ -356,6 +354,7 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4
 github.com/google/rpmpack v0.0.0-20191226140753-aa36bfddb3a0/go.mod h1:RaTPr0KUf2K7fnZYLNDrr8rxAamWs3iNywJLtQ2AzBg=
 github.com/google/subcommands v1.0.1/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
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@@ -365,12 +364,16 @@ github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5m
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@@ -440,8 +443,11 @@ github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/u
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@@ -460,8 +466,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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@@ -488,8 +494,10 @@ github.com/mattn/go-ieproxy v0.0.1/go.mod h1:pYabZ6IHcRpFh7vIaLfK7rdcWgFEb3SFJ6/
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@@ -498,7 +506,6 @@ github.com/mattn/go-zglob v0.0.1/go.mod h1:9fxibJccNxU2cnpIKLRRFA7zX7qhkJIQWBb44
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@@ -518,6 +525,7 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
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@@ -527,6 +535,7 @@ github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRW
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@@ -550,6 +559,7 @@ github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3I
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@@ -565,6 +575,7 @@ github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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@@ -659,6 +673,7 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
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@@ -691,6 +706,14 @@ github.com/valyala/quicktemplate v1.2.0/go.mod h1:EH+4AkTd43SvgIbQHYu59/cJyxDoOV
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@@ -713,6 +736,7 @@ go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
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 go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
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 go.uber.org/zap v1.15.0 h1:ZZCA22JRF2gQE5FoNmhmrf7jeJJ2uhqDUNRYKm8dvmM=
@@ -723,6 +747,7 @@ golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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@@ -732,7 +757,10 @@ golang.org/x/crypto v0.0.0-20191002192127-34f69633bfdc/go.mod h1:yigFU9vqHzYiE8U
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@@ -756,6 +784,7 @@ golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHl
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@@ -764,6 +793,7 @@ golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
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@@ -818,6 +848,7 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -831,6 +862,7 @@ golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -882,6 +914,7 @@ golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxb
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@@ -950,9 +983,11 @@ golang.org/x/tools v0.0.0-20200426102838-f3a5411a4c3b/go.mod h1:EkVYQZoAsY45+roY
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@@ -1011,8 +1046,6 @@ google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfG
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@@ -1046,6 +1079,7 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
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@@ -1072,7 +1106,9 @@ gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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@@ -1080,6 +1116,7 @@ honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWh
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 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/api v0.17.4/go.mod h1:5qxx6vjmwUVG2nHQTKGlLts8Tbok8PzHl4vHtVFuZCA=
 k8s.io/apimachinery v0.17.4/go.mod h1:gxLnyZcGNdZTCLnq3fgzyg2A5BVCHTNDFrw8AmuJ+0g=

imgbom/cataloger/controller.go

@@ -4,11 +4,15 @@ import (
 	"github.com/anchore/imgbom/imgbom/cataloger/bundler"
 	"github.com/anchore/imgbom/imgbom/cataloger/dpkg"
 	"github.com/anchore/imgbom/imgbom/cataloger/python"
+	"github.com/anchore/imgbom/imgbom/event"
 	"github.com/anchore/imgbom/imgbom/pkg"
 	"github.com/anchore/imgbom/imgbom/scope"
+	"github.com/anchore/imgbom/internal/bus"
 	"github.com/anchore/imgbom/internal/log"
 	"github.com/anchore/stereoscope/pkg/file"
 	"github.com/hashicorp/go-multierror"
+	"github.com/wagoodman/go-partybus"
+	"github.com/wagoodman/go-progress"
 )
 
 var controllerInstance controller
@@ -48,14 +52,36 @@ func (c *controller) add(a Cataloger) {
 	c.catalogers = append(c.catalogers, a)
 }
 
+type Monitor struct {
+	FilesProcessed     progress.Monitorable
+	PackagesDiscovered progress.Monitorable
+}
+
+func (c *controller) trackCataloger() (*progress.Manual, *progress.Manual) {
+	filesProcessed := progress.Manual{}
+	packagesDiscovered := progress.Manual{}
+
+	bus.Publish(partybus.Event{
+		Type: event.CatalogerStarted,
+		Value: Monitor{
+			FilesProcessed:     progress.Monitorable(&filesProcessed),
+			PackagesDiscovered: progress.Monitorable(&packagesDiscovered),
+		},
+	})
+	return &filesProcessed, &packagesDiscovered
+}
+
 func (c *controller) catalog(s scope.Scope) (*pkg.Catalog, error) {
 	catalog := pkg.NewCatalog()
 	fileSelection := make([]file.Reference, 0)
 
+	filesProcessed, packagesDiscovered := c.trackCataloger()
+
 	// ask catalogers for files to extract from the image tar
 	for _, a := range c.catalogers {
 		fileSelection = append(fileSelection, a.SelectFiles(&s)...)
 		log.Debugf("cataloger '%s' selected '%d' files", a.Name(), len(fileSelection))
+		filesProcessed.N += int64(len(fileSelection))
 	}
 
 	// fetch contents for requested selection by catalogers
@@ -75,6 +101,7 @@ func (c *controller) catalog(s scope.Scope) (*pkg.Catalog, error) {
 		}
 
 		log.Debugf("cataloger '%s' discovered '%d' packages", a.Name(), len(packages))
+		packagesDiscovered.N += int64(len(packages))
 
 		for _, p := range packages {
 			catalog.Add(p)
@@ -85,5 +112,8 @@ func (c *controller) catalog(s scope.Scope) (*pkg.Catalog, error) {
 		return nil, errs
 	}
 
+	filesProcessed.SetCompleted()
+	packagesDiscovered.SetCompleted()
+
 	return catalog, nil
 }

imgbom/event/event.go

@@ -0,0 +1,8 @@
+package event
+
+import "github.com/wagoodman/go-partybus"
+
+const (
+	CatalogerStarted  partybus.EventType = "cataloger-started-event"
+	CatalogerFinished partybus.EventType = "cataloger-finished-event"
+)

imgbom/event/parsers/parsers.go

@@ -0,0 +1,61 @@
+package parsers
+
+import (
+	"fmt"
+
+	"github.com/anchore/imgbom/imgbom/cataloger"
+	"github.com/anchore/imgbom/imgbom/event"
+	"github.com/anchore/imgbom/imgbom/presenter"
+	"github.com/wagoodman/go-partybus"
+)
+
+type ErrBadPayload struct {
+	Type  partybus.EventType
+	Field string
+	Value interface{}
+}
+
+func (e *ErrBadPayload) Error() string {
+	return fmt.Sprintf("event='%s' has bad event payload field='%v': '%+v'", string(e.Type), e.Field, e.Value)
+}
+
+func newPayloadErr(t partybus.EventType, field string, value interface{}) error {
+	return &ErrBadPayload{
+		Type:  t,
+		Field: field,
+		Value: value,
+	}
+}
+
+func checkEventType(actual, expected partybus.EventType) error {
+	if actual != expected {
+		return newPayloadErr(expected, "Type", actual)
+	}
+	return nil
+}
+
+func ParseCatalogerStarted(e partybus.Event) (*cataloger.Monitor, error) {
+	if err := checkEventType(e.Type, event.CatalogerStarted); err != nil {
+		return nil, err
+	}
+
+	monitor, ok := e.Value.(cataloger.Monitor)
+	if !ok {
+		return nil, newPayloadErr(e.Type, "Value", e.Value)
+	}
+
+	return &monitor, nil
+}
+
+func ParseCatalogerFinished(e partybus.Event) (presenter.Presenter, error) {
+	if err := checkEventType(e.Type, event.CatalogerFinished); err != nil {
+		return nil, err
+	}
+
+	pres, ok := e.Value.(presenter.Presenter)
+	if !ok {
+		return nil, newPayloadErr(e.Type, "Value", e.Value)
+	}
+
+	return pres, nil
+}

imgbom/lib.go

@@ -6,8 +6,10 @@ import (
 	"github.com/anchore/imgbom/imgbom/logger"
 	"github.com/anchore/imgbom/imgbom/pkg"
 	"github.com/anchore/imgbom/imgbom/scope"
+	"github.com/anchore/imgbom/internal/bus"
 	"github.com/anchore/imgbom/internal/log"
 	"github.com/anchore/stereoscope/pkg/image"
+	"github.com/wagoodman/go-partybus"
 )
 
 func IdentifyDistro(img *image.Image) *distro.Distro {
@@ -26,3 +28,7 @@ func CatalogImage(img *image.Image, o scope.Option) (*pkg.Catalog, error) {
 func SetLogger(logger logger.Logger) {
 	log.Log = logger
 }
+
+func SetBus(b *partybus.Bus) {
+	bus.SetPublisher(b)
+}

imgbom/presenter/json/presenter.go

@@ -9,10 +9,16 @@ import (
 	stereoscopeImg "github.com/anchore/stereoscope/pkg/image"
 )
 
-type Presenter struct{}
+type Presenter struct {
+	img     *stereoscopeImg.Image
+	catalog *pkg.Catalog
+}
 
-func NewPresenter() *Presenter {
+func NewPresenter(img *stereoscopeImg.Image, catalog *pkg.Catalog) *Presenter {
-	return &Presenter{}
+	return &Presenter{
+		img:     img,
+		catalog: catalog,
+	}
 }
 
 type document struct {
@@ -49,25 +55,25 @@ type artifact struct {
 	Metadata  interface{} `json:"metadata"`
 }
 
-func (pres *Presenter) Present(output io.Writer, img *stereoscopeImg.Image, catalog *pkg.Catalog) error {
+func (pres *Presenter) Present(output io.Writer) error {
-	tags := make([]string, len(img.Metadata.Tags))
+	tags := make([]string, len(pres.img.Metadata.Tags))
-	for idx, tag := range img.Metadata.Tags {
+	for idx, tag := range pres.img.Metadata.Tags {
 		tags[idx] = tag.String()
 	}
 
 	doc := document{
 		Image: image{
-			Digest:    img.Metadata.Digest,
+			Digest:    pres.img.Metadata.Digest,
-			Size:      img.Metadata.Size,
+			Size:      pres.img.Metadata.Size,
-			MediaType: string(img.Metadata.MediaType),
+			MediaType: string(pres.img.Metadata.MediaType),
 			Tags:      tags,
-			Layers:    make([]layer, len(img.Layers)),
+			Layers:    make([]layer, len(pres.img.Layers)),
 		},
 		Artifacts: make([]artifact, 0),
 	}
 
 	// populate image...
-	for idx, l := range img.Layers {
+	for idx, l := range pres.img.Layers {
 		doc.Image.Layers[idx] = layer{
 			MediaType: string(l.Metadata.MediaType),
 			Digest:    l.Metadata.Digest,
@@ -76,7 +82,7 @@ func (pres *Presenter) Present(output io.Writer, img *stereoscopeImg.Image, cata
 	}
 
 	// populate artifacts...
-	for p := range catalog.Enumerate() {
+	for p := range pres.catalog.Enumerate() {
 		art := artifact{
 			Name:     p.Name,
 			Version:  p.Version,
@@ -86,7 +92,7 @@ func (pres *Presenter) Present(output io.Writer, img *stereoscopeImg.Image, cata
 		}
 
 		for idx, src := range p.Source {
-			fileMetadata, err := img.FileCatalog.Get(src)
+			fileMetadata, err := pres.img.FileCatalog.Get(src)
 			if err != nil {
 				// TODO: test case
 				log.Errorf("could not get metadata from catalog (presenter=json): %+v", src)

imgbom/presenter/json/presenter_test.go

@@ -36,7 +36,6 @@ var update = flag.Bool("update", false, "update the *.golden files for json pres
 // }
 
 func TestJsonPresenter(t *testing.T) {
-	pres := NewPresenter()
 	var buffer bytes.Buffer
 
 	testImage := "image-simple"
@@ -66,8 +65,10 @@ func TestJsonPresenter(t *testing.T) {
 		Type: pkg.DebPkg,
 	})
 
+	pres := NewPresenter(img, catalog)
+
 	// run presenter
-	err := pres.Present(&buffer, img, catalog)
+	err := pres.Present(&buffer)
 	if err != nil {
 		t.Fatal(err)
 	}

imgbom/presenter/presenter.go

@@ -10,15 +10,16 @@ import (
 )
 
 type Presenter interface {
-	Present(io.Writer, *image.Image, *pkg.Catalog) error
+	Present(io.Writer) error
 }
 
-func GetPresenter(option Option) Presenter {
+func GetPresenter(option Option, img *image.Image, catalog *pkg.Catalog) Presenter {
 	switch option {
 	case JSONPresenter:
-		return json.NewPresenter()
+		return json.NewPresenter(img, catalog)
 	case TextPresenter:
-		return text.NewPresenter()
+		return text.NewPresenter(img, catalog)
+
 	default:
 		return nil
 	}

imgbom/presenter/text/presenter.go

@@ -10,17 +10,23 @@ import (
 )
 
 // Presenter holds the Present method to produce output
-type Presenter struct{}
+type Presenter struct {
+	img     *stereoscopeImg.Image
+	catalog *pkg.Catalog
+}
 
 // NewPresenter is a constructor for a Presenter
-func NewPresenter() *Presenter {
+func NewPresenter(img *stereoscopeImg.Image, catalog *pkg.Catalog) *Presenter {
-	return &Presenter{}
+	return &Presenter{
+		img:     img,
+		catalog: catalog,
+	}
 }
 
 // Present is a method that is in charge of writing to an output buffer
-func (pres *Presenter) Present(output io.Writer, img *stereoscopeImg.Image, catalog *pkg.Catalog) error {
+func (pres *Presenter) Present(output io.Writer) error {
-	tags := make([]string, len(img.Metadata.Tags))
+	tags := make([]string, len(pres.img.Metadata.Tags))
-	for idx, tag := range img.Metadata.Tags {
+	for idx, tag := range pres.img.Metadata.Tags {
 		tags[idx] = tag.String()
 	}
 
@@ -30,7 +36,7 @@ func (pres *Presenter) Present(output io.Writer, img *stereoscopeImg.Image, cata
 
 	fmt.Fprintln(w, "[Image]")
 
-	for idx, l := range img.Layers {
+	for idx, l := range pres.img.Layers {
 		fmt.Fprintln(w, " Layer:\t", idx)
 		fmt.Fprintln(w, " Digest:\t", l.Metadata.Digest)
 		fmt.Fprintln(w, " Size:\t", l.Metadata.Size)
@@ -40,7 +46,7 @@ func (pres *Presenter) Present(output io.Writer, img *stereoscopeImg.Image, cata
 	}
 
 	// populate artifacts...
-	for p := range catalog.Enumerate() {
+	for p := range pres.catalog.Enumerate() {
 		fmt.Fprintln(w, fmt.Sprintf("[%s]", p.Name))
 		fmt.Fprintln(w, " Version:\t", p.Version)
 		fmt.Fprintln(w, " Type:\t", p.Type.String())

imgbom/presenter/text/presenter_test.go

@@ -19,7 +19,6 @@ type PackageInfo struct {
 }
 
 func TestTextPresenter(t *testing.T) {
-	pres := NewPresenter()
 	var buffer bytes.Buffer
 
 	catalog := pkg.NewCatalog()
@@ -53,8 +52,9 @@ func TestTextPresenter(t *testing.T) {
 		l.Metadata.Digest = "sha256:ad8ecdc058976c07e7e347cb89fa9ad86a294b5ceaae6d09713fb035f84115abf3c4a2388a4af3aa60f13b94f4c6846930bdf53"
 	}
 
+	pres := NewPresenter(img, catalog)
 	// run presenter
-	err := pres.Present(&buffer, img, catalog)
+	err := pres.Present(&buffer)
 	if err != nil {
 		t.Fatal(err)
 	}

internal/bus/bus.go

@@ -0,0 +1,19 @@
+package bus
+
+import "github.com/wagoodman/go-partybus"
+
+var publisher partybus.Publisher
+var active bool
+
+func SetPublisher(p partybus.Publisher) {
+	publisher = p
+	if p != nil {
+		active = true
+	}
+}
+
+func Publish(event partybus.Event) {
+	if active {
+		publisher.Publish(event)
+	}
+}

internal/logger/zap.go

@@ -79,7 +79,7 @@ func (l *ZapLogger) getConsoleEncoder(config LogConfig) zapcore.Encoder {
 	encoderConfig := zap.NewProductionEncoderConfig()
 	if config.Structured {
 		encoderConfig.EncodeName = zapcore.FullNameEncoder
-		encoderConfig.EncodeCaller = zapcore.FullCallerEncoder
+		encoderConfig.EncodeCaller = zapcore.ShortCallerEncoder
 		return zapcore.NewJSONEncoder(encoderConfig)
 	}
 	encoderConfig.EncodeTime = nil

internal/ui/common/event_handlers.go

@@ -0,0 +1,22 @@
+package common
+
+import (
+	"fmt"
+	"os"
+
+	imgbomEventParsers "github.com/anchore/imgbom/imgbom/event/parsers"
+	"github.com/wagoodman/go-partybus"
+)
+
+func CatalogerFinishedHandler(event partybus.Event) error {
+	// show the report to stdout
+	pres, err := imgbomEventParsers.ParseCatalogerFinished(event)
+	if err != nil {
+		return fmt.Errorf("bad CatalogerFinished event: %w", err)
+	}
+
+	if err := pres.Present(os.Stdout); err != nil {
+		return fmt.Errorf("unable to show package catalog report: %w", err)
+	}
+	return nil
+}

internal/ui/etui/ephemeral_tui.go

@@ -0,0 +1,102 @@
+package etui
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"sync"
+
+	imgbomEvent "github.com/anchore/imgbom/imgbom/event"
+	"github.com/anchore/imgbom/internal/log"
+	"github.com/anchore/imgbom/internal/ui/common"
+	stereoscopeEvent "github.com/anchore/stereoscope/pkg/event"
+	"github.com/wagoodman/go-partybus"
+	"github.com/wagoodman/jotframe/pkg/frame"
+)
+
+// TODO: specify per-platform implementations with build tags
+
+func setupScreen(output *os.File) *frame.Frame {
+	config := frame.Config{
+		PositionPolicy: frame.PolicyFloatForward,
+		// only report output to stderr, reserve report output for stdout
+		Output: output,
+	}
+
+	fr, err := frame.New(config)
+	if err != nil {
+		log.Errorf("failed to create screen object: %+v", err)
+		return nil
+	}
+	return fr
+}
+
+func OutputToEphemeralTUI(workerErrs <-chan error, subscription *partybus.Subscription) int {
+	output := os.Stderr
+
+	// hide cursor
+	_, _ = fmt.Fprint(output, "\x1b[?25l")
+	// show cursor
+	defer fmt.Fprint(output, "\x1b[?25h")
+
+	fr := setupScreen(output)
+	if fr == nil {
+		return 1
+	}
+
+	var err error
+	var wg = &sync.WaitGroup{}
+	events := subscription.Events()
+	ctx := context.Background()
+
+eventLoop:
+	for {
+		select {
+		case e, ok := <-events:
+			if !ok {
+				// is this unexpected? if so should we indicate this?
+				break eventLoop
+			}
+			switch e.Type {
+			case stereoscopeEvent.ReadImage:
+				err = imageReadHandler(ctx, fr, e, wg)
+				if err != nil {
+					log.Errorf("unable to show read image event: %+v", err)
+				}
+
+			case stereoscopeEvent.FetchImage:
+				err = imageFetchHandler(ctx, fr, e, wg)
+				if err != nil {
+					log.Errorf("unable to show fetch image event: %+v", err)
+				}
+
+			case imgbomEvent.CatalogerStarted:
+				err = catalogerStartedHandler(ctx, fr, e, wg)
+				if err != nil {
+					log.Errorf("unable to show catalog image start event: %+v", err)
+				}
+			case imgbomEvent.CatalogerFinished:
+				// we may have other background processes still displaying progress, wait for them to
+				// finish before discontinuing dynamic content and showing the final report
+				wg.Wait()
+				frame.Close()
+				fmt.Println()
+
+				err := common.CatalogerFinishedHandler(e)
+				if err != nil {
+					log.Errorf("unable to show catalog image finished event: %+v", err)
+				}
+
+				// this is the last expected event
+				break eventLoop
+			}
+		case <-ctx.Done():
+			if ctx.Err() != nil {
+				log.Errorf("cancelled (%+v)", err)
+			}
+			break eventLoop
+		}
+	}
+
+	return 0
+}

internal/ui/etui/event_handlers.go

@@ -0,0 +1,145 @@
+package etui
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"sync"
+	"time"
+
+	imgbomEventParsers "github.com/anchore/imgbom/imgbom/event/parsers"
+	stereoEventParsers "github.com/anchore/stereoscope/pkg/event/parsers"
+	"github.com/gookit/color"
+	"github.com/wagoodman/go-partybus"
+	"github.com/wagoodman/go-progress"
+	"github.com/wagoodman/go-progress/format"
+	"github.com/wagoodman/jotframe/pkg/frame"
+)
+
+const maxBarWidth = 50
+const statusSet = SpinnerDotSet // SpinnerCircleOutlineSet
+const completedStatus = "✔"     //"●"
+const tileFormat = color.Bold
+const statusTitleTemplate = " %s %-28s "
+
+var auxInfoFormat = color.HEX("#777777")
+
+func startProcess() (format.Simple, *Spinner) {
+	width, _ := frame.GetTerminalSize()
+	barWidth := int(0.25 * float64(width))
+	if barWidth > maxBarWidth {
+		barWidth = maxBarWidth
+	}
+	formatter := format.NewSimpleWithTheme(barWidth, format.HeavyNoBarTheme, format.ColorCompleted, format.ColorTodo)
+	spinner := NewSpinner(statusSet)
+
+	return formatter, &spinner
+}
+
+func imageFetchHandler(ctx context.Context, fr *frame.Frame, event partybus.Event, wg *sync.WaitGroup) error {
+	_, prog, err := stereoEventParsers.ParseFetchImage(event)
+	if err != nil {
+		return fmt.Errorf("bad FetchImage event: %w", err)
+	}
+
+	line, err := fr.Append()
+	if err != nil {
+		return err
+	}
+
+	wg.Add(1)
+
+	go func() {
+		defer wg.Done()
+		formatter, spinner := startProcess()
+		stream := progress.Stream(ctx, prog, 150*time.Millisecond)
+		title := tileFormat.Sprint("Fetching image...")
+
+		for p := range stream {
+			progStr, err := formatter.Format(p)
+			spin := color.Magenta.Sprint(spinner.Next())
+			if err != nil {
+				_, _ = io.WriteString(line, fmt.Sprintf("Error: %+v", err))
+			} else {
+				auxInfo := auxInfoFormat.Sprintf("[%s]", prog.Stage())
+				_, _ = io.WriteString(line, fmt.Sprintf(statusTitleTemplate+"%s %s", spin, title, progStr, auxInfo))
+			}
+		}
+
+		spin := color.Green.Sprint(completedStatus)
+		title = tileFormat.Sprint("Fetched image")
+		_, _ = io.WriteString(line, fmt.Sprintf(statusTitleTemplate, spin, title))
+	}()
+	return err
+}
+
+func imageReadHandler(ctx context.Context, fr *frame.Frame, event partybus.Event, wg *sync.WaitGroup) error {
+	_, prog, err := stereoEventParsers.ParseReadImage(event)
+	if err != nil {
+		return fmt.Errorf("bad ReadImage event: %w", err)
+	}
+
+	line, err := fr.Append()
+	if err != nil {
+		return err
+	}
+
+	wg.Add(1)
+
+	go func() {
+		defer wg.Done()
+		formatter, spinner := startProcess()
+		stream := progress.Stream(ctx, prog, 150*time.Millisecond)
+		title := tileFormat.Sprint("Reading image...")
+
+		for p := range stream {
+			progStr, err := formatter.Format(p)
+			spin := color.Magenta.Sprint(spinner.Next())
+			if err != nil {
+				_, _ = io.WriteString(line, fmt.Sprintf("Error: %+v", err))
+			} else {
+				_, _ = io.WriteString(line, fmt.Sprintf(statusTitleTemplate+"%s", spin, title, progStr))
+			}
+		}
+
+		spin := color.Green.Sprint(completedStatus)
+		title = tileFormat.Sprint("Read image")
+		_, _ = io.WriteString(line, fmt.Sprintf(statusTitleTemplate, spin, title))
+	}()
+
+	return nil
+}
+
+func catalogerStartedHandler(ctx context.Context, fr *frame.Frame, event partybus.Event, wg *sync.WaitGroup) error {
+	monitor, err := imgbomEventParsers.ParseCatalogerStarted(event)
+	if err != nil {
+		return fmt.Errorf("bad CatalogerStarted event: %w", err)
+	}
+
+	line, err := fr.Append()
+	if err != nil {
+		return err
+	}
+
+	wg.Add(1)
+
+	go func() {
+		defer wg.Done()
+		_, spinner := startProcess()
+		stream := progress.StreamMonitors(ctx, []progress.Monitorable{monitor.FilesProcessed, monitor.PackagesDiscovered}, 50*time.Millisecond)
+		title := tileFormat.Sprint("Cataloging image...")
+
+		for p := range stream {
+			spin := color.Magenta.Sprint(spinner.Next())
+			auxInfo := auxInfoFormat.Sprintf("[packages %d]", p[1])
+			_, _ = io.WriteString(line, fmt.Sprintf(statusTitleTemplate+"%s", spin, title, auxInfo))
+		}
+
+		spin := color.Green.Sprint(completedStatus)
+		title = tileFormat.Sprint("Cataloged image")
+		auxInfo := auxInfoFormat.Sprintf("[%d packages]", monitor.PackagesDiscovered.Current())
+		_, _ = io.WriteString(line, fmt.Sprintf(statusTitleTemplate+"%s", spin, title, auxInfo))
+	}()
+
+	return nil
+}

internal/ui/etui/spinner.go

@@ -0,0 +1,72 @@
+package etui
+
+import (
+	"strings"
+	"sync"
+)
+
+// TODO: move me to a common module (used in multiple repos)
+
+const (
+	SpinnerCircleOutlineSet = "◜◠◯◎◉●◉◎◯◡◞"
+	SpinnerCircleSet        = "◌◯◎◉●◉◎◯"
+	SpinnerDotSet           = "⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏"
+	SpinnerHorizontalBarSet = "▉▊▋▌▍▎▏▎▍▌▋▊▉"
+	SpinnerVerticalBarSet   = "▁▃▄▅▆▇█▇▆▅▄▃▁"
+	SpinnerDoubleBarSet     = "▁▂▃▄▅▆▇█▉▊▋▌▍▎▏▏▎▍▌▋▊▉█▇▆▅▄▃▂▁"
+	SpinnerArrowSet         = "←↖↑↗→↘↓↙"
+)
+
+var SpinnerCircleDotSet = []string{
+	"⠈⠁",
+	"⠈⠑",
+	"⠈⠱",
+	"⠈⡱",
+	"⢀⡱",
+	"⢄⡱",
+	"⢄⡱",
+	"⢆⡱",
+	"⢎⡱",
+	"⢎⡰",
+	"⢎⡠",
+	"⢎⡀",
+	"⢎⠁",
+	"⠎⠁",
+	"⠊⠁",
+}
+
+type Spinner struct {
+	index   int
+	charset []string
+	lock    sync.Mutex
+}
+
+func NewSpinner(charset string) Spinner {
+	return Spinner{
+		charset: strings.Split(charset, ""),
+	}
+}
+
+func NewSpinnerFromSlice(charset []string) Spinner {
+	return Spinner{
+		charset: charset,
+	}
+}
+
+func (s *Spinner) Current() string {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	return s.charset[s.index]
+}
+
+func (s *Spinner) Next() string {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	c := s.charset[s.index]
+	s.index++
+	if s.index >= len(s.charset) {
+		s.index = 0
+	}
+	return c
+}

internal/ui/logger_output.go

@@ -0,0 +1,42 @@
+package ui
+
+import (
+	imgbomEvent "github.com/anchore/imgbom/imgbom/event"
+	"github.com/anchore/imgbom/internal/log"
+	"github.com/anchore/imgbom/internal/ui/common"
+	"github.com/wagoodman/go-partybus"
+)
+
+func LoggerUI(workerErrs <-chan error, subscription *partybus.Subscription) int {
+	var returnCode int
+
+	events := subscription.Events()
+eventLoop:
+	for {
+		select {
+		case err := <-workerErrs:
+			if err != nil {
+				log.Errorf(err.Error())
+				returnCode = 1
+			}
+		case e, ok := <-events:
+			if !ok {
+				// event bus closed...
+				break eventLoop
+			}
+
+			// ignore all events except for the final event
+			if e.Type == imgbomEvent.CatalogerFinished {
+				err := common.CatalogerFinishedHandler(e)
+				if err != nil {
+					log.Errorf("unable to show catalog image finished event: %+v", err)
+				}
+
+				// this is the last expected event
+				break eventLoop
+			}
+		}
+	}
+
+	return returnCode
+}

internal/ui/select.go

@@ -0,0 +1,28 @@
+package ui
+
+import (
+	"os"
+	"runtime"
+
+	"github.com/anchore/imgbom/internal/ui/etui"
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+// TODO: build tags to exclude options from windows
+
+func Select(verbose, quiet bool) UI {
+	var ui UI
+
+	isStdoutATty := terminal.IsTerminal(int(os.Stdout.Fd()))
+	isStderrATty := terminal.IsTerminal(int(os.Stderr.Fd()))
+	notATerminal := !isStderrATty && !isStdoutATty
+
+	switch {
+	case runtime.GOOS == "windows" || verbose || quiet || notATerminal || !isStderrATty:
+		ui = LoggerUI
+	default:
+		ui = etui.OutputToEphemeralTUI
+	}
+
+	return ui
+}

internal/ui/ui.go

@@ -0,0 +1,7 @@
+package ui
+
+import (
+	"github.com/wagoodman/go-partybus"
+)
+
+type UI func(<-chan error, *partybus.Subscription) int