Merge branch 'v3.4.x' into nvidia

25 files changed, 548 insertions, 158 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4468be..30c9ad8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,16 +15,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [3.4.x] - ??
 
-- Added: metrics. If run with the `--export :2112` flag (`:2112` is a port),
-  metrics are exposed as Prometheus metrics on that port and can be HTTP
-  GET-ted.  
-- Added: a battery gauge as a `power` widget; battery as a bar rather than
+### Added
+
+- Device data export via HTTP. If run with the `--export :2112` flag (`:2112`
+  is a port), metrics are exposed as Prometheus metrics on that port.
+- A battery gauge as a `power` widget; battery as a bar rather than
   a histogram.
+- Temp widget displays degree symbol (merged from BartWillems, thanks
+  also fleaz)
+
+### Fixed
+
+- Keys not controlling process widget, #59
+- The one-column bug, #62
 
 ## [3.3.2] - ??
 
-- Fixes #15, crash caused by battery widget when some accessories have batteries
-- Fixes #57, colors with dashes in the name not found.
+### Fixed
+
+- #15, crash caused by battery widget when some accessories have batteries
+- #57, colors with dashes in the name not found.
 - Also, cjbassi/gotop#127 and cjbassi/gotop#130 were released back in v3.1.0.
 
 ## [3.3.1] - 2020-02-18
diff --git a/cmd/gotop/main.go b/cmd/gotop/main.go
index 7575655..274cf29 100644
--- a/cmd/gotop/main.go
+++ b/cmd/gotop/main.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"net/http"
 	"os"
 	"os/signal"
 	"path/filepath"
@@ -14,6 +15,7 @@ import (
 
 	docopt "github.com/docopt/docopt.go"
 	ui "github.com/gizak/termui/v3"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"github.com/xxxserxxx/gotop"
 	"github.com/xxxserxxx/gotop/colorschemes"
@@ -25,7 +27,7 @@ import (
 
 const (
 	appName = "gotop"
-	version = "3.3.1"
+	version = "3.4.0"
 
 	graphHorizontalScaleDelta = 3
 	defaultUI                 = "cpu\ndisk/1 2:mem/2\ntemp\nnet procs"
@@ -41,10 +43,10 @@ var (
 	stderrLogger = log.New(os.Stderr, "", 0)
 )
 
+// TODO: Add tab completion for Linux https://gist.github.com/icholy/5314423
 // TODO: state:merge #135 linux console font (cmatsuoka/console-font)
 // TODO: state:deferred 157 FreeBSD fixes & Nvidia GPU support (kraust/master). Significant CPU use impact for NVidia changes.
 // TODO: Virtual devices from Prometeus metrics @feature
-// TODO: Export Prometheus metrics @feature
 // TODO: state:merge #167 configuration file (jrswab/configFile111)
 func parseArgs(conf *gotop.Config) error {
 	usage := `
@@ -64,6 +66,7 @@ Options:
   -B, --bandwidth=bits	  Specify the number of bits per seconds.
   -l, --layout=NAME       Name of layout spec file for the UI.  Looks first in $XDG_CONFIG_HOME/gotop, then as a path.  Use "-" to pipe.
   -i, --interface=NAME    Select network interface [default: all].
+  -x, --export=PORT       Enable metrics for export on the specified port.
 
 Several interfaces can be defined using comma separated values.
 
@@ -115,8 +118,11 @@ Colorschemes:
 	if args["--minimal"].(bool) {
 		conf.Layout = "minimal"
 	}
-	if val, _ := args["--statusbar"]; val != nil {
-		rateStr, _ := args["--rate"].(string)
+	if val, _ := args["--export"]; val != nil {
+		conf.ExportPort = val.(string)
+	}
+	if val, _ := args["--rate"]; val != nil {
+		rateStr, _ := val.(string)
 		rate, err := strconv.ParseFloat(rateStr, 64)
 		if err != nil {
 			return fmt.Errorf("invalid rate parameter")
@@ -335,7 +341,7 @@ func makeConfig() gotop.Config {
 		HelpVisible:          false,
 		UpdateInterval:       time.Second,
 		AverageLoad:          false,
-		PercpuLoad:           false,
+		PercpuLoad:           true,
 		TempScale:            w.Celsius,
 		Statusbar:            false,
 		NetInterface:         w.NET_INTERFACE_ALL,
@@ -345,6 +351,7 @@ func makeConfig() gotop.Config {
 	return conf
 }
 
+// TODO: mpd visualizer widget
 func main() {
 	// Set up default config
 	conf := makeConfig()
@@ -400,6 +407,12 @@ func main() {
 		ui.Render(bar)
 	}
 
+	if conf.ExportPort != "" {
+		go func() {
+			http.Handle("/metrics", promhttp.Handler())
+			http.ListenAndServe(conf.ExportPort, nil)
+		}()
+	}
 	eventLoop(conf, grid)
 }
 
@@ -414,7 +427,6 @@ func getLayout(conf gotop.Config) io.Reader {
 	case "battery":
 		return strings.NewReader(batteryUI)
 	default:
-		log.Printf("layout = %s", conf.Layout)
 		fp := filepath.Join(conf.ConfigDir, conf.Layout)
 		fin, err := os.Open(fp)
 		if err != nil {
diff --git a/config.go b/config.go
index 7fe2d72..fc6e521 100644
--- a/config.go
+++ b/config.go
@@ -30,6 +30,7 @@ type Config struct {
 	NetInterface   string
 	Layout         string
 	MaxLogSize     int64
+	ExportPort     string
 }
 
 func Parse(in io.Reader, conf *Config) error {
@@ -109,6 +110,8 @@ func Parse(in io.Reader, conf *Config) error {
 				return err
 			}
 			conf.MaxLogSize = int64(iv)
+		case "export":
+			conf.ExportPort = kv[1]
 		}
 	}
 
diff --git a/devices/cpu_nvidia.go b/devices/cpu_nvidia.go
deleted file mode 100644
index ff4691c..0000000
--- a/devices/cpu_nvidia.go
+++ /dev/null
@@ -1,19 +0,0 @@
-package devices
-
-import (
-	"github.com/NVIDIA/gpu-monitoring-tools/bindings/go/nvml"
-	"time"
-)
-
-func init() {
-	if nvml.Init() == nil {
-		shutdownFuncs = append(shutdownFuncs, func() { nvml.Shutdown() })
-		deviceCounts = append(deviceCounts, func(b bool) (int, error) {
-			r, e := nvml.GetDeviceCount()
-			return int(r), e
-		})
-		devicePercents = append(devicePercents, func(t time.Duration, b bool) ([]float64, error) {
-			return nil, nil
-		})
-	}
-}
diff --git a/devices/devices.go b/devices/devices.go
index dabb900..91a8815 100644
--- a/devices/devices.go
+++ b/devices/devices.go
@@ -1,9 +1,26 @@
 package devices
 
-var shutdownFuncs []func()
+import "log"
 
+var shutdownFuncs []func() error
+
+// RegisterShutdown stores a function to be called by gotop on exit, allowing
+// extensions to properly release resources.  Extensions should register a
+// shutdown function IFF the extension is using resources that need to be
+// released.  The returned error will be logged, but no other action will be
+// taken.
+func RegisterShutdown(f func() error) {
+	shutdownFuncs = append(shutdownFuncs, f)
+}
+
+// Shutdown will be called by the `main()` function if gotop is exited
+// cleanly.  It will call all of the registered shutdown functions of devices,
+// logging all errors but otherwise not responding to them.
 func Shutdown() {
 	for _, f := range shutdownFuncs {
-		f()
+		err := f()
+		if err != nil {
+			log.Print(err)
+		}
 	}
 }
diff --git a/docs/extensions.md b/docs/extensions.md
new file mode 100644
index 0000000..b88f63f
--- /dev/null
+++ b/docs/extensions.md
@@ -0,0 +1,22 @@
+% Plugins
+
+
+# Extensions
+
+- Plugins will supply an `Init()` function that will call the appropriate
+  `Register\*()` functions in the `github.com/xxxserxxx/gotop/devices` package.
+- `devices` will supply:
+    - RegisterCPU (opt)
+        - Counts (req)
+        - Percents (req)
+    - RegisterMem (opt)
+    - RegisterTemp (opt)
+    - RegisterShutdown (opt)
+
+# gotop
+
+- Command line -P, comma separated list of plugin .so
+- gotop will look in `pwd` and then in \$XDG_CONFIG_HOME/gotop
+- When loaded, gotop will call lib#Init()
+
+When exited cleanly, gotop will call all registered shutdown functions.
diff --git a/docs/grid-fill.md b/docs/grid-fill.md
new file mode 100644
index 0000000..554b524
--- /dev/null
+++ b/docs/grid-fill.md
@@ -0,0 +1,42 @@
+T is max height in row
+S(T) is all widgets with height T
+R(T) is all widgets with height < T
+X is len(R) > 0 ? 1 : 0
+C is len(S) + X
+Make row
+Make C columns
+Place S
+Recurse with R; place result
+
+
+ 1         2          3       4          5
+cpu/2...............  mem/1.  6:procs/2..........
+3:temp/1.  2:disk/2.........  |..................
+|........  |................  |..................
+|........  power/2..........  |..................
+net/2...............  batt..  |..................
+
+ 1         2          3       4          5
+cpu/2...............  6:procs/2........  mem/1...
+2:disk/2............  |................  3:temp/1   
+|...................  |................  |.......
+power/2.............  |................  |.......
+net/2...............  |................  batt
+
+ 1         2          3       4          5
+1x2.................  3x2..............  1x1.....    221    221
+2x2.................  |||||||||||||||||  3x1.....    21     2x1
+||||||||||||||||||||  |||||||||||||||||  ||||||||           
+1x1......  1x1......  1x2..............  1x1.....    1121
+1x2.................  1x2..............  ||||||||    22     22x
+1x1......  1x4...................................    14     
+
+initial columns = initial row
+fill
+	pattern for row
+	does pattern fit columns?
+		yes: place widgets
+		no: new row w/ new columns; fill
+
+does fit
+	cw < patt_c_w
diff --git a/docs/releasing.md b/docs/releasing.md
new file mode 100644
index 0000000..540c950
--- /dev/null
+++ b/docs/releasing.md
@@ -0,0 +1,37 @@
+Current steps for a release:
+
+### gotop
+1. Update Version in main.go 
+2. Update CHANGELOG.md
+3. Tag
+4. Push everything
+5. ./make.sh
+6. Create github release
+
+### Homebrew
+1. Change homebrew-gotop
+```
+curl --output - -L https://github.com/xxxserxxx/gotop/releases/download/v3.3.2/gotop_3.3.2_linux_amd64.tgz | sha256sum
+curl --output - -L https://github.com/xxxserxxx/gotop/releases/download/v3.3.2/gotop_3.3.2_darwin_amd64.tgz | sha256sum
+```
+
+### AUR
+1.  Update aur/PKGBUILD
+2.  namcap PKGBUILD
+3.  makepkg
+4.  makepkg -g
+5.  makepkg --printsrcinfo \> .SRCINFO
+6.  Commit everything
+7.  push
+```
+curl -L https://github.com/xxxserxxx/gotop/archive/v3.3.2.tar.gz | sha256sum
+```
+
+### AUR-BIN
+1.  Update aur-bin/PKGBUILD
+2.  namcap PKGBUILD
+3.  makepkg
+4.  makepkg -g
+5.  makepkg --printsrcinfo \> .SRCINFO
+6.  Commit everything
+7.  push aur-bin
diff --git a/go.mod b/go.mod
index 4af5838..01d66ea 100644
--- a/go.mod
+++ b/go.mod
@@ -13,7 +13,7 @@ require (
 	github.com/mailru/easyjson v0.7.1 // indirect
 	github.com/mattn/go-runewidth v0.0.4
 	github.com/mitchellh/go-wordwrap v1.0.0 // indirect
-	github.com/prometheus/client_golang v1.4.1 // indirect
+	github.com/prometheus/client_golang v1.4.1
 	github.com/rai-project/config v0.0.0-20190926180509-3bd01e698aad // indirect
 	github.com/rai-project/logger v0.0.0-20190701163301-49978a80bf96 // indirect
 	github.com/rai-project/nvidia-smi v0.0.0-20190730061239-864eb441c9ae
diff --git a/go.sum b/go.sum
index 26eae29..dea0dac 100644
--- a/go.sum
+++ b/go.sum
@@ -1,24 +1,18 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/GeertJohan/go-sourcepath v0.0.0-20150925135350-83e8b8723a9b h1:D4H5C4VvURnduTQydyEhA6OWnNcZTLUlNX4YBw5yelY=
 github.com/GeertJohan/go-sourcepath v0.0.0-20150925135350-83e8b8723a9b/go.mod h1:X/dh6iyBHZUR+NSNoO9isIl7cRw4n09jwjK5tfr+Rno=
 github.com/GeertJohan/go.incremental v1.0.0/go.mod h1:6fAjUhbVuX1KcMD3c8TEgVUqmo4seqhv0i0kdATSkM0=
 github.com/GeertJohan/go.rice v0.0.0-20170420135705-c02ca9a983da/go.mod h1:DgrzXonpdQbfN3uYaGz1EG4Sbhyum/MMIn6Cphlh2bw=
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 github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtixis4Tib9if0=
 github.com/NVIDIA/gpu-monitoring-tools v0.0.0-20200116003318-021662a21098 h1:9qTpKR5TnUxu+ViqhxkpANee27meaoHYwV0f1SnRqgI=
 github.com/NVIDIA/gpu-monitoring-tools v0.0.0-20200116003318-021662a21098/go.mod h1:nMOvShGpWaf0bXwXmeu4k+O4uziuaEI8pWzIj3BUrOA=
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 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
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 github.com/Unknwon/com v0.0.0-20151008135407-28b053d5a292/go.mod h1:KYCjqMOeHpNuTOiFQU6WEcTG7poCJrUs0YgyHNtn1no=
 github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
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 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -29,38 +23,25 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd h1:XtfPmj9tQRilnrEmI1HjQhxXWRhEM+m8CACtaMJE/kM=
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 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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@@ -68,84 +49,58 @@ github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2
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@@ -158,16 +113,12 @@ github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d/go.mod h1:IuKpRQcYE
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@@ -187,70 +138,43 @@ github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R
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@@ -259,7 +183,6 @@ golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73r
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-golang.org/x/net v0.0.0-201