├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── checkConfig ├── go.mod ├── go.sum ├── goblocks.go ├── goblocks.json └── util ├── builtins.go └── utils.go /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store 2 | .idea 3 | *.log 4 | tmp/ 5 | goblocks 6 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | 294 | Copyright (C) 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | , 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | ## 2 | # 3 | # @file 4 | # @version 1.0 5 | build: config 6 | go build goblocks.go 7 | 8 | config: 9 | ./checkConfig 10 | 11 | install: build 12 | sudo cp -f goblocks /usr/local/bin/goblocks; \ 13 | sudo chmod 755 /usr/local/bin/goblocks 14 | 15 | uninstall: 16 | sudo rm -f /usr/local/bin/goblocks 17 | rm -f ${HOME}/.config/goblocks.json 18 | 19 | run: build 20 | ./goblocks 21 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Goblocks 2 | Goblocks is a [dwm](https://dwm.suckless.org/) status bar program partially inspired by [dwmblocks](https://github.com/torrinfail/dwmblocks). 3 | 4 | ![Goblocks in action](https://i.imgur.com/kH1G8tr.png) 5 | 6 | It is lightweight, fast, multithreaded, well(-ish) documented and easily customizable. It is also one of very few status bars done correctly. Most of them "naively" 7 | scan for changes every 1s or so, whereas goblocks only updates when there are updates to be done. 8 | 9 | ## Installation 10 | Pull this repo and run: 11 | ``` 12 | make install 13 | ``` 14 | This will build this project and generate default config file at $HOME/.config/goblocks.json. After that you can simply run it with 15 | ``` 16 | goblocks &! 17 | ``` 18 | 19 | If you want to uninstall it, just run. 20 | ``` 21 | make uninstall 22 | ``` 23 | 24 | 25 | ## Customization 26 | You can add your own blocks in [config file](https://github.com/Stargarth/Goblocks/blob/master/goblocks.json). Just remember to modify config at ~/.config/ 27 | goblocks.json. 28 | After you have applied your changes, just re run the aplication. 29 | 30 | In order to add new block to the bar add new action object to actions array in goblocks.json: 31 | ``` 32 | "actions": 33 | [ 34 | { 35 | "prefix": "🗓 ", 36 | "updateSignal": "35", 37 | "command": "#Date", 38 | "format": "Monday 02/01/2006 15:04:05", 39 | "timer": "1s" 40 | }, 41 | { 42 | "prefix": "🔊 ", 43 | "updateSignal": "36", 44 | "command": "amixer get Master | awk ' \/%\/ {print $5 $6}' | head -1 | sed -e 's\/]\\[\/ \/g'", 45 | "timer": "0" 46 | }, 47 | { 48 | "prefix": "Mem: ", 49 | "updateSignal": "37", 50 | "command": "#Memory", 51 | "suffix": "%", 52 | "format": "%.2f", 53 | "timer": "2s" 54 | }, 55 | { 56 | "prefix": "CPU: ", 57 | "updateSignal": "38", 58 | "command": "#Cpu", 59 | "suffix": "%", 60 | "format": "%.2f", 61 | "timer": "2s" 62 | } 63 | ] 64 | ``` 65 | ### Config properties 66 | 1. **prefix(optional)**:text that will be displayed before the output of command. 67 | 2. **updateSignal**: signal that can be sent to goblocks to re-run the command and refresh output in bar. This value must be in range 34-64 inclusive. 68 | 3. **command**: functionality that will produce the text for status bar. If it starts with hash-tag goblocks will try to invoke corresponding built-in function. 69 | If it doesn't then goblocks will run command in shell(sh) and put it's output in status bar. 70 | 4. **suffix(optional)**: Text that will be displayed after the output of command 71 | 5. **Timer**: Time period after which command is being re-run and text in status bar refreshed. s for seconds(1s), m for minutes(1m), h for hours(1h). 72 | When set to 0 the block will only update at startup and when **updateSignal** is sent to goblocks. 73 | 74 | ### Signaling Blocks 75 | Blocks can be updated immediately by sending the corresponding **updateSignal** to the goblocks process. 76 | For example, `kill -35 $(pidof goblocks)` will update the block with **updateSignal** 35. 77 | Alternatively, you can signal a block with `pkill -RTMIN+ goblocks` where `x` is the **updateSignal** minus 34. 78 | So `pkill -RTMIN+1 goblocks` will update blocks with **updateSignal** 35. 79 | 80 | > Note if multiple blocks are assigned the same **updateSignal** only the first will be updated. 81 | 82 | ## Miscellaneous 83 | ### Formating date with #Date built in program 84 | Format a reference layout parameter (**Mon Jan 2 15:04:05 MST 2006**) in a way that you would like to have your time formatted. 85 | If you have trouble check out this [guideline](https://www.golangprograms.com/get-current-date-and-time-in-various-format-in-golang.html). 86 | ### Escape sh commands 87 | Some sh commands have characters (e.g. \\) which have a special meaning in JSON format. To easily escape them just dump your sh commands to 88 | [json formatter](https://www.freeformatter.com/json-escape.html). 89 | ### TODO 90 | 1. ~~Create a block that displays weather condition.~~ Done 91 | 2. ~~Add implementation documentation~~ Code is pretty readable and has comments. This should be enough 92 | 3. Add support for colour text in blocks. 93 | 94 | ## Feedback 95 | Your feedback is more than welcome and if you have some questions/issues/feature ideas just post them on 96 | [issues page](https://github.com/Stargarth/Goblocks/issues). 97 | -------------------------------------------------------------------------------- /checkConfig: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | if test -f "$HOME/.config/goblocks.json"; then 3 | echo "config exists" 4 | else 5 | cp "goblocks.json" "$HOME/.config/goblocks.json" 6 | echo "Copied default config" 7 | fi 8 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module goblocks 2 | 3 | go 1.14 4 | 5 | require ( 6 | github.com/BurntSushi/xgb v0.0.0-20201008132610-5f9e7b3c49cd // indirect 7 | github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect 8 | github.com/go-ole/go-ole v1.2.4 // indirect 9 | github.com/shirou/gopsutil v2.20.5+incompatible 10 | github.com/stretchr/testify v1.6.1 // indirect 11 | golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae // indirect 12 | ) 13 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | github.com/BurntSushi/xgb v0.0.0-20201008132610-5f9e7b3c49cd h1:u7K2oMFMd8APDV3fM1j2rO3U/XJf1g1qC3DDTKou8iM= 2 | github.com/BurntSushi/xgb v0.0.0-20201008132610-5f9e7b3c49cd/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo= 3 | github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d h1:G0m3OIz70MZUWq3EgK3CesDbo8upS2Vm9/P3FtgI+Jk= 4 | github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg= 5 | github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= 6 | github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 7 | github.com/go-ole/go-ole v1.2.4 h1:nNBDSCOigTSiarFpYE9J/KtEA1IOW4CNeqT9TQDqCxI= 8 | github.com/go-ole/go-ole v1.2.4/go.mod h1:XCwSNxSkXRo4vlyPy93sltvi/qJq0jqQhjqQNIwKuxM= 9 | github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= 10 | github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= 11 | github.com/shirou/gopsutil v2.20.5+incompatible h1:tYH07UPoQt0OCQdgWWMgYHy3/a9bcxNpBIysykNIP7I= 12 | github.com/shirou/gopsutil v2.20.5+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA= 13 | github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= 14 | github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0= 15 | github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= 16 | golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo= 17 | golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 18 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= 19 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 20 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= 21 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= 22 | -------------------------------------------------------------------------------- /goblocks.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "goblocks/util" 5 | "log" 6 | "os" 7 | "strings" 8 | "github.com/BurntSushi/xgb" 9 | "github.com/BurntSushi/xgb/xproto" 10 | ) 11 | 12 | var ( 13 | blocks []string 14 | channels []chan bool 15 | signalMap map[string]int = make(map[string]int) 16 | ) 17 | 18 | func main() { 19 | // establish connection to X server 20 | x, err := xgb.NewConn() 21 | if err != nil { 22 | log.Fatal(err) 23 | } 24 | defer x.Close() 25 | root := xproto.Setup(x).DefaultScreen(x).Root 26 | 27 | config := util.ReadConfig("goblocks.json") 28 | channels = make([]chan bool, len(config.Actions)) 29 | //recChannel is common for gothreads contributing to status bar 30 | recChannel := make(chan util.Change) 31 | for i, action := range config.Actions { 32 | //Assign a cell for each separator/prefix/action/suffix 33 | if config.Separator != "" { 34 | blocks = append(blocks, config.Separator) 35 | } 36 | if value, ok := action["prefix"]; ok { 37 | blocks = append(blocks, value.(string)) 38 | } 39 | blocks = append(blocks, "action") 40 | actionId := len(blocks) - 1 41 | if value, ok := action["suffix"]; ok { 42 | blocks = append(blocks, value.(string)) 43 | } 44 | //Create an unique channel for each action 45 | channels[i] = make(chan bool) 46 | signalMap["signal "+action["updateSignal"].(string)] = i 47 | if (action["command"].(string))[0] == '#' { 48 | go util.FunctionMap[action["command"].(string)](actionId, recChannel, channels[i], action) 49 | } else { 50 | go util.RunCmd(actionId, recChannel, channels[i], action) 51 | } 52 | timer := action["timer"].(string) 53 | if timer != "0" { 54 | go util.Schedule(channels[i], timer) 55 | } 56 | } 57 | go handleSignals(util.GetSIGRTchannel()) 58 | //start event loop 59 | for { 60 | //Block until some gothread has an update 61 | res := <-recChannel 62 | if res.Success { 63 | blocks[res.BlockId] = res.Data 64 | } else { 65 | log.Println(res.Data) 66 | blocks[res.BlockId] = "ERROR" 67 | } 68 | updateBar(x, root) 69 | } 70 | } 71 | //Goroutine that pings a channel according to received signal 72 | func handleSignals(rec chan os.Signal) { 73 | for { 74 | sig := <-rec 75 | if index, ok := signalMap[sig.String()]; ok { 76 | channels[index] <- true 77 | } 78 | } 79 | } 80 | //Craft status text out of blocks data 81 | func updateBar(conn *xgb.Conn, rootWindow xproto.Window) { 82 | var builder strings.Builder 83 | for _, s := range blocks { 84 | builder.WriteString(s) 85 | } 86 | xproto.ChangeProperty(conn, xproto.PropModeReplace, rootWindow, xproto.AtomWmName, xproto.AtomString, 8, uint32(builder.Len()), []byte(builder.String())) 87 | } 88 | -------------------------------------------------------------------------------- /goblocks.json: -------------------------------------------------------------------------------- 1 | { 2 | "separator": " | ", 3 | "actions": 4 | [ 5 | { 6 | "updateSignal": "39", 7 | "command": "(sleep 5 ; curl \"wttr.in\/London?format=3\")", 8 | "timer": "45m" 9 | }, 10 | { 11 | "prefix": "🗓 ", 12 | "updateSignal": "35", 13 | "command": "#Date", 14 | "format": "Monday 02/01/2006 15:04:05", 15 | "timer": "1s" 16 | }, 17 | { 18 | "prefix": "🔊 ", 19 | "updateSignal": "36", 20 | "command": "amixer get Master | awk ' \/%\/ {print $5 $6}' | head -1 | sed -e 's\/]\\[\/ \/g'", 21 | "timer": "0" 22 | }, 23 | { 24 | "prefix": "Mem: ", 25 | "updateSignal": "37", 26 | "command": "#Memory", 27 | "suffix": "%", 28 | "format": "%.2f", 29 | "timer": "2s" 30 | }, 31 | { 32 | "prefix": "CPU: ", 33 | "updateSignal": "38", 34 | "command": "#Cpu", 35 | "suffix": "%", 36 | "format": "%.2f", 37 | "timer": "2s" 38 | } 39 | ] 40 | 41 | } 42 | -------------------------------------------------------------------------------- /util/builtins.go: -------------------------------------------------------------------------------- 1 | package util 2 | 3 | import ( 4 | "fmt" 5 | "github.com/shirou/gopsutil/cpu" 6 | "github.com/shirou/gopsutil/mem" 7 | "time" 8 | ) 9 | 10 | //blockId is automatically allocated 11 | //send channel is used to update blocks data 12 | //Gothreads are waked up by messages on rec channels 13 | //action is a map of whatever was in action json object for corressponding action 14 | var FunctionMap = map[string]func(blockId int, send chan Change, rec chan bool, action map[string]interface{}){ 15 | "#Date": Date, 16 | "#Memory": Memory, 17 | "#Cpu": Cpu, 18 | } 19 | 20 | //Update time according to "format" property 21 | func Date(blockId int, send chan Change, rec chan bool, action map[string]interface{}) { 22 | run := true 23 | for run { 24 | send <- Change{blockId, time.Now().Format(action["format"].(string)), true} 25 | //Block until other thread will ping you 26 | run = <-rec 27 | } 28 | } 29 | 30 | //Get current % of used memory 31 | func Memory(blockId int, send chan Change, rec chan bool, action map[string]interface{}) { 32 | run := true 33 | for run { 34 | v, _ := mem.VirtualMemory() 35 | send <- Change{blockId, fmt.Sprintf(action["format"].(string), v.UsedPercent), true} 36 | //Block until other thread will ping you 37 | run = <-rec 38 | } 39 | } 40 | 41 | //Get current % of used CPU 42 | func Cpu(blockId int, send chan Change, rec chan bool, action map[string]interface{}) { 43 | run := true 44 | for run { 45 | val, _ := cpu.Percent(time.Second, false) 46 | send <- Change{blockId, fmt.Sprintf(action["format"].(string), val[0]), true} 47 | //Block until other thread will ping you 48 | run = <-rec 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /util/utils.go: -------------------------------------------------------------------------------- 1 | package util 2 | 3 | import ( 4 | "encoding/json" 5 | "io/ioutil" 6 | "log" 7 | "os" 8 | "os/exec" 9 | "os/signal" 10 | "path/filepath" 11 | "strings" 12 | "syscall" 13 | "time" 14 | ) 15 | 16 | type Change struct { 17 | BlockId int 18 | Data string 19 | Success bool 20 | } 21 | 22 | type configStruct struct { 23 | Separator string 24 | Actions []map[string]interface{} 25 | } 26 | //Based on "timer" prorty from config file 27 | //Schedule gothread that will ping other gothreads via send channel 28 | func Schedule(send chan bool, duration string) { 29 | u, err := time.ParseDuration(duration) 30 | if err == nil { 31 | for range time.Tick(u){ 32 | send <- true 33 | } 34 | } else { 35 | log.Println("Couldn't set a scheduler due to improper time format: " + duration) 36 | send <-false 37 | } 38 | } 39 | //Run any arbitrary POSIX shell command 40 | func RunCmd(blockId int, send chan Change, rec chan bool, action map[string]interface{}) { 41 | cmdStr := action["command"].(string) 42 | run := true 43 | 44 | for run { 45 | out, err := exec.Command("sh", "-c", cmdStr).Output() 46 | if err == nil { 47 | send <- Change{blockId, strings.TrimSuffix(string(out), "\n"), true} 48 | } else { 49 | send <- Change{blockId, err.Error(), false} 50 | } 51 | //Block until other thread will ping you 52 | run = <-rec 53 | } 54 | } 55 | //Create a channel that captures all 34-64 signals 56 | func GetSIGRTchannel() chan os.Signal { 57 | sigChan := make(chan os.Signal, 1) 58 | sigArr := make([]os.Signal, 31) 59 | for i := range sigArr { 60 | sigArr[i] = syscall.Signal(i + 0x22) 61 | } 62 | signal.Notify(sigChan, sigArr...) 63 | return sigChan 64 | } 65 | //Read config and map it to configStruct 66 | func ReadConfig(configName string) (config configStruct) { 67 | var confDir string 68 | confDir, err := os.UserConfigDir() 69 | if err != nil { 70 | log.Fatal(err) 71 | } 72 | 73 | var file *os.File 74 | file, err = os.Open(filepath.Join(confDir,configName)) 75 | defer file.Close() 76 | if err != nil { 77 | log.Fatal(err) 78 | } 79 | 80 | var byteValue []byte 81 | byteValue, err = ioutil.ReadAll(file) 82 | if err != nil { 83 | log.Fatal(err) 84 | } 85 | err = json.Unmarshal([]byte(byteValue), &config) 86 | if err != nil { 87 | log.Fatal(err) 88 | } 89 | return config 90 | } 91 | --------------------------------------------------------------------------------