Generate crash report txt and webpage

The last 100 lines of logs are now cached, and when a crash occurs, they
are saved to a file in the temp directory ("/tmp" on *nix), and pretty
HTML version is also created and opened in the browser.
* Currently only handles panics, will be included in more places soon
* Copy button and button to generate a GH issue will be added

Makefile

@@ -107,12 +107,17 @@ bundle-css:
 	-mkdir -p $(DATA)/web/css
 	$(info bundling css)
 	$(ESBUILD) --bundle css/base.css --outfile=$(DATA)/web/css/bundle.css --external:remixicon.css --minify
+	cp html/crash.html $(DATA)/crash.html
+	npx uncss $(DATA)/crash.html --csspath web/css --output $(DATA)/bundle.css
+	bash -c 'cd $(DATA); npx inline-css-cli -i crash.html -o crash.html'
+	rm $(DATA)/bundle.css
 
 copy:
 	$(info copying fonts)
 	cp -r node_modules/remixicon/fonts/remixicon.css node_modules/remixicon/fonts/remixicon.woff2 $(DATA)/web/css/
 	$(info copying html)
 	cp -r html $(DATA)/
+	mv $(DATA)/crash.html $(DATA)/html/
 	$(info copying static data)
 	-mkdir -p $(DATA)/web
 	cp -r static/* $(DATA)/web/

css/base.css

@@ -521,3 +521,15 @@ img.img-circle {
     display: flex !important;
     align-items: center;
 }
+
+div.card:contains(section.banner.footer) {
+    padding-bottom: 0px;
+}
+
+.card.sectioned {
+    padding: 0px;
+}
+
+.card.sectioned .section {
+    padding: var(--spacing-4, 1rem);
+}

exit.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"html/template"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/pkg/browser"
+)
+
+// Exit dumps the last 100 lines of output to a crash file in /tmp (or equivalent), and generates a prettier HTML file containing it that is opened in the browser if possible.
+func Exit(err interface{}) {
+	tmpl, err2 := template.ParseFS(localFS, "html/crash.html", "html/header.html")
+	if err2 != nil {
+		log.Fatalf("Failed to load template: %v", err)
+	}
+	logCache := lineCache.String()
+	data := map[string]interface{}{
+		"Log": logCache,
+	}
+	if err != nil {
+		data["Err"] = err
+	}
+	fpath := filepath.Join(temp, "jfa-go-crash-"+time.Now().Local().Format("2006-01-02T15:04:05"))
+	err2 = os.WriteFile(fpath+".txt", []byte(logCache), 0666)
+	if err2 != nil {
+		log.Fatalf("Failed to write crash dump file: %v", err2)
+	}
+	f, err2 := os.OpenFile(fpath+".html", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
+	if err2 != nil {
+		log.Fatalf("Failed to open crash dump file: %v", err2)
+	}
+	defer f.Close()
+	err2 = tmpl.Execute(f, data)
+	if err2 != nil {
+		log.Fatalf("Failed to execute template: %v", err2)
+	}
+	browser.OpenFile(fpath + ".html")
+}

go.mod

@@ -10,6 +10,8 @@ replace github.com/hrfee/jfa-go/ombi => ./ombi
 
 replace github.com/hrfee/jfa-go/logger => ./logger
 
+replace github.com/hrfee/jfa-go/linecache => ./linecache
+
 require (
 	github.com/bwmarrin/discordgo v0.23.2
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
@@ -29,6 +31,7 @@ require (
 	github.com/google/uuid v1.1.2 // indirect
 	github.com/hrfee/jfa-go/common v0.0.0-20210105184019-fdc97b4e86cc
 	github.com/hrfee/jfa-go/docs v0.0.0-20201112212552-b6f3cd7c1f71
+	github.com/hrfee/jfa-go/linecache v0.0.0-00010101000000-000000000000 // indirect
 	github.com/hrfee/jfa-go/logger v0.0.0-00010101000000-000000000000
 	github.com/hrfee/jfa-go/ombi v0.0.0-20201112212552-b6f3cd7c1f71
 	github.com/hrfee/mediabrowser v0.3.4
@@ -38,6 +41,7 @@ require (
 	github.com/mailgun/mailgun-go/v4 v4.5.1
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/matrix-org/gomatrix v0.0.0-20210324163249-be2af5ef2e16
+	github.com/pkg/browser v0.0.0-20210606212950-a7b7a6107d32 // indirect
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
 	github.com/smartystreets/goconvey v1.6.4 // indirect
 	github.com/swaggo/files v0.0.0-20190704085106-630677cd5c14

go.sum

@@ -1,4 +1,6 @@
+cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ=
 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/KyleBanks/depth v1.2.1 h1:5h8fQADFrWtarTdtDudMmGsC7GPbOAu6RVB3ffsVFHc=
 github.com/KyleBanks/depth v1.2.1/go.mod h1:jzSb9d0L43HxTQfT+oSA1EEp2q+ne2uh6XgeJcm8brE=
@@ -11,19 +13,26 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafo
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/bwmarrin/discordgo v0.23.2 h1:BzrtTktixGHIu9Tt7dEE6diysEF9HWnXeHuoJEt2fH4=
 github.com/bwmarrin/discordgo v0.23.2/go.mod h1:c1WtWUGN6nREDmzIpyTp/iD3VYt4Fpx+bVyfBG7JE+M=
+github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 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/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/elazarl/go-bindata-assetfs v1.0.0 h1:G/bYguwHIzWq9ZoyUQqrjTmJbbYn3j3CKKpKinvZLFk=
 github.com/elazarl/go-bindata-assetfs v1.0.0/go.mod h1:v+YaWX3bdea5J/mo8dSETolEo7R71Vk1u8bnjau5yw4=
 github.com/emersion/go-autostart v0.0.0-20210130080809-00ed301c8e9a h1:M88ob4TyDnEqNuL3PgsE/p3bDujfspnulR+0dQWNYZs=
 github.com/emersion/go-autostart v0.0.0-20210130080809-00ed301c8e9a/go.mod h1:buzQsO8HHkZX2Q45fdfGH1xejPjuDQaXH8btcYMFzPM=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473 h1:4cmBvAEBNJaGARUEs3/suWRyfyBfhf7I60WBZq+bv2w=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/protoc-gen-validate v0.1.0 h1:EQciDnbrYxy13PgWoY8AqoxGiPrpgBZ1R8UNe3ddc+A=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51 h1:0JZ+dUmQeA8IIVUMzysrX4/AKuQwWhV2dYQuPZdvdSQ=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
@@ -49,6 +58,7 @@ github.com/getlantern/ops v0.0.0-20190325191751-d70cb0d6f85f h1:wrYrQttPS8FHIRSl
 github.com/getlantern/ops v0.0.0-20190325191751-d70cb0d6f85f/go.mod h1:D5ao98qkA6pxftxoqzibIBBrLSUli+kYnJqrgBf9cIA=
 github.com/getlantern/systray v1.1.0 h1:U0wCEqseLi2ok1fE6b88gJklzriavPJixZysZPkZd/Y=
 github.com/getlantern/systray v1.1.0/go.mod h1:AecygODWIsBquJCJFop8MEQcJbWFfw/1yWbVabNgpCM=
+github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gin-contrib/gzip v0.0.1 h1:ezvKOL6jH+jlzdHNE4h9h8q8uMpDQjyl0NN0Jd7jozc=
 github.com/gin-contrib/gzip v0.0.1/go.mod h1:fGBJBCdt6qCZuCAOwWuFhBB4OOq9EFqlo5dEaFhhu5w=
@@ -105,7 +115,9 @@ github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-telegram-bot-api/telegram-bot-api v4.6.4+incompatible h1:2cauKuaELYAEARXRkq2LrJ0yDDv1rW7+wrTEdVL3uaU=
 github.com/go-telegram-bot-api/telegram-bot-api v4.6.4+incompatible/go.mod h1:qf9acutJ8cwBUhm1bqgz6Bei9/C/c93FPDljKWwsOgM=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/mock v1.1.1 h1:G5FRp8JnTd7RQH5kemVNlMeyXQAztQ3mOWV95KxsXH8=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -127,6 +139,7 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
@@ -153,8 +166,10 @@ github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr
 github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/pty v1.1.5 h1:hyz3dwM5QLc1Rfoz4FuWJQG5BN7tc6K1MndAUnGpQr4=
 github.com/kr/pty v1.1.5/go.mod h1:9r2w37qlBe7rQ6e1fg1S/9xpWHSnaqNdHD3WcMdbPDA=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
@@ -192,13 +207,19 @@ github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWb
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c h1:rp5dCmg/yLR3mgFuSOe4oEnDDmGLROTvMragMUXpTQw=
 github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c/go.mod h1:X07ZCGwUbLaax7L0S3Tw4hpejzu63ZrrQiUe6W0hcy0=
+github.com/pkg/browser v0.0.0-20210606212950-a7b7a6107d32 h1:K3WnH8Ka32vWygzmjKEhz1zAVqckNoWDqX3azMxuiSA=
+github.com/pkg/browser v0.0.0-20210606212950-a7b7a6107d32/go.mod h1:yvwcBfzEX4m+eTgxPBbNYytaWFv4PSQzBaeYjxp8Iik=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 h1:gQz4mCbXsO+nc9n1hCxHcGA3Zx3Eo+UHZoInFGUIXNM=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/satori/go.uuid v1.2.0 h1:0uYX9dsZ2yD7q2RtLRtPSdGDWzjeM3TbMJP9utgA0ww=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 h1:JIAuq3EEf9cgbU6AtGPK4CTG3Zf6CKMNqf0MHTggAUA=
 github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966/go.mod h1:sUM3LWHvSMaG192sy56D9F7CNvL7jUJVXoqM1QKLnog=
@@ -207,6 +228,7 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1
 github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
 github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=
 github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
@@ -236,13 +258,17 @@ github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLY
 github.com/ugorji/go/codec v1.1.13/go.mod h1:oNVt3Dq+FO91WNQ/9JnHKQP2QJxTzoN7wCBFCq1OeuU=
 github.com/ugorji/go/codec v1.2.0 h1:As6RccOIlbm9wHuWYMlB30dErcI+4WiKWsYsmPkyrUw=
 github.com/ugorji/go/codec v1.2.0/go.mod h1:dXvG35r7zTX6QImXOSFhGMmKtX+wJ7VTWzGvYQGIjBs=
+github.com/urfave/cli v1.20.0 h1:fDqGv3UG/4jbVl/QkFwEdddtEDjh/5Ov6X+0B/3bPaw=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/urfave/cli/v2 v2.1.1/go.mod h1:SE9GqnLQmjVa0iPEY0f1w3ygNIYcIJ0OKPMoW2caLfQ=
+github.com/urfave/cli/v2 v2.3.0 h1:qph92Y649prgesehzOrQjdWyxFOp/QVM+6imKHad91M=
 github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
 github.com/writeas/go-strip-markdown v2.0.1+incompatible h1:IIqxTM5Jr7RzhigcL6FkrCNfXkvbR+Nbu1ls48pXYcw=
 github.com/writeas/go-strip-markdown v2.0.1+incompatible/go.mod h1:Rsyu10ZhbEK9pXdk8V6MVnZmTzRG0alMNLMwa0J01fE=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.3.5 h1:dPmz1Snjq0kmkz159iL7S6WzdahUTHnHB5M56WFVifs=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+golang.org/dl v0.0.0-20190829154251-82a15e2f2ead h1:jeP6FgaSLNTMP+Yri3qjlACywQLye+huGLmNGhBzm6k=
 golang.org/dl v0.0.0-20190829154251-82a15e2f2ead/go.mod h1:IUMfjQLJQd4UTqG1Z90tenwKoCX93Gn3MAQJMOSBsDQ=
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -251,9 +277,11 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201112155050-0c6587e931a9 h1:umElSU9WZirRdgu2yFHY0ayQkEnKiOC1TtM3fWXFnoU=
 golang.org/x/crypto v0.0.0-20201112155050-0c6587e931a9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/exp v0.0.0-20190121172915-509febef88a4 h1:c2HOrn5iMezYjSlGPncknSEr/8x5LELb/ilJbXi9DEA=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
+golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3 h1:XQyxROzUlZH+WIQwySDgnISgOivlhjIEwaQaJEJrrN0=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
@@ -276,12 +304,14 @@ golang.org/x/net v0.0.0-20210119194325-5f4716e94777/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5 h1:wjuX4b5yYQnEQHzd+CBcrcC6OVR2J1CN6mUy0oSxIPo=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be h1:vEDujvNQGv4jgYKudGeI/+DAX4Jffq6hpD55MmoEvKs=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -297,11 +327,13 @@ golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210319071255-635bc2c9138d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210531080801-fdfd190a6549 h1:OL5GcZ2XPkte3dpfuFQ9o884vrE3BZQhajdntNMruv4=
 golang.org/x/sys v0.0.0-20210531080801-fdfd190a6549/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
@@ -329,12 +361,15 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.27.0 h1:rRYRFMVgRv6E0D70Skyfsr28tDXIuuPZyWGMPdMcnXg=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
@@ -350,8 +385,11 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/go-playground/assert.v1 v1.2.1 h1:xoYuJVE7KT85PYWrN730RguIQO0ePzVRfFMXadIrXTM=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
+gopkg.in/go-playground/validator.v8 v8.18.2 h1:lFB4DoMU6B626w8ny76MV7VX6W2VHct2GVOI3xgiMrQ=
 gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
+gopkg.in/go-playground/validator.v9 v9.29.1 h1:SvGtYmN60a5CVKTOzMSyfzWDeZRxRuGvRQyEAKbw1xc=
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
 gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
@@ -366,4 +404,5 @@ gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 h1:tQIYjPdBoyREyB9XMu+nnTclpTYkz2zFM+lzLJFO4gQ=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc h1:/hemPrYIhOhy8zYrNj+069zDB68us2sMGsfkFJO0iZs=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

html/crash.html

@@ -0,0 +1,31 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <link rel="stylesheet" type="text/css" href="bundle.css">
+        {{ template "header.html" . }}
+        <title>Crash report</title>
+    </head>
+    <body>
+        <div class="page-container">
+            <div class="row">
+                <div class="col">
+                    <div class="card ~critical sectioned">
+                        <section class="section ~critical">
+                            <span class="heading">Crash report for jfa-go</span>
+                            {{ if .Err }}
+                            <div class="monospace pre-line mt-1 mb-1">
+                            Error: {{ .Err }}
+                            </div>
+                            {{ end }}
+                            <a class="button ~critical mb-1" target="_blank" href="https://github.com/hrfee/jfa-go/issues/new/choose">Create an Issue</a>
+                        </section>
+                        <section class="section ~neutral !low">
+                            <span class="subheading">Full Log</span>
+                            <pre class="monospace pre-line">{{ .Log }}</pre>
+                        </section>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </body>
+</html>

linecache/go.mod

@@ -0,0 +1,3 @@
+module github.com/hrfee/jfa-go/linecache
+
+go 1.16

linecache/linecache.go

@@ -0,0 +1,66 @@
+// Package linecache provides a writer that stores n lines of text at once, overwriting old content as it reaches its capacity. Its contents can be read from with a String() method.
+package linecache
+
+import (
+	"strings"
+	"sync"
+)
+
+// LineCache provides an io.Writer that stores a fixed number of lines of text.
+type LineCache struct {
+	count   int
+	lines   [][]byte
+	current int
+	lock    *sync.Mutex
+}
+
+// NewLineCache returns a new line cache of capacity (n) lines.
+func NewLineCache(n int) *LineCache {
+	return &LineCache{
+		current: 0,
+		count:   n,
+		lines:   make([][]byte, n),
+		lock:    &sync.Mutex{},
+	}
+}
+
+// Write writes a given byte array to the cache.
+func (l *LineCache) Write(p []byte) (n int, err error) {
+	l.lock.Lock()
+	defer l.lock.Unlock()
+	lines := strings.Split(string(p), "\n")
+	for _, line := range lines {
+		if string(line) == "" {
+			continue
+		}
+		if l.current == l.count {
+			l.current = 0
+		}
+		l.lines[l.current] = []byte(line)
+		l.current++
+	}
+	n = len(p)
+	return
+}
+
+// String returns a string representation of the cache contents.
+func (l *LineCache) String() string {
+	i := 0
+	if l.lines[l.count-1] != nil && l.current != l.count {
+		i = l.current
+	}
+	out := ""
+	for {
+		if l.lines[i] == nil {
+			return out
+		}
+		out += string(l.lines[i]) + "\n"
+		i++
+		if i == l.current {
+			return out
+		}
+		if i == l.count {
+			i = 0
+		}
+	}
+}

linecache/linecache_test.go

@@ -0,0 +1,17 @@
+package linecache
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+)
+
+func Test(t *testing.T) {
+	wr := NewLineCache(10)
+	for i := 10; i < 50; i++ {
+		fmt.Fprintln(wr, i)
+		fmt.Print(strings.ReplaceAll(wr.String(), "\n", " "), "\n")
+		time.Sleep(time.Second)
+	}
+}

log.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	"github.com/gin-gonic/gin"
+	"github.com/hrfee/jfa-go/linecache"
+)
+
+var logPath string = filepath.Join(temp, "jfa-go.log")
+var lineCache = linecache.NewLineCache(100)
+
+func logOutput() (closeFunc func()) {
+	old := os.Stdout
+	log.Printf("Logging to \"%s\"", logPath)
+	writers := []io.Writer{old, colorStripper{lineCache}}
+	wExit := make(chan bool)
+	r, w, _ := os.Pipe()
+	if TRAY {
+		f, err := os.OpenFile(logPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
+		if err != nil {
+			closeFunc = func() {}
+			return
+		}
+		writers = append(writers, colorStripper{f})
+		closeFunc = func() {
+			w.Close()
+			<-wExit
+			f.Close()
+		}
+	} else {
+		closeFunc = func() {
+			w.Close()
+			<-wExit
+		}
+	}
+	writer := io.MultiWriter(writers...)
+	os.Stdout, os.Stderr = w, w
+	log.SetOutput(writer)
+	gin.DefaultWriter, gin.DefaultErrorWriter = writer, writer
+	go func() {
+		io.Copy(writer, r)
+		wExit <- true
+	}()
+	return
+}
+
+// Regex that removes ANSI color escape sequences. Used for outputting to log file and log cache.
+var stripColors = func() *regexp.Regexp {
+	r, err := regexp.Compile("\\x1b\\[[0-9;]*m")
+	if err != nil {
+		log.Fatalf("Failed to compile color escape regexp: %v", err)
+	}
+	return r
+}()
+
+type colorStripper struct {
+	file io.Writer
+}
+
+func (c colorStripper) Write(p []byte) (n int, err error) {
+	_, err = c.file.Write(stripColors.ReplaceAll(p, []byte("")))
+	n = len(p)
+	return
+}

main.go

@@ -6,7 +6,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"io"
 	"io/fs"
 	"log"
 	"mime"
@@ -21,7 +20,6 @@ import (
 	"time"
 
 	"github.com/fatih/color"
-	"github.com/gin-gonic/gin"
 	"github.com/hrfee/jfa-go/common"
 	_ "github.com/hrfee/jfa-go/docs"
 	"github.com/hrfee/jfa-go/logger"
@@ -61,8 +59,6 @@ var temp = func() string {
 	return temp
 }()
 
-var logPath string = filepath.Join(temp, "jfa-go.log")
-
 var serverTypes = map[string]string{
 	"jellyfin": "Jellyfin",
 	"emby":     "Emby (experimental)",
@@ -644,34 +640,13 @@ func printVersion() {
 	fmt.Println(info("jfa-go version: %s (%s)%s\n", hiwhite(version), white(commit), tray))
 }
 
-func logOutput() func() {
-	old := os.Stdout
-	log.Printf("Logging to \"%s\"", logPath)
-	f, err := os.OpenFile(logPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
-	if err != nil {
-		return func() {}
-	}
-	writer := io.MultiWriter(old, f)
-	r, w, _ := os.Pipe()
-	os.Stdout, os.Stderr = w, w
-	log.SetOutput(writer)
-	gin.DefaultWriter, gin.DefaultErrorWriter = writer, writer
-	wExit := make(chan bool)
-	go func() {
-		io.Copy(writer, r)
-		wExit <- true
-	}()
-	return func() {
-		w.Close()
-		<-wExit
-		f.Close()
-	}
-}
-
 func main() {
-	if TRAY {
+	defer func() {
-		defer logOutput()()
+		if r := recover(); r != nil {
-	}
+			Exit(r)
+		}
+	}()
+	defer logOutput()()
 	printVersion()
 	SOCK = filepath.Join(temp, SOCK)
 	fmt.Println("Socket:", SOCK)

package.json

@@ -22,10 +22,12 @@
     "a17t": "^0.4.0",
     "browserslist": "^4.16.6",
     "esbuild": "^0.8.57",
+    "inline-css-cli": "^0.0.1",
     "lodash": "^4.17.21",
     "mjml": "^4.8.0",
     "remixicon": "^2.5.0",
     "remove-markdown": "^0.3.0",
-    "typescript": "^4.0.3"
+    "typescript": "^4.0.3",
+    "uncss": "^0.17.3"
   }
 }