lib/db: Add Badger backend (fixes #5910) (#6250)

This commit is contained in:
Jakob Borg 2020-05-29 12:43:02 +01:00 committed by GitHub
parent ed6bfc5417
commit 94beed5c10
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 644 additions and 9 deletions

2
go.mod
View File

@ -10,6 +10,7 @@ require (
github.com/certifi/gocertifi v0.0.0-20190905060710-a5e0173ced67 // indirect
github.com/chmduquesne/rollinghash v0.0.0-20180912150627-a60f8e7142b5
github.com/d4l3k/messagediff v1.2.1
github.com/dgraph-io/badger/v2 v2.0.3
github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568
github.com/getsentry/raven-go v0.2.0
github.com/go-ldap/ldap/v3 v3.1.10
@ -45,7 +46,6 @@ require (
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae
golang.org/x/text v0.3.2
golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
)
go 1.13

40
go.sum
View File

@ -12,6 +12,9 @@ github.com/AudriusButkevicius/pfilter v0.0.0-20190627213056-c55ef6137fc6/go.mod
github.com/AudriusButkevicius/recli v0.0.5 h1:xUa55PvWTHBm17T6RvjElRO3y5tALpdceH86vhzQ5wg=
github.com/AudriusButkevicius/recli v0.0.5/go.mod h1:Q2E26yc6RvWWEz/TJ/goUp6yXvipYdJI096hpoaqsNs=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 h1:fLjPD/aNc3UIOA6tDi6QXUemppXK3P9BI7mr2hd6gx8=
github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d h1:G0m3OIz70MZUWq3EgK3CesDbo8upS2Vm9/P3FtgI+Jk=
@ -25,6 +28,7 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRF
github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4 h1:Hs82Z41s6SdL1CELW+XaDYmOH4hkBN4/N9og/AsOv7E=
github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
@ -42,6 +46,8 @@ github.com/ccding/go-stun v0.0.0-20180726100737-be486d185f3d h1:As4937T5NVbJ/DmZ
github.com/ccding/go-stun v0.0.0-20180726100737-be486d185f3d/go.mod h1:3FK1bMar37f7jqVY7q/63k3OMX1c47pGCufzt3X0sYE=
github.com/certifi/gocertifi v0.0.0-20190905060710-a5e0173ced67 h1:8k9FLYBLKT+9v2HQJ/a95ZemmTx+/ltJcAiRhVushG8=
github.com/certifi/gocertifi v0.0.0-20190905060710-a5e0173ced67/go.mod h1:GJKEexRPVJrBSOjoqN5VNOIKJ5Q3RViH6eu3puDRwx4=
github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
github.com/cespare/xxhash/v2 v2.1.0 h1:yTUvW7Vhb89inJ+8irsUqiWjh8iT6sQPZiQzI6ReGkA=
github.com/cespare/xxhash/v2 v2.1.0/go.mod h1:dgIUBU3pDso/gPgZ1osOZ0iQf77oPR28Tjxl5dIMyVM=
github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
@ -49,7 +55,12 @@ github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wX
github.com/chmduquesne/rollinghash v0.0.0-20180912150627-a60f8e7142b5 h1:Wg96Dh0MLTanEaPO0OkGtUIaa2jOnShAIOVUIzRHUxo=
github.com/chmduquesne/rollinghash v0.0.0-20180912150627-a60f8e7142b5/go.mod h1:Uc2I36RRfTAf7Dge82bi3RU0OQUmXT9iweIcPqvr8A0=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
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/d4l3k/messagediff v1.2.1 h1:ZcAIMYsUg0EAp9X+tt8/enBE/Q8Yd5kzPynLyKptt9U=
@ -57,6 +68,14 @@ github.com/d4l3k/messagediff v1.2.1/go.mod h1:Oozbb1TVXFac9FtSIxHBMnBCq2qeH/2KkE
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/dgraph-io/badger v1.6.1 h1:w9pSFNSdq/JPM1N12Fz/F/bzo993Is1W+Q7HjPzi7yg=
github.com/dgraph-io/badger/v2 v2.0.3 h1:inzdf6VF/NZ+tJ8RwwYMjJMvsOALTHYdozn0qSl6XJI=
github.com/dgraph-io/badger/v2 v2.0.3/go.mod h1:3KY8+bsP8wI0OEnQJAKpd4wIJW/Mm32yw2j/9FUVnIM=
github.com/dgraph-io/ristretto v0.0.2-0.20200115201040-8f368f2f2ab3 h1:MQLRM35Pp0yAyBYksjbj1nZI/w6eyRY/mWoM1sFf4kU=
github.com/dgraph-io/ristretto v0.0.2-0.20200115201040-8f368f2f2ab3/go.mod h1:KPxhHT9ZxKefz+PCeOGsrHpl1qZ7i70dGTu2u+Ahh6E=
github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=
github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BMXYYRWTLOJKlh+lOBt6nUQgXAfB7oVIQt5cNreqSLI=
github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:rZfgFAXFS/z/lEd6LJmf9HVZ1LkgYiHx5pHhV5DR16M=
@ -132,8 +151,10 @@ github.com/greatroar/blobloom v0.2.1 h1:Ie7+kTQFhcvfFHhzOYSJA2XE5sp8c9iB5iapu2tI
github.com/greatroar/blobloom v0.2.1/go.mod h1:we9vO6GNYMmsNvCWINtZnQbcGEHUT6hGBAznNHd6RlE=
github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
github.com/grpc-ecosystem/grpc-gateway v1.5.0/go.mod h1:RSKVYQBd5MCa4OVpNdGskqpgL2+G+NZTnrVHpWWfpdw=
github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
github.com/jackpal/gateway v1.0.6 h1:/MJORKvJEwNVldtGVJC2p2cwCnsSoLn3hl3zxmZT7tk=
github.com/jackpal/gateway v1.0.6/go.mod h1:lTpwd4ACLXmpyiCTRtfiNyVnUmqT9RivzCDQetPfnjA=
github.com/jackpal/go-nat-pmp v1.0.2 h1:KzKSgb7qkJvOUTqYl9/Hg/me3pWgBmERKrTGD7BdWus=
@ -163,6 +184,7 @@ github.com/lucas-clemente/quic-go v0.15.6/go.mod h1:Myi1OyS0FOjL3not4BxT7KN29bRk
github.com/lucas-clemente/quic-go v0.15.7 h1:Pu7To5/G9JoP1mwlrcIvfV8ByPBlCzif3MCl8+1W83I=
github.com/lucas-clemente/quic-go v0.15.7/go.mod h1:Myi1OyS0FOjL3not4BxT7KN29bRkcMUV5JVVFLKtDp8=
github.com/lunixbochs/vtclean v1.0.0/go.mod h1:pHhQNgMf3btfWnGBVipUOjRYhoOsdGqdm/+2c2E2WMI=
github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
github.com/mailru/easyjson v0.0.0-20190312143242-1de009706dbe/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
github.com/marten-seemann/qpack v0.1.0/go.mod h1:LFt1NU/Ptjip0C2CPkhimBz5CGE3WGDAUWqna+CNTrI=
github.com/marten-seemann/qtls v0.9.1 h1:O0YKQxNVPaiFgMng0suWEOY2Sb4LT2sRn9Qimq3Z1IQ=
@ -183,6 +205,8 @@ github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b/go.mod h1:01TrycV0kFyex
github.com/microcosm-cc/bluemonday v1.0.1/go.mod h1:hsXNsILzKxV+sX77C5b8FSuKF00vh2OMYv+xgHpAMF4=
github.com/minio/sha256-simd v0.1.1 h1:5QHSlgo3nt5yKOJrC7W8w7X+NFl8cMPZm96iu8kKUJU=
github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
@ -204,6 +228,7 @@ github.com/oschwald/geoip2-golang v1.4.0 h1:5RlrjCgRyIGDz/mBmPfnAF4h8k0IAcRv9Pvr
github.com/oschwald/geoip2-golang v1.4.0/go.mod h1:8QwxJvRImBH+Zl6Aa6MaIcs5YdlZSTKtzmPGzQqi9ng=
github.com/oschwald/maxminddb-golang v1.6.0 h1:KAJSjdHQ8Kv45nFIbtoLGrGWqHFajOIm7skTyz/+Dls=
github.com/oschwald/maxminddb-golang v1.6.0/go.mod h1:DUJFucBg2cvqx42YmDa/+xHvb0elJtOm3o4aFQ/nb/w=
github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 h1:q2e307iGHPdTGp0hoxKjt1H5pDo6utceo3dQVK3I5XQ=
github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5/go.mod h1:jvVRKCrJTQWu0XVbaOlby/2lO20uSCHEMzzplHXte1o=
github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@ -276,6 +301,14 @@ github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4
github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
github.com/sourcegraph/annotate v0.0.0-20160123013949-f4cad6c6324d/go.mod h1:UdhH50NIW0fCiwBSr0co2m7BnFLdv4fQTgdqdJTHFeE=
github.com/sourcegraph/syntaxhighlight v0.0.0-20170531221838-bd320f5d308e/go.mod h1:HuIsMU8RRBOtsCgI77wP899iHVBQpCmg4ErYMZB+2IA=
github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
github.com/spf13/cobra v0.0.5/go.mod h1:3K3wKZymM7VvHMDS9+Akkh4K60UwM26emMESw8tLCHU=
github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
github.com/spf13/viper v1.3.2/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DMA2s=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
@ -293,6 +326,7 @@ github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d/go.mod h1:9OrXJ
github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
github.com/thejerf/suture v3.0.2+incompatible h1:GtMydYcnK4zBJ0KL6Lx9vLzl6Oozb65wh252FTBxrvM=
github.com/thejerf/suture v3.0.2+incompatible/go.mod h1:ibKwrVj+Uzf3XZdAiNWUouPaAbSoemxOHLmJmwheEMc=
github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
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 v1.22.2 h1:gsqYFH8bb9ekPA12kRo0hfjngWQjkJPlN9R0N78BoUo=
@ -301,11 +335,13 @@ github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49u
github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0 h1:okhMind4q9H1OxF44gNegWkiP4H/gsTFLalHFa4OOUI=
github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0/go.mod h1:TTbGUfE+cXXceWtbTHq6lqcTvYPBKLNejBEbnUsQJtU=
github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
golang.org/x/build v0.0.0-20190111050920-041ab4dc3f9d/go.mod h1:OWs+y06UdEOHN4y+MfF/py+xQ/tYqIWW03b70/CG9Rw=
golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@ -330,6 +366,7 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn
golang.org/x/net v0.0.0-20190313220215-9f648a60d977/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297 h1:k7pJ2yAPLPgbskkFdhRCsA77k2fySZ1zf2zCjvQCiIM=
golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@ -349,6 +386,7 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
golang.org/x/sys v0.0.0-20180926160741-c2ed4eda69e7/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181029174526-d69651ed3497/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
@ -356,6 +394,7 @@ golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5h
golang.org/x/sys v0.0.0-20190316082340-a2f829d7f35f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191010194322-b09406accb47 h1:/XfQ9z7ib8eEJX2hdgFTZJ/ntt0swNk5oYBziWeTCvY=
golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
@ -411,6 +450,7 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=

View File

@ -7,7 +7,12 @@
package backend
import (
"os"
"strings"
"sync"
"time"
"github.com/syncthing/syncthing/lib/locations"
)
// The Reader interface specifies the read-only operations available on the
@ -118,10 +123,24 @@ const (
)
func Open(path string, tuning Tuning) (Backend, error) {
if os.Getenv("USE_BADGER") != "" {
l.Warnln("Using experimental badger db")
if err := maybeCopyDatabase(path, strings.Replace(path, locations.BadgerDir, locations.LevelDBDir, 1), OpenBadger, OpenLevelDBRO); err != nil {
return nil, err
}
return OpenBadger(path)
}
if err := maybeCopyDatabase(path, strings.Replace(path, locations.LevelDBDir, locations.BadgerDir, 1), OpenLevelDBAuto, OpenBadger); err != nil {
return nil, err
}
return OpenLevelDB(path, tuning)
}
func OpenMemory() Backend {
if os.Getenv("USE_BADGER") != "" {
return OpenBadgerMemory()
}
return OpenLevelDBMemory()
}
@ -202,3 +221,70 @@ func (cg *closeWaitGroup) CloseWait() {
cg.closeMut.Unlock()
cg.WaitGroup.Wait()
}
type opener func(path string) (Backend, error)
// maybeCopyDatabase copies the database if the destination doesn't exist
// but the source does.
func maybeCopyDatabase(toPath, fromPath string, toOpen, fromOpen opener) error {
if _, err := os.Lstat(toPath); !os.IsNotExist(err) {
// Destination database exists (or is otherwise unavailable), do not
// attempt to overwrite it.
return nil
}
if _, err := os.Lstat(fromPath); err != nil {
// Source database is not available, so nothing to copy
return nil
}
fromDB, err := fromOpen(fromPath)
if err != nil {
return err
}
defer fromDB.Close()
toDB, err := toOpen(toPath)
if err != nil {
// That's odd, but it will be handled & reported in the usual path
// so we can ignore it here.
return err
}
defer toDB.Close()
l.Infoln("Copying database for format conversion...")
if err := copyBackend(toDB, fromDB); err != nil {
return err
}
// Move the old database out of the way to mark it as migrated.
fromDB.Close()
_ = os.Rename(fromPath, fromPath+".migrated."+time.Now().Format("20060102150405"))
return nil
}
func copyBackend(to, from Backend) error {
srcIt, err := from.NewPrefixIterator(nil)
if err != nil {
return err
}
defer srcIt.Release()
dstTx, err := to.NewWriteTransaction()
if err != nil {
return err
}
defer dstTx.Release()
for srcIt.Next() {
if err := dstTx.Put(srcIt.Key(), srcIt.Value()); err != nil {
return err
}
}
if srcIt.Error() != nil {
return err
}
srcIt.Release()
return dstTx.Commit()
}

View File

@ -0,0 +1,443 @@
// Copyright (C) 2019 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package backend
import (
"bytes"
"errors"
"time"
badger "github.com/dgraph-io/badger/v2"
)
const (
checkpointFlushMinSize = 128 << KiB
maxCacheSize = 64 << MiB
)
func OpenBadger(path string) (Backend, error) {
opts := badger.DefaultOptions(path)
opts = opts.WithMaxCacheSize(maxCacheSize).WithCompactL0OnClose(false)
opts.Logger = nil
return openBadger(opts)
}
func OpenBadgerMemory() Backend {
opts := badger.DefaultOptions("").WithInMemory(true)
opts.Logger = nil
backend, err := openBadger(opts)
if err != nil {
// Opening in-memory should never be able to fail, and is anyway
// used just by tests.
panic(err)
}
return backend
}
func openBadger(opts badger.Options) (Backend, error) {
// XXX: We should find good values for memory utilization in the "small"
// and "large" cases we support for LevelDB. Some notes here:
// https://github.com/dgraph-io/badger/tree/v2.0.3#memory-usage
bdb, err := badger.Open(opts)
if err != nil {
return nil, wrapBadgerErr(err)
}
return &badgerBackend{
bdb: bdb,
closeWG: &closeWaitGroup{},
}, nil
}
// badgerBackend implements Backend on top of a badger
type badgerBackend struct {
bdb *badger.DB
closeWG *closeWaitGroup
}
func (b *badgerBackend) NewReadTransaction() (ReadTransaction, error) {
rel, err := newReleaser(b.closeWG)
if err != nil {
return nil, err
}
return badgerSnapshot{
txn: b.bdb.NewTransaction(false),
rel: rel,
}, nil
}
func (b *badgerBackend) NewWriteTransaction() (WriteTransaction, error) {
rel1, err := newReleaser(b.closeWG)
if err != nil {
return nil, err
}
rel2, err := newReleaser(b.closeWG)
if err != nil {
rel1.Release()
return nil, err
}
// We use two transactions here to preserve the property that our
// leveldb wrapper has, that writes in a transaction are completely
// invisible until it's committed, even inside that same transaction.
rtxn := b.bdb.NewTransaction(false)
wtxn := b.bdb.NewTransaction(true)
return &badgerTransaction{
badgerSnapshot: badgerSnapshot{
txn: rtxn,
rel: rel1,
},
txn: wtxn,
bdb: b.bdb,
rel: rel2,
}, nil
}
func (b *badgerBackend) Close() error {
b.closeWG.CloseWait()
return wrapBadgerErr(b.bdb.Close())
}
func (b *badgerBackend) Get(key []byte) ([]byte, error) {
if err := b.closeWG.Add(1); err != nil {
return nil, err
}
defer b.closeWG.Done()
txn := b.bdb.NewTransaction(false)
defer txn.Discard()
item, err := txn.Get(key)
if err != nil {
return nil, wrapBadgerErr(err)
}
val, err := item.ValueCopy(nil)
if err != nil {
return nil, wrapBadgerErr(err)
}
return val, nil
}
func (b *badgerBackend) NewPrefixIterator(prefix []byte) (Iterator, error) {
if err := b.closeWG.Add(1); err != nil {
return nil, err
}
txn := b.bdb.NewTransaction(false)
it := badgerPrefixIterator(txn, prefix)
it.releaseFn = func() {
defer b.closeWG.Done()
txn.Discard()
}
return it, nil
}
func (b *badgerBackend) NewRangeIterator(first, last []byte) (Iterator, error) {
if err := b.closeWG.Add(1); err != nil {
return nil, err
}
txn := b.bdb.NewTransaction(false)
it := badgerRangeIterator(txn, first, last)
it.releaseFn = func() {
defer b.closeWG.Done()
txn.Discard()
}
return it, nil
}
func (b *badgerBackend) Put(key, val []byte) error {
if err := b.closeWG.Add(1); err != nil {
return err
}
defer b.closeWG.Done()
txn := b.bdb.NewTransaction(true)
if err := txn.Set(key, val); err != nil {
txn.Discard()
return wrapBadgerErr(err)
}
return wrapBadgerErr(txn.Commit())
}
func (b *badgerBackend) Delete(key []byte) error {
if err := b.closeWG.Add(1); err != nil {
return err
}
defer b.closeWG.Done()
txn := b.bdb.NewTransaction(true)
if err := txn.Delete(key); err != nil {
txn.Discard()
return wrapBadgerErr(err)
}
return wrapBadgerErr(txn.Commit())
}
func (b *badgerBackend) Compact() error {
if err := b.closeWG.Add(1); err != nil {
return err
}
defer b.closeWG.Done()
// This weird looking loop is as recommended in the README
// (https://github.com/dgraph-io/badger/tree/v2.0.3#garbage-collection).
// Basically, the RunValueLogGC will pick some promising thing to
// garbage collect at random and return nil if it improved the
// situation, then return ErrNoRewrite when there is nothing more to GC.
// The 0.5 is the discard ratio, for which the method docs say they
// "recommend setting discardRatio to 0.5, thus indicating that a file
// be rewritten if half the space can be discarded".
var err error
t0 := time.Now()
for err == nil {
if time.Since(t0) > time.Hour {
l.Warnln("Database compaction is taking a long time, performance may be impacted. Consider investigating and/or opening an issue if this warning repeats.")
t0 = time.Now()
}
err = b.bdb.RunValueLogGC(0.5)
}
if errors.Is(err, badger.ErrNoRewrite) {
// GC did nothing, because nothing needed to be done
return nil
}
if errors.Is(err, badger.ErrRejected) {
// GC was already running (could possibly happen), or the database
// is closed (can't happen).
return nil
}
if errors.Is(err, badger.ErrGCInMemoryMode) {
// GC in in-memory mode, which is fine.
return nil
}
return err
}
// badgerSnapshot implements backend.ReadTransaction
type badgerSnapshot struct {
txn *badger.Txn
rel *releaser
}
func (l badgerSnapshot) Get(key []byte) ([]byte, error) {
item, err := l.txn.Get(key)
if err != nil {
return nil, wrapBadgerErr(err)
}
val, err := item.ValueCopy(nil)
if err != nil {
return nil, wrapBadgerErr(err)
}
return val, nil
}
func (l badgerSnapshot) NewPrefixIterator(prefix []byte) (Iterator, error) {
return badgerPrefixIterator(l.txn, prefix), nil
}
func (l badgerSnapshot) NewRangeIterator(first, last []byte) (Iterator, error) {
return badgerRangeIterator(l.txn, first, last), nil
}
func (l badgerSnapshot) Release() {
defer l.rel.Release()
l.txn.Discard()
}
type badgerTransaction struct {
badgerSnapshot
txn *badger.Txn
bdb *badger.DB
rel *releaser
size int
}
func (t *badgerTransaction) Delete(key []byte) error {
t.size += len(key)
kc := make([]byte, len(key))
copy(kc, key)
return t.transactionRetried(func(txn *badger.Txn) error {
return txn.Delete(kc)
})
}
func (t *badgerTransaction) Put(key, val []byte) error {
t.size += len(key) + len(val)
kc := make([]byte, len(key))
copy(kc, key)
vc := make([]byte, len(val))
copy(vc, val)
return t.transactionRetried(func(txn *badger.Txn) error {
return txn.Set(kc, vc)
})
}
// transactionRetried performs the given operation in the current
// transaction, with commit and retry if Badger says the transaction has
// grown too large.
func (t *badgerTransaction) transactionRetried(fn func(*badger.Txn) error) error {
if err := fn(t.txn); err == badger.ErrTxnTooBig {
if err := t.txn.Commit(); err != nil {
return wrapBadgerErr(err)
}
t.size = 0
t.txn = t.bdb.NewTransaction(true)
return wrapBadgerErr(fn(t.txn))
} else if err != nil {
return wrapBadgerErr(err)
}
return nil
}
func (t *badgerTransaction) Commit() error {
defer t.rel.Release()
defer t.badgerSnapshot.Release()
return wrapBadgerErr(t.txn.Commit())
}
func (t *badgerTransaction) Checkpoint(preFlush ...func() error) error {
if t.size < checkpointFlushMinSize {
return nil
}
for _, hook := range preFlush {
if err := hook(); err != nil {
return err
}
}
err := t.txn.Commit()
if err == nil {
t.size = 0
t.txn = t.bdb.NewTransaction(true)
}
return wrapBadgerErr(err)
}
func (t *badgerTransaction) Release() {
defer t.rel.Release()
defer t.badgerSnapshot.Release()
t.txn.Discard()
}
type badgerIterator struct {
it *badger.Iterator
prefix []byte
first []byte
last []byte
releaseFn func()
didSeek bool
err error
}
func (i *badgerIterator) Next() bool {
if i.err != nil {
return false
}
for {
if !i.didSeek {
if i.first != nil {
// Range iterator
i.it.Seek(i.first)
} else {
// Prefix iterator
i.it.Seek(i.prefix)
}
i.didSeek = true
} else {
i.it.Next()
}
if !i.it.ValidForPrefix(i.prefix) {
// Done
return false
}
if i.first == nil && i.last == nil {
// No range checks required
return true
}
key := i.it.Item().Key()
if bytes.Compare(key, i.last) > 0 {
// Key is after range last
return false
}
return true
}
}
func (i *badgerIterator) Key() []byte {
if i.err != nil {
return nil
}
return i.it.Item().Key()
}
func (i *badgerIterator) Value() []byte {
if i.err != nil {
return nil
}
val, err := i.it.Item().ValueCopy(nil)
if err != nil {
i.err = err
}
return val
}
func (i *badgerIterator) Error() error {
return wrapBadgerErr(i.err)
}
func (i *badgerIterator) Release() {
i.it.Close()
if i.releaseFn != nil {
i.releaseFn()
}
}
// wrapBadgerErr wraps errors so that the backend package can recognize them
func wrapBadgerErr(err error) error {
if err == nil {
return nil
}
if err == badger.ErrDiscardedTxn {
return errClosed{}
}
if err == badger.ErrKeyNotFound {
return errNotFound{}
}
return err
}
func badgerPrefixIterator(txn *badger.Txn, prefix []byte) *badgerIterator {
it := iteratorForPrefix(txn, prefix)
return &badgerIterator{it: it, prefix: prefix}
}
func badgerRangeIterator(txn *badger.Txn, first, last []byte) *badgerIterator {
prefix := commonPrefix(first, last)
it := iteratorForPrefix(txn, prefix)
return &badgerIterator{it: it, prefix: prefix, first: first, last: last}
}
func iteratorForPrefix(txn *badger.Txn, prefix []byte) *badger.Iterator {
opts := badger.DefaultIteratorOptions
opts.Prefix = prefix
return txn.NewIterator(opts)
}
func commonPrefix(a, b []byte) []byte {
minLen := len(a)
if len(b) < minLen {
minLen = len(b)
}
prefix := make([]byte, 0, minLen)
for i := 0; i < minLen; i++ {
if a[i] != b[i] {
break
}
prefix = append(prefix, a[i])
}
return prefix
}

View File

@ -0,0 +1,38 @@
// Copyright (C) 2019 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package backend
import "testing"
func TestCommonPrefix(t *testing.T) {
cases := []struct {
a string
b string
common string
}{
{"", "", ""},
{"a", "b", ""},
{"aa", "ab", "a"},
{"aa", "a", "a"},
{"a", "aa", "a"},
{"aabab", "ab", "a"},
{"ab", "aabab", "a"},
{"abac", "ababab", "aba"},
{"ababab", "abac", "aba"},
}
for _, tc := range cases {
pref := string(commonPrefix([]byte(tc.a), []byte(tc.b)))
if pref != tc.common {
t.Errorf("commonPrefix(%q, %q) => %q, expected %q", tc.a, tc.b, pref, tc.common)
}
}
}
func TestBadgerBackendBehavior(t *testing.T) {
testBackendBehavior(t, OpenBadgerMemory)
}

View File

@ -33,7 +33,7 @@ const (
MiB = 20
)
// Open attempts to open the database at the given location, and runs
// OpenLevelDB attempts to open the database at the given location, and runs
// recovery on it if opening fails. Worst case, if recovery is not possible,
// the database is erased and created from scratch.
func OpenLevelDB(location string, tuning Tuning) (Backend, error) {
@ -45,7 +45,13 @@ func OpenLevelDB(location string, tuning Tuning) (Backend, error) {
return newLeveldbBackend(ldb), nil
}
// OpenRO attempts to open the database at the given location, read only.
// OpenLevelDBAuto is OpenLevelDB with TuningAuto tuning.
func OpenLevelDBAuto(location string) (Backend, error) {
return OpenLevelDB(location, TuningAuto)
}
// OpenLevelDBRO attempts to open the database at the given location, read
// only.
func OpenLevelDBRO(location string) (Backend, error) {
opts := &opt.Options{
OpenFilesCacheCapacity: dbMaxOpenFiles,

View File

@ -382,6 +382,8 @@ func (db *Lowlevel) dropDeviceFolder(device, folder []byte, meta *metadataTracke
if err != nil {
return err
}
defer dbi.Release()
var gk, keyBuf []byte
for dbi.Next() {
name := db.keyer.NameFromDeviceFileKey(dbi.Key())
@ -400,10 +402,10 @@ func (db *Lowlevel) dropDeviceFolder(device, folder []byte, meta *metadataTracke
return err
}
}
dbi.Release()
if err := dbi.Error(); err != nil {
return err
}
dbi.Release()
if bytes.Equal(device, protocol.LocalDeviceID[:]) {
key, err := db.keyer.GenerateBlockMapKey(nil, folder, nil, nil)
@ -491,6 +493,7 @@ func (db *Lowlevel) checkGlobals(folder []byte, meta *metadataTracker) error {
}
}
}
dbi.Release()
if err := dbi.Error(); err != nil {
return err
}

View File

@ -212,6 +212,10 @@ func (db *schemaUpdater) updateSchema0to1(_ int) error {
return err
}
}
dbi.Release()
if err != dbi.Error() {
return err
}
for folder := range changedFolders {
if err := db.dropFolderMeta([]byte(folder)); err != nil {

View File

@ -509,7 +509,9 @@ func (db *Lowlevel) newReadWriteTransaction() (readWriteTransaction, error) {
}
func (t readWriteTransaction) Commit() error {
t.readOnlyTransaction.close()
// The readOnlyTransaction must close after commit, because they may be
// backed by the same actual lower level transaction.
defer t.readOnlyTransaction.close()
return t.WriteTransaction.Commit()
}

View File

@ -44,12 +44,20 @@ const (
DataBaseDir BaseDirEnum = "data"
// User's home directory, *not* -home flag
UserHomeBaseDir BaseDirEnum = "userHome"
LevelDBDir = "index-v0.14.0.db"
BadgerDir = "indexdb.badger"
)
// Platform dependent directories
var baseDirs = make(map[BaseDirEnum]string, 3)
func init() {
if os.Getenv("USE_BADGER") != "" {
// XXX: Replace the leveldb name with the badger name.
locationTemplates[Database] = strings.Replace(locationTemplates[Database], LevelDBDir, BadgerDir, 1)
}
userHome := userHomeDir()
config := defaultConfigDir(userHome)
baseDirs[UserHomeBaseDir] = userHome
@ -80,8 +88,6 @@ func GetBaseDir(baseDir BaseDirEnum) string {
return baseDirs[baseDir]
}
var databaseDirname = "index-v0.14.0.db"
// Use the variables from baseDirs here
var locationTemplates = map[LocationEnum]string{
ConfigFile: "${config}/config.xml",
@ -89,7 +95,7 @@ var locationTemplates = map[LocationEnum]string{
KeyFile: "${config}/key.pem",
HTTPSCertFile: "${config}/https-cert.pem",
HTTPSKeyFile: "${config}/https-key.pem",
Database: "${data}/" + databaseDirname,
Database: "${data}/" + LevelDBDir,
LogFile: "${data}/syncthing.log", // -logfile on Windows
CsrfTokens: "${data}/csrftokens.txt",
PanicLog: "${data}/panic-${timestamp}.log",
@ -150,7 +156,14 @@ func defaultDataDir(userHome, config string) string {
default:
// If a database exists at the "normal" location, use that anyway.
if _, err := os.Lstat(filepath.Join(config, databaseDirname)); err == nil {
// We look for both LevelDB and Badger variants here regardless of
// what we're currently configured to use, because we might be
// starting up in Badger mode with only a LevelDB database present
// (will be converted), or vice versa.
if _, err := os.Lstat(filepath.Join(config, LevelDBDir)); err == nil {
return config
}
if _, err := os.Lstat(filepath.Join(config, BadgerDir)); err == nil {
return config
}
// Always use this env var, as it's explicitly set by the user