Please provide a snap package

[0xBADEAFFE]

It would be great if you could provide a snap package for keeweb. Instructions are here: http://snapcraft.io/.

[owais]

This would be really great. A deb or ppa package would be nice as well but creating a snap is much simpler and it can work on all distros.

[piclemx]

It's will give you more visibility with this feature.

[pedzed]

Any update on this?

[jasperweiss]

This would be great since snaps also sandbox the application. Snaps finally allow for a somewhat trusted Linux desktop system. (assuming Wayland is used as the display server, rather than X11)

[gustawdaniel]

I found tutorial how tho add snap

https://docs.snapcraft.io/electron-apps/6748

I go through process of running this project on my local machine #1035 and #1038

Then after command npm run dist had error

  ⨯ snapcraft is not installed, please: sudo snap install snapcraft --classic

Fexed by

sudo snap install snapcraft --classic

that installed version

snapcraft 2.43.1 from Canonical✓ installed

And again had error

> keeweb@1.6.3 dist /home/daniel/exp/keeweb
> build --linux snap

  • electron-builder version=20.36.2
  • writing effective config file=dist/builder-effective-config.yaml
  • rebuilding native production dependencies platform=linux arch=x64
  • packaging       platform=linux arch=x64 electron=1.8.8 appOutDir=dist/linux-unpacked
  • building        target=snap arch=x64 file=dist/keeweb_1.6.3_amd64.snap
  • default Electron icon is used reason=application icon is not set
  • application Linux category is set to default "Utility" reason=linux.category is not set and cannot map from macOS docs=https://electron.build/configuration/configuration#LinuxBuildOptions-category
  ⨯ at least snapcraft 2.40.0 is required, please: sudo snap install snapcraft --classic
Error: /home/daniel/exp/keeweb/node_modules/app-builder-bin/linux/x64/app-builder exited with code 1
    at ChildProcess.childProcess.once.code (/home/daniel/exp/keeweb/node_modules/builder-util/src/util.ts:244:14)
    at Object.onceWrapper (events.js:317:30)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:925:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
From previous event:
    at SnapTarget.build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/targets/snap.ts:146:44)
    at Function.buildAsyncTargets (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:140:36)
    at LinuxPackager.packageInDistributableFormat (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:119:24)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:114:10
    at Generator.next (<anonymous>)
    at runCallback (timers.js:794:20)
    at tryOnImmediate (timers.js:752:5)
    at processImmediate [as _immediateCallback] (timers.js:729:5)
From previous event:
    at LinuxPackager.pack (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:111:95)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:406:24
    at Generator.next (<anonymous>)
    at xfs.stat (/home/daniel/exp/keeweb/node_modules/fs-extra-p/node_modules/fs-extra/lib/mkdirs/mkdirs.js:56:16)
    at /home/daniel/exp/keeweb/node_modules/graceful-fs/polyfills.js:287:18
    at FSReqWrap.oncomplete (fs.js:153:5)
From previous event:
    at Packager.doBuild (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:372:24)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:342:57
    at Generator.next (<anonymous>)
    at /home/daniel/exp/keeweb/node_modules/graceful-fs/graceful-fs.js:99:16
    at /home/daniel/exp/keeweb/node_modules/graceful-fs/graceful-fs.js:43:10
    at FSReqWrap.oncomplete (fs.js:135:15)
From previous event:
    at Packager._build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:311:133)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:307:23
    at Generator.next (<anonymous>)
    at runCallback (timers.js:794:20)
    at tryOnImmediate (timers.js:752:5)
    at processImmediate [as _immediateCallback] (timers.js:729:5)
From previous event:
    at Packager.build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:264:14)
    at build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/index.ts:59:28)
    at build (/home/daniel/exp/keeweb/node_modules/electron-builder/src/builder.ts:227:10)
    at then (/home/daniel/exp/keeweb/node_modules/electron-builder/src/cli/cli.ts:46:19)
    at <anonymous>
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! keeweb@1.6.3 dist: `build --linux snap`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the keeweb@1.6.3 dist script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/daniel/.npm/_logs/2018-11-18T02_28_01_444Z-debug.log

For example from page

https://docs.snapcraft.io/electron-apps/6748

everything works great. So where is the difference?

On website electron in in version 2.0.0, but in repository

https://github.com/electron/electron-quick-start

electron have version 3.0.4

I will try update it and give feedback. If anyone know how consequences can have updating electron please share your knowledge there.

[gustawdaniel]

In this project there is used electron 1.8.8 in develop branch.

update in branch develop is 1.7.9, I updated to 1.8.8 in my other branch

This is website about migration

https://electronjs.org/blog/electron-2-0

After update to v2 I got error

Local Npm module "grunt-appdmg" not found. Is it installed?

and

ls node_modules/grunt-appdmg
ls: cannot access 'node_modules/grunt-appdmg': No such file or directory

So after website

https://www.npmjs.com/package/grunt-appdmg

I installed by

npm install grunt-appdmg --save-dev

In this project it was in optional dependencies.

and had error

 Unsupported platform for grunt-appdmg@0.4.0: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

I can find similar error in logs from #935

this error was mentioned also there npm/npm#11973 so I tried recommended

npm update --depth 999

without effect. If I want install grunt-appdmg I still have

npm WARN deprecated cross-spawn-async@2.2.5: cross-spawn no longer requires a build toolchain, use it instead
npm ERR! code EBADPLATFORM
npm ERR! notsup Unsupported platform for grunt-appdmg@0.4.0: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm ERR! notsup Valid OS:    darwin
npm ERR! notsup Valid Arch:  any
npm ERR! notsup Actual OS:   linux
npm ERR! notsup Actual Arch: x64

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/daniel/.npm/_logs/2018-11-18T03_00_24_691Z-debug.log

Anyway npm run dev works and displays finally

    webpack: Compiled successfully.

and

npm run electron

works too. I think we can update README again and put them run instead of run-script and npm run dev insead grunt dev because of anyone can have different version of grunt, and for example I do not have it installed globally.

Unfortunatelly I afraid to develop it without tests. Now testa are broken.

npm test

> keeweb@1.6.3 test /home/daniel/exp/keeweb
> grunt test

>> Local Npm module "grunt-appdmg" not found. Is it installed?
Warning: Task "test" not found. Use --force to continue.

Aborted due to warnings.


Execution Time (2018-11-18 04:13:13 UTC+1)
loading tasks  2.8s  ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 100%
Total 2.8s

npm ERR! Test failed.  See above for more details.

I commit my changes and come back to master and check there. In master npm i does not works.

binding.target.mk:115: recipe for target 'Release/obj.target/binding/src/binding.o' failed
make: *** [Release/obj.target/binding/src/binding.o] Error 1
make: Leaving directory '/home/daniel/exp/keeweb/node_modules/node-sass/build'
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/home/daniel/exp/keeweb/node_modules/node-gyp/lib/build.js:258:23)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:237:12)
gyp ERR! System Linux 4.15.0-39-generic
gyp ERR! command "/home/daniel/.nvm/versions/node/v10.7.0/bin/node" "/home/daniel/exp/keeweb/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /home/daniel/exp/keeweb/node_modules/node-sass
gyp ERR! node -v v10.7.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 
Build failed with error code: 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: grunt-appdmg@0.4.0 (node_modules/grunt-appdmg):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for grunt-appdmg@0.4.0: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: appdmg@0.4.5 (node_modules/appdmg):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for appdmg@0.4.5: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: iltorb@1.0.13 (node_modules/iltorb):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: iltorb@1.0.13 install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: keytar@4.0.3 (node_modules/keytar):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: keytar@4.0.3 install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.5.3 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the node-sass@4.5.3 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/daniel/.npm/_logs/2018-11-18T03_18_27_601Z-debug.log

rm -rf node_modules

fixed problem.

There was errors

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.5.3/linux-x64-64_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.5.3/linux-x64-64_binding.node": 

HTTP error 404 Not Found

Hint: If github.com is not accessible in your location
      try setting a proxy via HTTP_PROXY, e.g. 

      export HTTP_PROXY=http://example.com:1234

or configure npm proxy via

      npm config set proxy http://example.com:8080

> keytar@4.0.3 install /home/daniel/exp/keeweb/node_modules/keytar
> node-gyp rebuild

make: Entering directory '/home/daniel/exp/keeweb/node_modules/keytar/build'
  CXX(target) Release/obj.target/keytar/src/async.o
In file included from ../../nan/nan.h:190:0,
                 from ../src/async.cc:3:
../../nan/nan_maybe_43_inl.h: In function ‘Nan::Maybe<bool> Nan::ForceSet(v8::Local<v8::Object>, v8::Local<v8::Value>, v8::Local<v8::Value>, v8::PropertyAttribute)’:
../../nan/nan_maybe_43_inl.h:112:15: error: ‘class v8::Object’ has no member named ‘ForceSet’
   return obj->ForceSet(isolate->GetCurrentContext(), key, value, attribs);
               ^~~~~~~~
keytar.target.mk:103: recipe for target 'Release/obj.target/keytar/src/async.o' failed
make: *** [Release/obj.target/keytar/src/async.o] Error 1
make: Leaving directory '/home/daniel/exp/keeweb/node_modules/keytar/build'
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/home/daniel/.nvm/versions/node/v10.7.0/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:258:23)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:237:12)
gyp ERR! System Linux 4.15.0-39-generic
gyp ERR! command "/home/daniel/.nvm/versions/node/v10.7.0/bin/node" "/home/daniel/.nvm/versions/node/v10.7.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /home/daniel/exp/keeweb/node_modules/keytar
gyp ERR! node -v v10.7.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 

I cant understood why on master npm i does not work bug give errors

gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/home/daniel/exp/keeweb/node_modules/node-gyp/lib/build.js:258:23)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:237:12)
gyp ERR! System Linux 4.15.0-39-generic
gyp ERR! command "/home/daniel/.nvm/versions/node/v10.7.0/bin/node" "/home/daniel/exp/keeweb/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /home/daniel/exp/keeweb/node_modules/node-sass
gyp ERR! node -v v10.7.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 
Build failed with error code: 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: grunt-appdmg@0.4.0 (node_modules/grunt-appdmg):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for grunt-appdmg@0.4.0: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: iltorb@1.0.13 (node_modules/iltorb):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: iltorb@1.0.13 install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: keytar@4.0.3 (node_modules/keytar):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: keytar@4.0.3 install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.5.3 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the node-sass@4.5.3 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/daniel/.npm/_logs/2018-11-18T03_23_19_537Z-debug.log

Can it be connected with migration to node 10 from 8 when I first time run master? I do not know.

On develop npm i works... npm run dev too, and npm run electron not...

> keeweb@1.6.3 electron /home/daniel/exp/keeweb
> electron desktop --htmlpath=http://localhost:8085/tmp/

/home/daniel/exp/keeweb/node_modules/electron/index.js:9
  throw new Error('Electron failed to install correctly, please delete node_modules/electron and try installing again')
  ^

Error: Electron failed to install correctly, please delete node_modules/electron and try installing again
    at Object.<anonymous> (/home/daniel/exp/keeweb/node_modules/electron/index.js:9:9)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/home/daniel/exp/keeweb/node_modules/electron/cli.js:3:16)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! keeweb@1.6.3 electron: `electron desktop --htmlpath=http://localhost:8085/tmp/`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the keeweb@1.6.3 electron script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/daniel/.npm/_logs/2018-11-18T03_31_06_587Z-debug.log

I see. I updated electron before by simple npm update

git diff 685d74855df4323d539343f3b1480fca0cedc4cc..747b0e46d9a1f96e78ae5c532f75a6b1650b7e9d package.json
diff --git a/package.json b/package.json
index 805bfbf..a395ae8 100644
--- a/package.json
+++ b/package.json
@@ -20,11 +20,11 @@
     "base64-loader": "1.0.0",
     "bourbon": "4.2.7",
     "cssnano": "3.10.0",
-    "electron": "^1.7.9",
+    "electron": "^1.8.8",
     "eslint": "^3.19.0",
     "eslint-config-standard": "10.2.1",
-    "eslint-plugin-import": "^2.3.0",
-    "eslint-plugin-node": "^5.0.0",
+    "eslint-plugin-import": "^2.14.0",
+    "eslint-plugin-node": "^5.2.1",
     "eslint-plugin-promise": "3.5.0",
     "eslint-plugin-standard": "3.0.1",
     "exports-loader": "0.6.4",
@@ -56,7 +56,7 @@
     "jsqrcode": "github:antelle/jsqrcode#0.1.3",
     "kdbxweb": "1.2.2",
     "load-grunt-tasks": "3.5.2",
-    "node-sass": "^4.5.3",
+    "node-sass": "^4.10.0",
     "node-stream-zip": "1.3.7",
     "normalize.css": "5.0.0",
     "pikaday": "1.5.1",
@@ -68,8 +68,8 @@
     "sumchecker": "^2.0.2",
     "time-grunt": "1.4.0",
     "uglify-loader": "2.0.0",
-    "webpack": "^2.6.1",
-    "webpack-dev-server": "^2.4.5"
+    "webpack": "^2.7.0",
+    "webpack-dev-server": "^2.11.3"
   },
   "optionalDependencies": {
     "grunt-appdmg": "0.4.0",

because of downgrades in package-lock.json...

rm -rf node_modules && npm install

Anyway I come back to develop branch and npm run test still not works. In package.json there is

  "scripts": {
    "start": "grunt",
    "test": "grunt test",

but in Gruntfile.js

only test words are in webpack config. No taks test is registered.

So i propose
a) add tests
b) remove line "test": "grunt test", from package.json
c) write docs about using tests if there are tests added in other way

I checked and even without updates snap throw the same error

npm run dist

> keeweb@1.6.3 dist /home/daniel/exp/keeweb
> build --linux snap

  • electron-builder version=20.36.2
  • writing effective config file=dist/builder-effective-config.yaml
  • rebuilding native production dependencies platform=linux arch=x64
  • packaging       platform=linux arch=x64 electron=1.7.9 appOutDir=dist/linux-unpacked
  • downloading               parts=8 size=51 MB url=https://github.com/electron/electron/releases/download/v1.7.9/electron-v1.7.9-linux-x64.zip
  • downloaded                duration=14.168s url=https://github.com/electron/electron/releases/download/v1.7.9/electron-v1.7.9-linux-x64.zip
  • building        target=snap arch=x64 file=dist/keeweb_1.6.3_amd64.snap
  • default Electron icon is used reason=application icon is not set
  • application Linux category is set to default "Utility" reason=linux.category is not set and cannot map from macOS docs=https://electron.build/configuration/configuration#LinuxBuildOptions-category
  ⨯ at least snapcraft 2.40.0 is required, please: sudo snap install snapcraft --classic
Error: /home/daniel/exp/keeweb/node_modules/app-builder-bin/linux/x64/app-builder exited with code 1
    at ChildProcess.childProcess.once.code (/home/daniel/exp/keeweb/node_modules/builder-util/src/util.ts:244:14)
    at Object.onceWrapper (events.js:273:13)
    at ChildProcess.emit (events.js:182:13)
    at maybeClose (internal/child_process.js:961:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:248:5)
From previous event:
    at SnapTarget.build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/targets/snap.ts:146:44)
    at Function.buildAsyncTargets (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:140:36)
    at LinuxPackager.packageInDistributableFormat (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:119:24)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:114:10
    at Generator.next (<anonymous>)
    at runCallback (timers.js:696:18)
    at tryOnImmediate (timers.js:667:5)
    at processImmediate (timers.js:649:5)
From previous event:
    at LinuxPackager.pack (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/platformPackager.ts:111:95)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:406:24
    at Generator.next (<anonymous>)
    at xfs.stat (/home/daniel/exp/keeweb/node_modules/fs-extra-p/node_modules/fs-extra/lib/mkdirs/mkdirs.js:56:16)
    at /home/daniel/exp/keeweb/node_modules/graceful-fs/polyfills.js:287:18
    at FSReqWrap.oncomplete (fs.js:159:5)
From previous event:
    at Packager.doBuild (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:372:24)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:342:57
    at Generator.next (<anonymous>)
    at /home/daniel/exp/keeweb/node_modules/graceful-fs/graceful-fs.js:99:16
    at /home/daniel/exp/keeweb/node_modules/graceful-fs/graceful-fs.js:43:10
    at FSReqWrap.oncomplete (fs.js:145:20)
From previous event:
    at Packager._build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:311:133)
    at /home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:307:23
    at Generator.next (<anonymous>)
    at runCallback (timers.js:696:18)
    at tryOnImmediate (timers.js:667:5)
    at processImmediate (timers.js:649:5)
From previous event:
    at Packager.build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/packager.ts:264:14)
    at build (/home/daniel/exp/keeweb/node_modules/app-builder-lib/src/index.ts:59:28)
    at build (/home/daniel/exp/keeweb/node_modules/electron-builder/src/builder.ts:227:10)
    at then (/home/daniel/exp/keeweb/node_modules/electron-builder/src/cli/cli.ts:46:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! keeweb@1.6.3 dist: `build --linux snap`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the keeweb@1.6.3 dist script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/daniel/.npm/_logs/2018-11-18T04_04_18_696Z-debug.log

So I will find problem in other place. In repository https://github.com/electron-userland/electron-builder
there are not reported problems with backward compatibility.

But in docs of electron

./node_modules/.bin/electron --help
Electron 1.7.9 - Build cross platform desktop apps with JavaScript, HTML, and CSS

  Usage: electron [options] [path]

  A path to an Electron app may be specified. The path must be one of the following:

    - index.js file.
    - Folder containing a package.json file.
    - Folder containing an index.js file.
    - .html/.htm file.
    - http://, https://, or file:// URL.

  Options:
    -h, --help            Print this usage message.
    -i, --interactive     Open a REPL to the main process.
    -r, --require         Module to preload (option can be repeated)
    -v, --version         Print the version.
    --abi                 Print the application binary interface.

there is explained that command electron desktop --htmlpath=http://localhost:8085/tmp/ run by npm run electron means that project is in directory desktop. Ok so in docs of snap I can find proper flag

When I run

./node_modules/.bin/build --linux snap --project desktop

I get error

  • electron-builder version=20.36.2
  • writing effective config file=desktop/dist/builder-effective-config.yaml
  • no native production dependencies
  • packaging       platform=linux arch=x64 electron=3.0.9 appOutDir=desktop/dist/linux-unpacked
  • downloading               parts=8 size=52 MB url=https://github.com/electron/electron/releases/download/v3.0.9/electron-v3.0.9-linux-x64.zip
  • downloaded                duration=33.686s url=https://github.com/electron/electron/releases/download/v3.0.9/electron-v3.0.9-linux-x64.zip
  • building        target=snap arch=x64 file=desktop/dist/KeeWeb_1.6.3_amd64.snap
  • default Electron icon is used reason=application icon is not set
image /home/daniel/exp/keeweb/desktop/icon.png must be at least 256x256

And size of image is too small

 file  /home/daniel/exp/keeweb/desktop/icon.png
/home/daniel/exp/keeweb/desktop/icon.png: PNG image data, 128 x 128, 8-bit/color RGBA, non-interlaced

So temporary I resize

 convert desktop/icon.png -resize 256x256 desktop/icon.png

But bettet to find svg and create icon correctly and... Wow! It works. I created my first snap.

./node_modules/.bin/build --linux snap --project desktop.

Summary

To build snap you should run command

npm run dist

And you should see file

ls desktop/dist/KeeWeb_*_amd64.snap