Remove dependency on canvas (#354)

canvas/README.md

@@ -0,0 +1,7 @@
+# Why?
+
+This adds a mock module for `canvas`. Nteract has a ignored require and undeclared dependency on this module. `cavnas` is a server side node module and is not used in browser side code for nteract.
+
+Installing it locally (`npm install canvas`) will resolve the problem, but it is a native module so it is flaky depending on the system, node version, processor arch, etc. This module provides a simpler, more robust solution.
+
+Remove this workaround if [this bug](https://github.com/nteract/any-vega/issues/2) ever gets resolved 

canvas/index.js

@@ -0,0 +1 @@
+module.exports = {}

canvas/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "canvas",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC"
+}

package-lock.json

@@ -5393,11 +5393,6 @@
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@@ -5641,6 +5636,7 @@
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@@ -6883,14 +6879,7 @@
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+      "version": "file:canvas"
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@@ -8435,6 +8425,7 @@
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@@ -8460,7 +8451,8 @@
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@@ -8652,7 +8644,8 @@
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@@ -8688,7 +8681,8 @@
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@@ -10674,14 +10668,6 @@
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@@ -10837,12 +10824,14 @@
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@@ -10851,6 +10840,7 @@
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@@ -20113,30 +19986,6 @@
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-    "tar": {
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-      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.13.tgz",
-      "integrity": "sha512-w2VwSrBoHa5BsSyH+KxEqeQBAllHhccyMFVHtGtdMpF4W7IRWfZjFiQceJPChOeTsSDVUpER2T8FA93pr0L+QA==",
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-        "minipass": "^2.8.6",
-        "minizlib": "^1.2.1",
-        "mkdirp": "^0.5.0",
-        "safe-buffer": "^5.1.2",
-        "yallist": "^3.0.3"
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-      "dependencies": {
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-          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
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-          "requires": {
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-          }
-        }
-      }
-    },
     "tar-fs": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.1.tgz",
@@ -22192,6 +22041,7 @@
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+      "optional": true,
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@@ -22199,12 +22049,14 @@
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           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "optional": true
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         "string-width": {
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           "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
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+          "optional": true,
           "requires": {
             "is-fullwidth-code-point": "^2.0.0",
             "strip-ansi": "^4.0.0"
@@ -22214,6 +22066,7 @@
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           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
           "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "optional": true,
           "requires": {
             "ansi-regex": "^3.0.0"
           }
@@ -22383,7 +22236,8 @@
     "yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
-      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
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+      "dev": true
     },
     "yargs": {
       "version": "13.3.2",

package.json

@@ -44,7 +44,7 @@
     "applicationinsights": "1.8.0",
     "babel-polyfill": "6.26.0",
     "bootstrap": "3.4.1",
-    "canvas": "2.6.1",
+    "canvas": "file:./canvas",
     "clean-webpack-plugin": "0.1.19",
     "copy-webpack-plugin": "6.0.2",
     "crossroads": "0.12.2",