enh(shell) Support multiline commands (#2861)

Author: ggrossetie

AUTHORS.txt

@@ -309,3 +309,4 @@ Contributors:
 - Patrick Scheibe <patrick@halirutan.de>
 - Kyle Brown <kylebrown9@github>
 - Marcus Ortiz <mportiz08@gmail.com>
+- Guillaume Grossetie <ggrossetie@yuzutech.fr>

CHANGES.md

@@ -23,6 +23,7 @@ New Languages:
 
 Language Improvements:
 
+- enh(shell) Add support for multiline commands with line continuation `\` (#2861) [Guillaume Grossetie][]
 - enh(autodetect) Over 30+ improvements to auto-detect (#2745) [Josh Goebel][]
     - 4-5% improvement in auto-detect against large sample set
     - properties, angelscript, lsl, javascript, n1ql, ocaml, ruby
@@ -67,6 +68,7 @@ New themes:
 - *StackOverflow Dark* by [Jan Pilzer][]
 - *StackOverflow Light* by [Jan Pilzer][]
 
+[Guillaume Grossetie]: https://github.com/mogztter
 [Brad Chamberlain]: https://github.com/bradcray
 [Marat Nagayev]: https://github.com/nagayev
 [Fredrik Ekre]: https://github.com/fredrikekre

src/languages/shell.js

@@ -3,18 +3,21 @@ Language: Shell Session
 Requires: bash.js
 Author: TSUYUSATO Kitsune <make.just.on@gmail.com>
 Category: common
+Audit: 2020
 */
 
+/** @type LanguageFn */
 export default function(hljs) {
   return {
     name: 'Shell Session',
     aliases: ['console'],
     contains: [
       {
         className: 'meta',
-        begin: '^\\s{0,3}[/\\w\\d\\[\\]()@-]*[>%$#]',
+        begin: /^\s{0,3}[/\w\d[\]()@-]*[>%$#]/,
         starts: {
-          end: '$', subLanguage: 'bash'
+          end: /[^\\](?=\s*$)/,
+          subLanguage: 'bash'
         }
       }
     ]

test/markup/shell/command-continuation.expect.txt

@@ -0,0 +1,14 @@
+<span class="hljs-meta">$</span><span class="bash"> docker run \
+      --publish=7474:7474 --publish=7687:7687 \
+      --volume=/neo4j/data:/data \
+      --volume=/neo4j/plugins:/plugins \
+      --volume=/neo4j/conf:/conf \
+      --volume=/logs/neo4j:/logs \
+      --user=<span class="hljs-string">&quot;<span class="hljs-subst">$(id -u neo4j)</span>:<span class="hljs-subst">$(id -g neo4j)</span>&quot;</span> \
+      --group-add=<span class="hljs-variable">$groups</span> \
+      neo4j:3.4</span>
+<span class="hljs-meta">&gt;</span><span class="bash"> /bin/cat \.travis.yml\
+ -b | head -n1</span>
+     1	language: node_js
+<span class="hljs-meta">&gt;</span><span class="bash"> <span class="hljs-built_in">echo</span> <span class="hljs-string">&#x27;hello&#x27;</span></span>
+hello

test/markup/shell/command-continuation.txt

@@ -0,0 +1,14 @@
+$ docker run \
+      --publish=7474:7474 --publish=7687:7687 \
+      --volume=/neo4j/data:/data \
+      --volume=/neo4j/plugins:/plugins \
+      --volume=/neo4j/conf:/conf \
+      --volume=/logs/neo4j:/logs \
+      --user="$(id -u neo4j):$(id -g neo4j)" \
+      --group-add=$groups \
+      neo4j:3.4
+> /bin/cat \.travis.yml\
+ -b | head -n1
+     1	language: node_js
+> echo 'hello'
+hello

test/markup/shell/simple.expect.txt

@@ -0,0 +1 @@
+<span class="hljs-meta">&gt;</span><span class="bash"> /bin/sh</span>

test/markup/shell/simple.txt

@@ -0,0 +1 @@
+> /bin/sh

test/markup/shell/single.expect.txt

@@ -0,0 +1 @@
+<span class="hljs-meta">$</span><span class="bash"> <span class="hljs-built_in">echo</span> <span class="hljs-string">&quot;<span class="hljs-variable">$HOME</span>&quot;</span> -n</span>

test/markup/shell/single.txt

@@ -0,0 +1 @@
+$ echo "$HOME" -n