Improve shell syntax highlighting

[aeschli]

From @bfred-it on October 6, 2017 11:24

This is the current highlighting for a .sh file, which is essentially zero. Can this be extended to at the very least highlight the command name and --flags? That'd go a long way

Example from fishell (no flag highlight but it underlines existing file paths):

---

• VSCode Version: Code 1.16.1 (27492b6bf3acb0775d82d2f87b25a93490673c6d, 2017-09-14T16:24:39.530Z)
• OS Version: Darwin x64 15.6.0
• Extensions:

Extension	Author (truncated)	Version
EditorConfig	Edi	0.10.1
beautify	Hoo	1.1.1
fish	Ted	0.0.4
vs-code-bitkompagniet-require	bit	0.7.0
vscode-svgviewer	css	1.4.3
vscode-eslint	dba	1.3.2
gitlens	eam	5.4.1
vscode-npm-script	eg2	0.2.1
code-runner	for	0.7.2
Untabify	ili	0.0.2
search-node-modules	jas	1.2.0
vscode-gutter-preview	kis	0.11.1
vscode-lebab	mrm	2.5.0
sublime-keybindings	ms-	2.9.1
typescript-javascript-grammar	ms-	0.0.24
debugger-for-ios-web	msj	0.1.2
node-modules-resolve	nau	1.0.2
peep	nwa	0.0.5
vscode-icons	rob	7.14.0
linter-xo	sam	2.1.3
trailing-spaces	sha	0.2.11
stylelint	shi	0.29.1
vscode-fileutils	sle	2.7.0
ayu	tea	0.8.0
shellcheck	tim	0.1.0
ghosttext	tok	1.0.2

Copied from original issue: microsoft/vscode#35707

[fregante]

Actually a duplicate of #7, which is unfortunately open since 2011 :(

[tbates]

shall we merge these two issues? (#7 and #45?)

My bundle fork is here
It has some added commands. It would be great to import an open source python or other library which does this. Would need support from @infininight and @sorbits, as well as the current (is there one? it's been so long...) bundle maintainer. I gave up last time. Very happy to work on this again though!

Currently getting an error trying to pull the most recent updates from the textmate managed bundle to merge with mine. Will explore

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree fetch upstream 
error: cannot open .git/FETCH_HEAD: Permission denied

[icetbr]

This should help a bit better-shellscript-syntax