markdown-preview installation error

[Itamiko]

Problems summary

Upon first run of this it will error on installing iamcco/markdown-preview.nvim

[dein] Error installing plugins:
[dein]   markdown-preview.nvim
[dein] Please read the error message log with the :message command.
[dein] Done: (2019/08/10 12:00:57)Press ENTER or type command to continue

suspect: https://github.com/hardcoreplayers/ThinkVim/blob/c8e48ba0254aae4d223537036a5eca764f726333/core/dein/plugins.yaml#L247

^ might be due to this since I do not have yarn.

Environment Information

• OS: Arch Linux x86_64

• neovim :version output:

  
  [tamiko@japan nvim]$ vim -v       
  NVIM v0.3.8
  Build type: Release
  LuaJIT 2.0.5
  Compilation: /usr/bin/cc -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -Wconversion -O2 -DNDEBUG -DMIN_LOG_LEVEL=3 -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-color=auto -Wno-array-bounds -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -I/build/neovim/src/build/config -I/build/neovim/src/neovim-0.3.8/src -I/usr/include -I/build/neovim/src/build/src/nvim/auto -I/build/neovim/src/build/include
  Compiled by builduser

Features: +acl +iconv +jemalloc +tui See ":help feature-compile"

system vimrc file: "$VIM/sysinit.vim" fall-back for $VIM: "/usr/share/nvim"

 * `:checkhealth` or `:CheckHealth` result(neovim only):

1 health#coc#check
2 ========================================================================
3   - OK: Environment check passed
4   - OK: Javascript bundle found
5   - OK: Service started
6 
7 health#nvim#check
8 ========================================================================
9 ## Configuration

10 - OK: no issues found 11 12 ## Performance 13 - OK: Build type: Release 14 15 ## Remote Plugins 16 - OK: Up to date 17 18 ## terminal 19 - INFO: key_backspace (kbs) terminfo entry: key_backspace=^H 20 - INFO: key_dc (kdch1) terminfo entry: key_dc=\E[3~ 21 - INFO: $VTE_VERSION='5603' 22 - INFO: $COLORTERM='truecolor' 23 24 health#provider#check 25 ======================================================================== 26 ## Clipboard (optional) 27 - OK: Clipboard tool found: xclip 28 29 ## Python 2 provider (optional) 30 - WARNING: No Python executable found that can import neovim. Using the first available executable for diagnostics. 31 - ERROR: Python provider error: 32 - ADVICE: 33 - provider/pythonx: Could not load Python 2: 34 python2 not found in search path or not executable. 35 python2.7 not found in search path or not executable. 36 python2.6 not found in search path or not executable. 37 /usr/bin/python is Python 3.7 and cannot provide Python 2. 38 - INFO: Executable: Not found 39 40 ## Python 3 provider (optional) 41 - INFO: g:python3_host_prog is not set. Searching for python3 in the environment. 42 - INFO: Executable: /usr/bin/python3 43 - INFO: Python version: 3.7.4 44 - INFO: pynvim version: 0.3.2 45 - OK: Latest pynvim is installed. 46 47 ## Ruby provider (optional) 48 - INFO: Ruby: ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-linux] 49 - INFO: Host: /home/tamiko/.gem/ruby/2.6.0/bin/neovim-ruby-host 50 - OK: Latest "neovim" gem is installed: 0.8.1 51 52 ## Node.js provider (optional) 53 - INFO: Node.js: v11.15.0 54 - INFO: Neovim node.js host: /home/tamiko/.node_modules/lib/node_modules/neovim/bin/cli.js 55 - OK: Latest "neovim" npm/yarn package is installed: 4.5.0 56

## How to reproduce the problem from neovim startup (Required!)

 1. check nvim env
 2. install npm only(*no yarn*)
 3. install ThinkVim `c8e48ba`
 4. open for first run install
5 wait until it's installing markdown-preview
6 error hit

[glepnir]

maybe you should install yarn . when you see --more-- in your command line you should press enter to continue

[glepnir]

i make a video about install ThinkVim https://www.youtube.com/watch?v=d8MveK-nxkg

[Itamiko]

maybe you should install yarn

Nah I won't be installing yarn, instead, I change yarn install to npm install which in turn solved my issue.

when you see --more-- in your command line you should press enter to continue

[dein] Please read the error message log with the :message command this does nothing but say

[dein] Error installing plugins:
[dein]   markdown-preview.nvim

[dein] Done: (2019/08/10 12:00:57)Press ENTER or type command to continue

but it finishes and ThinkVim is installed but just without markdown-preview

[glepnir]

you can use call dein#update() to update the plugins if it dosent installed ,it will install . you can also use the command ;+m then choose dein, and choose update

[Cyberlane]

I had this exact problem and the only solution was to install yarn unfortunately. I didn't look into why this one plugin wanted yarn when the rest worked fine with npm.

[Itamiko]

Weird for me I just changed yarn part to use npm instead.

On Sun, Aug 11, 2019 at 03:02, Justin Nel notifications@github.com wrote:

I had this exact problem and the only solution was to install yarn unfortunately. I didn't look into why this one plugin wanted yarn when the rest worked fine with npm.

[glepnir]

@iamcco maybe need the author help. can remove yarn support?

[iamcco]

yarn is not required, can use npm instead. It also have a prebuild binary bundle which can run without nodejs. Using call mkdp#util#install() function to download prebuild binary bundle, it can be use as hook by plugin manager. MarkdownPreview command only available for markdown filetype by default options.

[glepnir]

@Itamiko please git pull to update the config , Using the function to install.By the way your neovim version must be 0.4.0 above.