add install script from coc.nvim

app/install.cmd

@@ -0,0 +1,29 @@
+@PowerShell -ExecutionPolicy Bypass -Command Invoke-Expression $('$args=@(^&{$args} %*);'+[String]::Join(';',(Get-Content '%~f0') -notmatch '^^@PowerShell.*EOF$')) & goto :EOF
+
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+
+$repo = "iamcco/markdown-preview.nvim"
+$file = "markdown-preview-win.zip"
+
+$releases = "https://api.github.com/repos/$repo/releases"
+
+Write-Host Determining latest release
+if ($args[0]) { $tag = $args[0] } else { $tag = (Invoke-WebRequest $releases | ConvertFrom-Json)[0].tag_name }
+
+$download = "https://github.com/$repo/releases/download/$tag/$file"
+$name = $file.Split(".")[0]
+$zip = "$name-$tag.zip"
+$dir = "bin"
+
+new-item -Name $dir -ItemType directory -Force
+
+Write-Host Dowloading latest release
+Invoke-WebRequest $download -Out $zip
+
+Remove-Item $dir\* -Recurse -Force -ErrorAction SilentlyContinue
+
+Write-Host Extracting release files
+Expand-Archive $zip -DestinationPath $dir -Force
+
+Remove-Item $zip -Force
+Write-Host markdown-preview install completed.

app/install.sh

@@ -0,0 +1,84 @@
+#!/bin/sh
+
+set -o nounset    # error when referencing undefined variable
+set -o errexit    # exit when command fails
+
+BOLD="$(tput bold 2>/dev/null || echo '')"
+GREY="$(tput setaf 0 2>/dev/null || echo '')"
+BLUE="$(tput setaf 4 2>/dev/null || echo '')"
+RED="$(tput setaf 1 2>/dev/null || echo '')"
+NO_COLOR="$(tput sgr0 2>/dev/null || echo '')"
+YELLOW="$(tput setaf 3 2>/dev/null || echo '')"
+
+error() {
+  printf "${RED} $@${NO_COLOR}\n" >&2
+}
+
+warn() {
+  printf "${YELLOW}! $@${NO_COLOR}\n"
+}
+
+info() {
+  printf "${BLUE} $@${NO_COLOR}\n"
+}
+
+fetch() {
+  local command
+  if hash curl 2>/dev/null; then
+    set +e
+    command="curl --fail -L $1"
+    curl --compressed --fail -L "$1"
+    rc=$?
+    set -e
+  else
+    if hash wget 2>/dev/null; then
+      set +e
+      command="wget -O- -q $1"
+      wget -O- -q "$1"
+      rc=$?
+      set -e
+    else
+      error "No HTTP download program (curl, wget) found…"
+      exit 1
+    fi
+  fi
+
+  if [ $rc -ne 0 ]; then
+    error "Command failed (exit code $rc): ${BLUE}${command}${NO_COLOR}"
+    exit $rc
+  fi
+}
+
+get_latest_release() {
+  fetch "https://api.github.com/repos/iamcco/markdown-preview.nvim/releases/latest" |
+    grep '"tag_name":' |
+    sed -E 's/.*"([^"]+)".*/\1/'
+}
+
+if [ $# -eq 0 ]; then
+  info "Fetching latest release."
+  tag=$(get_latest_release)
+else
+  tag=$1
+fi
+
+download() {
+  mkdir -p bin
+  cd bin
+  url="https://github.com/iamcco/markdown-preview.nvim/releases/download/$tag/${1}"
+  info "Downloading binary from ${url}"
+  if fetch "${url}" | tar xzfv -; then
+    chmod a+x ${1%.tar.gz}
+    return
+  else
+    warn "Binary not available for now, please wait for a few minutes."
+  fi
+}
+
+arch=$(uname -sm)
+case "${arch}" in
+  "Linux x86_64") download markdown-preview-linux.tar.gz ;;
+  "Linux i686") download markdown-preview-linux.tar.gz ;;
+  "Darwin x86_64") download markdown-preview-macos.tar.gz ;;
+  *) info "No pre-built binary available for ${arch}.";;
+esac

autoload/mkdp/util.vim

@@ -1,3 +1,4 @@
+let s:mkdp_root_dir = expand('<sfile>:h:h:h')
 
 " echo message
 function! mkdp#util#echo_messages(hl, msgs)
@@ -60,3 +61,55 @@ function! mkdp#util#get_platform() abort
   return 'linux'
 endfunction
 
+function! mkdp#util#open_terminal(opts) abort
+  if get(a:opts, 'position', 'bottom') ==# 'bottom'
+    let p = '5new'
+  else
+    let p = 'vnew'
+  endif
+  execute 'belowright '.p.' +setl\ buftype=nofile '
+  setl buftype=nofile
+  setl winfixheight
+  setl norelativenumber
+  setl nonumber
+  setl bufhidden=wipe
+  let cmd = get(a:opts, 'cmd', '')
+  let autoclose = get(a:opts, 'autoclose', 1)
+  if empty(cmd)
+    throw 'command required!'
+  endif
+  let cwd = get(a:opts, 'cwd', '')
+  if !empty(cwd) | execute 'lcd '.cwd | endif
+  let keepfocus = get(a:opts, 'keepfocus', 0)
+  let bufnr = bufnr('%')
+  let Callback = get(a:opts, 'Callback', v:null)
+  if has('nvim')
+    call termopen(cmd, {
+          \ 'on_exit': function('s:OnExit', [autoclose, bufnr, Callback]),
+          \})
+  else
+    call term_start(cmd, {
+          \ 'exit_cb': function('s:OnExit', [autoclose, bufnr, Callback]),
+          \ 'curwin': 1,
+          \})
+  endif
+  if keepfocus
+    wincmd p
+  endif
+  return bufnr
+endfunction
+
+function! s:markdown_preview_installed() abort
+  echo '[markdown-preview.nvim]: install cpmpleted'
+endfunction
+
+function! mkdp#util#install()
+  let cmd = (mkdp#util#get_platform() ==# 'win' ? 'install.cmd' : './install.sh')
+  call mkdp#util#open_terminal({
+        \ 'cmd': cmd,
+        \ 'cwd': s:mkdp_root_dir . '/app',
+        \ 'Callback': function('s:markdown_preview_installed')
+        \})
+  wincmd p
+endfunction
+