Some changes in env_setup.sh and Plugin configuration in .vimrc

.vimrc

@@ -143,7 +143,7 @@ endif
 call plug#begin()
 
      Plug 'dense-analysis/ale' " linting and fixing code.
-     Plug 'airblade/vim-gitgutter' " a git diff in the sign colomn.
+     "Plug 'airblade/vim-gitgutter' " a git diff in the sign colomn.
      Plug 'habamax/vim-asciidoctor' " Feature-full environment for ASCII Docs.
      Plug 'majutsushi/tagbar'       " Utility to easily browse the tag.
      Plug 'mbbill/undotree'         " Utility to view undo history
@@ -158,11 +158,98 @@ call plug#begin()
      Plug 'vim-scripts/c.vim'       " A packages of tools for C and C++.
      Plug 'vimwiki/vimwiki'         " A personal wiki plugin for Vim.
      Plug 'voldikss/vim-floaterm'   " A plugin for floating terminal inside vim.
-
+     Plug 'tpope/vim-commentary' " Commenting tool
+     Plug 'vim-airline/vim-airline-themes' " Themes for airline
+     Plug 'vim-scripts/DoxygenToolkit.vim' " Doxygen support
+     Plug 'vim-scripts/SpellCheck' " Spell checking
 call plug#end()
 
 
 " Plugin enable option
 
+
+" For dense-analysis/ale - linting
+" Ignore git commit when linting (highly annoying)
+let g:ale_pattern_options = {
+    \       'COMMIT_EDITMSG$': {'ale_linters': [], 'ale_fixers': []}
+    \   }
+let g:ale_linters = {
+    \   'yaml': ['yamllint'],
+    \   'cpp': ['clangtidy'],
+    \   'c': ['clangtidy'],
+    \   'asciidoc': ['cspell'],
+    \   'markdown': ['cspell']
+    \   }
+let g:ale_fixers = {
+    \   'cpp': ['clang-format'],
+    \   'c': ['clang-format']}
+ 
+" Automatic fixing
+autocmd FileType c nnoremap <leader>f <Plug>(ale_fix)
+ 
+" General settings
+let g:ale_linters_explicit = 1
+let g:ale_completion_enabled = 1
+let g:ale_echo_msg_format = '[%linter%] %s [%severity%]'
+let g:ale_set_balloons=1
+let g:ale_hover_to_floating_preview=1
+let g:ale_use_global_executables = 1
+let g:ale_sign_column_always = 1
+let g:ale_disable_lsp = 1
+ 
+" C++ linting
+let g:ale_cpp_clangtidy_options = '-checks=-*,cppcoreguidelines-*'
+let g:ale_cpp_clangtidy_checks = ['readability-*,performance-*,bugprone-*,misc-*']
+let g:ale_cpp_clangtidy_checks += ['clang-analyzer-cplusplus-doc-comments']
+ 
+" C linting
+let g:ale_c_clangtidy_options = '-checks=-*,cppcoreguidelines-*'
+let g:ale_c_clangtidy_checks = ['readability-*,performance-*,bugprone-*,misc-*']
+let g:ale_c_clangtidy_checks += ['-readability-function-cognitive-complexity']
+let g:ale_c_clangtidy_checks += ['-readability-identifier-length']
+let g:ale_c_clangtidy_checks += ['-misc-redundant-expression']
+let g:ale_c_build_dir_names = ['build', 'release', 'debug']
+ 
+" This function searches for the first clang-tidy config in parent directories and sets it
+function! SetClangTidyConfig()
+    let l:config_file = findfile('.clang-tidy', expand('%:p:h').';')
+    if !empty(l:config_file)
+        let g:ale_c_clangtidy_options = '--config=' . l:config_file
+        let g:ale_cpp_clangtidy_options = '--config=' . l:config_file
+    endif
+endfunction
+ 
+" Run this for c and c++ files
+autocmd BufRead,BufNewFile *.c,*.cpp,*.h,*.hpp call SetClangTidyConfig()
+
+
+
+" For tpope/vim-fugitive - git integration.
+
+nnoremap <Leader>gg :Git<CR>
+nnoremap <Leader>gs :Git status<CR>
+nnoremap <Leader>gc :Git commit<CR>
+nnoremap <Leader>gb :Git blame<CR>
+nnoremap <Leader>gd :Git difftool<CR>
+nnoremap <Leader>gm :Git mergetool<CR>
+nnoremap <Leader>gdv :Gvdiffsplit<CR>
+nnoremap <Leader>gdh :Gdiffsplit<CR>
+
+
+" For airblade/vim-gitgutter - git status reporting line by line
+
+
+" For preservim/nerdtree: the battle tested file explorer
+let g:NERDTreeWinSize = 40
+nnoremap <C-n> :NERDTreeToggle<CR>
+let NERDTreeIgnore = ['\.o$', '\.obj$', '\.a$', '\.so$', '\.out$', '\.git$']
+let NERDTreeShowHidden = 1
+
+
+" For majutsushi/tagbar: the ultimate tag bar
+nmap <F8> :TagbarToggle<CR>
+
+
+
 " For rainbow coloring of Parentheses
 let g:rainbow_active = 1 "set to 0 if you want to enable it later via :RainbowToggle