home: create 'modules/home' folder

Consolidating all modules under the same path, to clear out the
top-level directory.

modules/home/vim/plugin/settings/null-ls.lua

@@ -0,0 +1,138 @@
+local null_ls = require("null-ls")
+local lsp = require("ambroisie.lsp")
+local utils = require("ambroisie.utils")
+
+null_ls.setup({
+    on_attach = lsp.on_attach,
+})
+
+-- Bazel
+null_ls.register({
+    null_ls.builtins.diagnostics.buildifier.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("buildifier"),
+    }),
+    null_ls.builtins.formatting.buildifier.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("buildifier"),
+    }),
+})
+
+-- C, C++
+null_ls.register({
+    null_ls.builtins.formatting.clang_format.with({
+        -- Only used if available, but prefer clangd formatting if available
+        condition = function()
+            return utils.is_executable("clang-format") and not utils.is_executable("clangd")
+        end,
+    }),
+})
+
+-- Haskell
+null_ls.register({
+    null_ls.builtins.formatting.brittany.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("brittany"),
+    }),
+})
+
+-- Nix
+null_ls.register({
+    null_ls.builtins.formatting.nixpkgs_fmt.with({
+        -- Only used if available, but prefer rnix if available
+        condition = function()
+            return utils.is_executable("nixpkgs-fmt")
+                and not utils.is_executable("rnix-lsp")
+                and not utils.is_executable("nil")
+        end,
+    }),
+})
+
+-- Python
+null_ls.register({
+    null_ls.builtins.diagnostics.flake8.with({
+        -- Only used if available, but prefer pflake8 if available
+        condition = function()
+            return utils.is_executable("flake8") and not utils.is_executable("pflake8")
+        end,
+    }),
+    null_ls.builtins.diagnostics.pyproject_flake8.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("pflake8"),
+    }),
+    null_ls.builtins.diagnostics.mypy.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("mypy"),
+    }),
+    null_ls.builtins.diagnostics.pylint.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("pylint"),
+    }),
+    null_ls.builtins.formatting.black.with({
+        extra_args = { "--fast" },
+        -- Only used if available
+        condition = utils.is_executable_condition("black"),
+    }),
+    null_ls.builtins.formatting.isort.with({
+        -- Only used if available
+        condition = utils.is_executable_condition("isort"),
+    }),
+})
+
+-- Shell (non-POSIX)
+null_ls.register({
+    null_ls.builtins.code_actions.shellcheck.with({
+        -- Restrict to bash and zsh
+        filetypes = { "bash", "zsh" },
+        -- Only used if available
+        condition = utils.is_executable_condition("shellcheck"),
+    }),
+    null_ls.builtins.diagnostics.shellcheck.with({
+        -- Show error code in message
+        diagnostics_format = "[#{c}] #{m}",
+        -- Require explicit empty string test, use bash dialect
+        extra_args = { "-s", "bash", "-o", "avoid-nullary-conditions" },
+        -- Restrict to bash and zsh
+        filetypes = { "bash", "zsh" },
+        -- Only used if available
+        condition = utils.is_executable_condition("shellcheck"),
+    }),
+    null_ls.builtins.formatting.shfmt.with({
+        -- Indent with 4 spaces, simplify the code, indent switch cases,
+        -- add space after redirection, use bash dialect
+        extra_args = { "-i", "4", "-s", "-ci", "-sr", "-ln", "bash" },
+        -- Restrict to bash and zsh
+        filetypes = { "bash", "zsh" },
+        -- Only used if available
+        condition = utils.is_executable_condition("shfmt"),
+    }),
+})
+
+-- Shell (POSIX)
+null_ls.register({
+    null_ls.builtins.code_actions.shellcheck.with({
+        -- Restrict to POSIX sh
+        filetypes = { "sh" },
+        -- Only used if available
+        condition = utils.is_executable_condition("shellcheck"),
+    }),
+    null_ls.builtins.diagnostics.shellcheck.with({
+        -- Show error code in message
+        diagnostics_format = "[#{c}] #{m}",
+        -- Require explicit empty string test
+        extra_args = { "-o", "avoid-nullary-conditions" },
+        -- Restrict to POSIX sh
+        filetypes = { "sh" },
+        -- Only used if available
+        condition = utils.is_executable_condition("shellcheck"),
+    }),
+    null_ls.builtins.formatting.shfmt.with({
+        -- Indent with 4 spaces, simplify the code, indent switch cases,
+        -- add space after redirection, use POSIX
+        extra_args = { "-i", "4", "-s", "-ci", "-sr", "-ln", "posix" },
+        -- Restrict to POSIX sh
+        filetypes = { "sh" },
+        -- Only used if available
+        condition = utils.is_executable_condition("shfmt"),
+    }),
+})