Add hledger

README.md

@@ -136,6 +136,7 @@ Other dedicated linters that are built-in are:
 | [glslc][glslc]                         | `glslc`                |
 | [Golangci-lint][16]                    | `golangcilint`         |
 | [hadolint][28]                         | `hadolint`             |
+| [hledger][hledger]                     | `hledger`              |
 | [hlint][32]                            | `hlint`                |
 | [htmlhint][htmlhint]                   | `htmlhint`             |
 | [HTML Tidy][12]                        | `tidy`                 |
@@ -541,3 +542,4 @@ busted tests/
 [ameba]: https://github.com/crystal-ameba/ameba
 [eugene]: https://github.com/kaaveland/eugene
 [clippy]: https://github.com/rust-lang/rust-clippy
+[hledger]: https://hledger.org/

lua/lint/linters/hledger.lua

@@ -0,0 +1,24 @@
+return {
+  cmd = "hledger",
+  stdin = true,
+  args = {"check", "-s", "-f", "-"},
+  stream = "stderr",
+  ignore_exitcode = true,
+  parser = function(output)
+    --- hledger currently outputs at most one error.
+    ---@type vim.Diagnostic[]
+    local result = {}
+    local pattern = "hledger: Error: %-:(%d+):(.*)"
+    local lnum, msg = output:match(pattern)
+    if lnum and (tonumber(lnum) or 0) > 0 then
+      table.insert(result, {
+        message = msg,
+        col = 0,
+        lnum = tonumber(lnum) - 1,
+        severity = vim.diagnostic.severity.ERROR,
+        source = "hledger"
+      })
+    end
+    return result
+  end
+}

tests/hledger_spec.lua

@@ -0,0 +1,35 @@
+describe("hledger", function()
+  local parser = require("lint.linters.hledger").parser
+  it("no diagnostics on empty output", function()
+    assert.are.same({}, parser(""))
+  end)
+
+  it("returns error diagnostic on error output", function()
+    -- editorconfig-checker-disable
+    local msg = [[
+   | 2024-08-10 * payment
+   |     revenue:dev:customer          -1.234,00 EUR
+14 |     assets:receivable:customer     1.234,00 EUR
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Strict account checking is enabled, and
+account "assets:receivable:customer" has not been declared.
+Consider adding an account directive. Examples:
+
+account assets:receivable:customer
+account assets:receivable:customer    ; type:A  ; (L,E,R,X,C,V)
+]]
+    -- editorconfig-checker-enable
+    local output = "hledger: Error: -:14:" .. msg
+    local expected = {
+      {
+        message = msg,
+        col = 0,
+        lnum = 13,
+        severity = vim.diagnostic.severity.ERROR,
+        source = "hledger"
+      },
+    }
+    assert.are.same(expected, parser(output))
+  end)
+end)