builtins/formatting: add atlas_fmt (#232)

Author: EkeMinusYou

doc/BUILTINS.md

@@ -1940,6 +1940,23 @@ local sources = { null_ls.builtins.formatting.astyle }
 - Command: `astyle`
 - Args: `{ "--quiet" }`
 
+### [atlas_fmt](https://atlasgo.io/cli-reference#atlas-schema-fmt)
+
+atlas fmt command rewrites `atlas` config and schema files to a canonical format and style.
+
+#### Usage
+
+```lua
+local sources = { null_ls.builtins.formatting.atlas_fmt }
+```
+
+#### Defaults
+
+- Filetypes: `{ "hcl", "atlas-config", "atlas-schema-mysql", "atlas-schema-sqlite", "atlas-schema-mariadb", "atlas-schema-redshift", "atlas-schema-clickhouse", "atlas-schema-postgresql", "atlas-schema-mssql", "atlas-plan", "atlas-test"}`
+- Method: `formatting`
+- Command: `atlas`
+- Args: `{ "schema", "fmt", "$FILENAME" }`
+
 ### [bean_format](https://beancount.github.io/docs/running_beancount_and_generating_reports.html#bean-format)
 
 This pure text processing tool will reformat `beancount` input to right-align all the numbers at the same, minimal column.

lua/null-ls/builtins/formatting/atlas_fmt.lua

@@ -0,0 +1,37 @@
+local h = require("null-ls.helpers")
+local methods = require("null-ls.methods")
+
+local FORMATTING = methods.internal.FORMATTING
+
+return h.make_builtin({
+    name = "atlas_fmt",
+    meta = {
+        url = "https://atlasgo.io/cli-reference#atlas-schema-fmt",
+        description = "atlas fmt command rewrites `atlas` config and schema files to a canonical format and style.",
+    },
+    method = FORMATTING,
+    filetypes = {
+        "hcl",
+        "atlas-config",
+        "atlas-schema-mysql",
+        "atlas-schema-sqlite",
+        "atlas-schema-mariadb",
+        "atlas-schema-redshift",
+        "atlas-schema-clickhouse",
+        "atlas-schema-postgresql",
+        "atlas-schema-mssql",
+        "atlas-plan",
+        "atlas-test",
+    },
+    generator_opts = {
+        command = "atlas",
+        to_temp_file = true,
+        from_temp_file = true,
+        args = {
+            "schema",
+            "fmt",
+            "$FILENAME",
+        },
+    },
+    factory = h.formatter_factory,
+})