v2: add linter (#434)

copying over yet another crate

Author: sbdchd

Cargo.lock

@@ -34,13 +34,16 @@ camino = "1.1.9"
 pg_query = "6.1.0"
 rowan = "0.15.15"
 smol_str = "0.3.2"
+enum-iterator = "2.1.0"
+line-index = "0.1.2"
 
 # local
 squawk-parser = { version = "0.0.0", path = "./crates/parser" }
 squawk-linter = { version = "0.0.0", path = "./crates/linter" }
 squawk-github = { version = "0.0.0", path = "./crates/github" }
 squawk_lexer = { version = "0.0.0", path = "./crates/squawk_lexer" }
 squawk_parser = { version = "0.0.0", path = "./crates/squawk_parser" }
+squawk_syntax = { version = "0.0.0", path = "./crates/squawk_syntax" }
 
 [workspace.lints.clippy]
 collapsible_else_if = "allow"

Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "squawk_linter"
+version = "0.0.0"
+edition.workspace = true
+rust-version.workspace = true
+authors.workspace = true
+license.workspace = true
+
+[dependencies]
+squawk_syntax.workspace = true
+
+rowan.workspace = true
+serde.workspace = true
+lazy_static.workspace = true
+insta.workspace = true
+enum-iterator.workspace = true
+line-index.workspace = true
+
+
+[lints]
+workspace = true

crates/squawk_linter/Cargo.toml

@@ -0,0 +1,31 @@
+# linter
+
+## rules
+
+| name                                         | done? |
+| -------------------------------------------- | ----- |
+| adding_field_with_default                    | y     |
+| adding_foreign_key_constraint                | y     |
+| adding_not_null_field                        | y     |
+| adding_primary_key_constraint                | y     |
+| adding_required_field                        | y     |
+| ban_char_field                               | y     |
+| ban_concurrent_index_creation_in_transaction | y     |
+| ban_drop_column                              | y     |
+| ban_drop_database                            | y     |
+| ban_drop_not_null                            | y     |
+| ban_drop_table                               | y     |
+| changing_column_type                         | y     |
+| constraint_missing_not_valid                 | y     |
+| disallow_unique_constraint                   | y     |
+| prefer_big_int                               | y     |
+| prefer_bigint_over_int                       | y     |
+| prefer_bigint_over_smallint                  | y     |
+| prefer_identity                              | y     |
+| prefer_robust_stmts                          | y     |
+| prefer_text_field                            | y     |
+| prefer_timestamptz                           | y     |
+| renaming_column                              | y     |
+| renaming_table                               | y     |
+| require_concurrent_index_creation            | y     |
+| require_concurrent_index_deletion            | y     |