refactor: Replace interpolatedstring-perl6 with neat-interpolation

The former depends on th-orphans which does not cross-compile well,
because of template haskell usage.

neat-interpolation is also much better maintained.

This also potentially helps with packaging for Debian/Ubuntu in PostgREST#2273.

postgrest.cabal

@@ -116,11 +116,11 @@ library
                     , heredoc                   >= 0.2 && < 0.3
                     , http-types                >= 0.12.2 && < 0.13
                     , insert-ordered-containers >= 0.2.2 && < 0.3
-                    , interpolatedstring-perl6  >= 1 && < 1.1
                     , jose                      >= 0.8.5.1 && < 0.12
                     , lens                      >= 4.14 && < 5.3
                     , lens-aeson                >= 1.0.1 && < 1.3
                     , mtl                       >= 2.2.2 && < 2.4
+                    , neat-interpolation        >= 0.5 && < 0.6
                     , network                   >= 2.6 && < 3.2
                     , network-uri               >= 2.6.1 && < 2.8
                     , optparse-applicative      >= 0.13 && < 0.19

src/PostgREST/Config/Database.hs

@@ -24,7 +24,7 @@ import qualified Hasql.Statement            as SQL
 import qualified Hasql.Transaction          as SQL
 import qualified Hasql.Transaction.Sessions as SQL
 
-import Text.InterpolatedString.Perl6 (q, qc)
+import NeatInterpolation (trimming)
 
 import Protolude
 
@@ -95,7 +95,7 @@ queryDbSettings preConfFunc prepared =
   let transaction = if prepared then SQL.transaction else SQL.unpreparedTransaction in
   transaction SQL.ReadCommitted SQL.Read $ SQL.statement dbSettingsNames $ SQL.Statement sql (arrayParam HE.text) decodeSettings prepared
   where
-    sql = [qc|
+    sql = encodeUtf8 [trimming|
       WITH
       role_setting AS (
         SELECT setdatabase as database,
@@ -109,25 +109,25 @@ queryDbSettings preConfFunc prepared =
                substr(setting, 1, strpos(setting, '=') - 1) as k,
                substr(setting, strpos(setting, '=') + 1) as v
         FROM role_setting
-        {preConfigF}
+        ${preConfigF}
       )
       SELECT DISTINCT ON (key)
              replace(k, '{prefix}', '') AS key,
              v AS value
       FROM kv_settings
-      WHERE k = ANY($1) AND v IS NOT NULL
+      WHERE k = ANY($$1) AND v IS NOT NULL
       ORDER BY key, database DESC NULLS LAST;
     |]
     preConfigF = case preConfFunc of
       Nothing   -> mempty
-      Just func -> [qc|
+      Just func -> [trimming|
           UNION
           SELECT
             null as database,
             x as k,
             current_setting(x, true) as v
-          FROM unnest($1) x
-          JOIN {func}() _ ON TRUE
+          FROM unnest($$1) x
+          JOIN ${func}() _ ON TRUE
       |]::Text
     decodeSettings = HD.rowList $ (,) <$> column HD.text <*> column HD.text
 
@@ -136,7 +136,7 @@ queryRoleSettings pgVer prepared =
   let transaction = if prepared then SQL.transaction else SQL.unpreparedTransaction in
   transaction SQL.ReadCommitted SQL.Read $ SQL.statement mempty $ SQL.Statement sql HE.noParams (processRows <$> rows) prepared
   where
-    sql = [q|
+    sql = encodeUtf8 [trimming|
       with
       role_setting as (
         select r.rolname, unnest(r.rolconfig) as setting
@@ -164,7 +164,7 @@ queryRoleSettings pgVer prepared =
       join pg_settings ps on ps.name = kv.key |] <>
       (if pgVer >= pgVersion150
         then "and (ps.context = 'user' or has_parameter_privilege(current_user::regrole::oid, ps.name, 'set')) "
-        else "and ps.context = 'user' ") <> [q|
+        else "and ps.context = 'user' ") <> encodeUtf8 [trimming|
       left join iso_setting i on i.rolname = kv.rolname
       group by kv.rolname, i.value;
     |]

src/PostgREST/Query/SqlFragment.hs

@@ -53,8 +53,8 @@ import qualified Hasql.Encoders                  as HE
 
 import Control.Arrow ((***))
 
-import Data.Foldable                 (foldr1)
-import Text.InterpolatedString.Perl6 (qc)
+import Data.Foldable     (foldr1)
+import NeatInterpolation (trimming)
 
 import PostgREST.ApiRequest.Types        (AggregateFunction (..),
                                           Alias, Cast,
@@ -229,11 +229,11 @@ customFuncF _ funcQi RelAnyElement            = fromQi funcQi <> "(_postgrest_t)
 customFuncF _ funcQi (RelId target)           = fromQi funcQi <> "(_postgrest_t::" <> fromQi target <> ")"
 
 locationF :: [Text] -> SQL.Snippet
-locationF pKeys = [qc|(
-  WITH data AS (SELECT row_to_json(_) AS row FROM {sourceCTEName} AS _ LIMIT 1)
+locationF pKeys = SQL.sql $ encodeUtf8 [trimming|(
+  WITH data AS (SELECT row_to_json(_) AS row FROM ${sourceCTEName} AS _ LIMIT 1)
   SELECT array_agg(json_data.key || '=' || coalesce('eq.' || json_data.value, 'is.null'))
   FROM data CROSS JOIN json_each_text(data.row) AS json_data
-  WHERE json_data.key IN ('{fmtPKeys}')
+  WHERE json_data.key IN ('${fmtPKeys}')
 )|]
   where
     fmtPKeys = T.intercalate "','" pKeys

src/PostgREST/SchemaCache.hs

@@ -40,8 +40,8 @@ import qualified Hasql.Encoders             as HE
 import qualified Hasql.Statement            as SQL
 import qualified Hasql.Transaction          as SQL
 
-import Contravariant.Extras          (contrazip2)
-import Text.InterpolatedString.Perl6 (q)
+import Contravariant.Extras (contrazip2)
+import NeatInterpolation    (trimming)
 
 import PostgREST.Config                      (AppConfig (..))
 import PostgREST.Config.Database             (TimezoneNames,
@@ -339,7 +339,7 @@ decodeRepresentations =
 dataRepresentations :: Bool -> SQL.Statement [Schema] RepresentationsMap
 dataRepresentations = SQL.Statement sql (arrayParam HE.text) decodeRepresentations
   where
-    sql = [q|
+    sql = encodeUtf8 [trimming|
     SELECT
       c.castsource::regtype::text,
       c.casttarget::regtype::text,
@@ -369,7 +369,7 @@ accessibleFuncs = SQL.Statement sql (contrazip2 (param HE.text) (arrayParam HE.t
     sql = funcsSqlQuery <> " AND pn.nspname = $1 AND has_function_privilege(p.oid, 'execute')"
 
 funcsSqlQuery :: SqlQuery
-funcsSqlQuery = [q|
+funcsSqlQuery = encodeUtf8 [trimming|
  -- Recursively get the base types of domains
   WITH
   base_types AS (
@@ -454,7 +454,7 @@ funcsSqlQuery = [q|
         substr(setting, strpos(setting, '=') + 1)
       )) as kvs
     FROM unnest(proconfig) setting
-    WHERE setting ~ ANY($2)
+    WHERE setting ~ ANY($$2)
   ) func_settings ON TRUE
   WHERE t.oid <> 'trigger'::regtype AND COALESCE(a.callable, true)
   AND prokind = 'f'|]
@@ -463,28 +463,28 @@ schemaDescription :: Bool -> SQL.Statement Schema (Maybe Text)
 schemaDescription =
     SQL.Statement sql (param HE.text) (join <$> HD.rowMaybe (nullableColumn HD.text))
   where
-    sql = [q|
+    sql = encodeUtf8 [trimming|
       select
         description
       from
         pg_namespace n
         left join pg_description d on d.objoid = n.oid
       where
-        n.nspname = $1 |]
+        n.nspname = $$1 |]
 
 accessibleTables :: Bool -> SQL.Statement [Schema] AccessSet
 accessibleTables =
   SQL.Statement sql (arrayParam HE.text) decodeAccessibleIdentifiers
  where
-  sql = [q|
+  sql = encodeUtf8 [trimming|
     SELECT
       n.nspname AS table_schema,
       c.relname AS table_name
     FROM pg_class c
     JOIN pg_namespace n ON n.oid = c.relnamespace
     WHERE c.relkind IN ('v','r','m','f','p')
     AND n.nspname NOT IN ('pg_catalog', 'information_schema')
-    AND n.nspname = ANY($1)
+    AND n.nspname = ANY($$1)
     AND (
       pg_has_role(c.relowner, 'USAGE')
       or has_table_privilege(c.oid, 'SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER')
@@ -611,7 +611,7 @@ tablesSqlQuery =
   -- (pg_has_role(ss.relowner, 'USAGE'::text) OR has_column_privilege(ss.roid, a.attnum, 'SELECT, INSERT, UPDATE, REFERENCES'::text));
   -- on the "columns" CTE, left joining on pg_depend and pg_class is used to obtain the sequence name as a column default in case there are GENERATED .. AS IDENTITY,
   -- generated columns are only available from pg >= 10 but the query is agnostic to versions. dep.deptype = 'i' is done because there are other 'a' dependencies on PKs
-  [q|
+  encodeUtf8 [trimming|
   WITH
   columns AS (
       SELECT
@@ -670,7 +670,7 @@ tablesSqlQuery =
           AND a.attnum > 0
           AND NOT a.attisdropped
           AND c.relkind in ('r', 'v', 'f', 'm', 'p')
-          AND nc.nspname = ANY($1)
+          AND nc.nspname = ANY($$1)
   ),
   columns_agg AS (
     SELECT DISTINCT
@@ -818,7 +818,7 @@ allM2OandO2ORels =
   SQL.Statement sql HE.noParams decodeRels
  where
   -- We use jsonb_agg for comparing the uniques/pks instead of array_agg to avoid the ERROR:  cannot accumulate arrays of different dimensionality
-  sql = [q|
+  sql = encodeUtf8 [trimming|
     WITH
     pks_uniques_cols AS (
       SELECT
@@ -867,7 +867,7 @@ allComputedRels :: Bool -> SQL.Statement () [Relationship]
 allComputedRels =
   SQL.Statement sql HE.noParams (HD.rowList cRelRow)
  where
-  sql = [q|
+  sql = encodeUtf8 [trimming|
     with
     all_relations as (
       select reltype
@@ -916,7 +916,7 @@ allViewsKeyDependencies =
   --  * rationale: https://gist.github.com/wolfgangwalther/5425d64e7b0d20aad71f6f68474d9f19
   --  * json transformation: https://gist.github.com/wolfgangwalther/3a8939da680c24ad767e93ad2c183089
   where
-    sql = [q|
+    sql = encodeUtf8 [trimming|
       with recursive
       pks_fks as (
         -- pk + fk referencing col
@@ -952,7 +952,7 @@ allViewsKeyDependencies =
         from pg_class c
         join pg_namespace n on n.oid = c.relnamespace
         join pg_rewrite r on r.ev_class = c.oid
-        where c.relkind in ('v', 'm') and n.nspname = ANY($1 || $2)
+        where c.relkind in ('v', 'm') and n.nspname = ANY($$1 || $$2)
       ),
       transform_json as (
         select
@@ -1056,7 +1056,7 @@ allViewsKeyDependencies =
           false,
           ARRAY[resorigtbl]
         from results r
-        where view_schema = ANY ($1)
+        where view_schema = ANY ($$1)
         union all
         select
           view.view_id,
@@ -1118,7 +1118,7 @@ mediaHandlers :: Bool -> SQL.Statement [Schema] MediaHandlerMap
 mediaHandlers =
   SQL.Statement sql (arrayParam HE.text) decodeMediaHandlers
   where
-    sql = [q|
+    sql = encodeUtf8 [trimming|
       with
       all_relations as (
         select reltype
@@ -1144,7 +1144,7 @@ mediaHandlers =
           JOIN pg_type b ON t.typbasetype = b.oid
           WHERE
             t.typbasetype <> 0 and
-            (t.typname ~* '^[A-Za-z0-9.-]+/[A-Za-z0-9.\+-]+$' or t.typname = '*/*')
+            (t.typname ~* '^[A-Za-z0-9.-]+/[A-Za-z0-9.\+-]+$$' or t.typname = '*/*')
       )
       select
         proc_schema.nspname           as handler_schema,
@@ -1160,7 +1160,7 @@ mediaHandlers =
         join pg_type      arg_name     on arg_name.oid = proc.proargtypes[0]
         join pg_namespace arg_schema   on arg_schema.oid = arg_name.typnamespace
       where
-        proc_schema.nspname = ANY($1) and
+        proc_schema.nspname = ANY($$1) and
         proc.pronargs = 1 and
         arg_name.oid in (select reltype from all_relations)
       union
@@ -1176,7 +1176,7 @@ mediaHandlers =
         join media_types mtype on proc.prorettype = mtype.oid
         join pg_namespace typ_sch     on typ_sch.oid = mtype.typnamespace
       where
-        pro_sch.nspname = ANY($1) and NOT proretset
+        pro_sch.nspname = ANY($$1) and NOT proretset
         and prokind = 'f'|]
 
 decodeMediaHandlers :: HD.Result MediaHandlerMap