add FromStr, Copy, PartialEq, Eq impls for sqlite options (#1784)

Signed-off-by: Andrew Whitehead <cywolf@gmail.com>

sqlx-core/src/sqlite/options/auto_vacuum.rs

@@ -1,4 +1,7 @@
-#[derive(Debug, Clone)]
+use crate::error::Error;
+use std::str::FromStr;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum SqliteAutoVacuum {
     None,
     Full,
@@ -20,3 +23,21 @@ impl Default for SqliteAutoVacuum {
         SqliteAutoVacuum::None
     }
 }
+
+impl FromStr for SqliteAutoVacuum {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Error> {
+        Ok(match &*s.to_ascii_lowercase() {
+            "none" => SqliteAutoVacuum::None,
+            "full" => SqliteAutoVacuum::Full,
+            "incremental" => SqliteAutoVacuum::Incremental,
+
+            _ => {
+                return Err(Error::Configuration(
+                    format!("unknown value {:?} for `auto_vacuum`", s).into(),
+                ));
+            }
+        })
+    }
+}

sqlx-core/src/sqlite/options/journal_mode.rs

@@ -1,7 +1,10 @@
 use crate::error::Error;
 use std::str::FromStr;
 
-#[derive(Debug, Clone)]
+/// Refer to [SQLite documentation] for the meaning of the database journaling mode.
+///
+/// [SQLite documentation]: https://www.sqlite.org/pragma.html#pragma_journal_mode
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum SqliteJournalMode {
     Delete,
     Truncate,

sqlx-core/src/sqlite/options/locking_mode.rs

@@ -1,4 +1,10 @@
-#[derive(Debug, Clone)]
+use crate::error::Error;
+use std::str::FromStr;
+
+/// Refer to [SQLite documentation] for the meaning of the connection locking mode.
+///
+/// [SQLite documentation]: https://www.sqlite.org/pragma.html#pragma_locking_mode
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum SqliteLockingMode {
     Normal,
     Exclusive,
@@ -18,3 +24,20 @@ impl Default for SqliteLockingMode {
         SqliteLockingMode::Normal
     }
 }
+
+impl FromStr for SqliteLockingMode {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Error> {
+        Ok(match &*s.to_ascii_lowercase() {
+            "normal" => SqliteLockingMode::Normal,
+            "exclusive" => SqliteLockingMode::Exclusive,
+
+            _ => {
+                return Err(Error::Configuration(
+                    format!("unknown value {:?} for `locking_mode`", s).into(),
+                ));
+            }
+        })
+    }
+}

sqlx-core/src/sqlite/options/synchronous.rs

@@ -4,7 +4,7 @@ use std::str::FromStr;
 /// Refer to [SQLite documentation] for the meaning of various synchronous settings.
 ///
 /// [SQLite documentation]: https://www.sqlite.org/pragma.html#pragma_synchronous
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum SqliteSynchronous {
     Off,
     Normal,