Added first draft database schema

migrations/2021-06-27-131430_initial_schema/down.sql

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+-- This file should undo anything in `up.sql`
+DROP TABLE packages;
+DROP TABLE maintainers;
+DROP TYPE package_type;

migrations/2021-06-27-131430_initial_schema/up.sql

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+CREATE TABLE maintainers (
+    id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
+
+    name text NOT NULL,
+    email text NOT NULL,
+
+    UNIQUE (name, email)
+);
+
+CREATE TYPE package_type AS ENUM ('deb',  'dsc', 'udeb');
+
+-- Table containing information about a package
+CREATE TABLE packages (
+    id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
+
+    name text NOT NULL,
+    type package_type NOT NULL,
+    version text NOT NULL,
+    -- This is just text, as there's no guarantee the source is present on this
+    -- repository.
+    source text,
+    section text,
+    priority text,
+    -- NOTE: could this be better than just text?
+    architecture text NOT NULL,
+    essential boolean DEFAULT false,
+    installed_size integer,
+    maintainer_id uuid REFERENCES maintainers (id) NOT NULL,
+    description text NOT NULL,
+    homepage text,
+
+    -- NOTE: I don't think this is enough because architecture can be a wildcard
+    UNIQUE (name, version, architecture)
+);

src/schema.rs

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+table! {
+    maintainers (id) {
+        id -> Uuid,
+        name -> Text,
+        email -> Text,
+    }
+}
+
+table! {
+    packages (id) {
+        id -> Uuid,
+        name -> Text,
+        #[sql_name = "type"]
+        type_ -> Package_type,
+        version -> Text,
+        source -> Nullable<Text>,
+        section -> Nullable<Text>,
+        priority -> Nullable<Text>,
+        architecture -> Text,
+        essential -> Nullable<Bool>,
+        installed_size -> Nullable<Int4>,
+        maintainer_id -> Uuid,
+        description -> Text,
+        homepage -> Nullable<Text>,
+    }
+}
+
+joinable!(packages -> maintainers (maintainer_id));
+
+allow_tables_to_appear_in_same_query!(
+    maintainers,
+    packages,
+);