Make preparations for first upgrade release

- Create `CHANGELOG.txt` file
- Bump ENGINE_DATABASE_VERSION
- Add an upgrade-testing step to the CI build

.build.yml

@@ -95,6 +95,33 @@ tasks:
       duration=$SECONDS
       echo "Task completed in $(($duration / 60))m$(($duration % 60))s."
 
+  - version_bump_test: |
+      SECONDS=0
+
+      sudo apt install -y curl gnupg
+      sudo curl https://apt.playfulpachyderm.com/KEY.gpg | apt-key add -
+      sudo echo "deb https://apt.playfulpachyderm.com/ ./" > /etc/apt/sources.list.d/offline_twitter.list
+      sudo apt update
+
+      sudo apt install -y offline-twitter-engine  # Latest released version
+      which twitter  # Ensure that it got installed
+
+      cd twitter_offline_engine/cmd
+      twitter create_profile outdated_profile
+      cd outdated_profile
+
+      # Create some sample data
+      twitter fetch_user michaelmalice
+      twitter get_user_tweets michaelmalice
+
+      # Now test the upgrade using the newer version
+      cd ..  # Now in `cmd` directory
+      which ./tw  # Should be here from previous step
+      tw fetch_user michaelmalice  # Any operation other than `create_profile` should trigger the upgrade
+
+      duration=$SECONDS
+      echo "Task completed in $(($duration / 60))m$(($duration % 60))s."
+
   - dpkg_build_and_upload: |
       SECONDS=0
 

CHANGELOG.txt

@@ -0,0 +1,12 @@
+Changelog
+=========
+
+v0.0.0
+------
+
+- Initial release.
+
+v0.0.1
+------
+
+- Added polls

build/build_dpkg.sh

@@ -35,8 +35,8 @@ Section: web
 Priority: optional
 Homepage: http://offline-twitter.com
 Description: This utility is the scraper engine that drives \`offline-twitter\`.
- Download and browse content from twitter.
- Save a local copy of everything you browse to a SQLite database.
+ Download and browse content from twitter.  Everything you browse gets saved as
+ a local copy into a SQLite database on your computer.
 " > dpkg_tmp/DEBIAN/control
 
 

persistence/profile_test.go

@@ -111,8 +111,8 @@ func TestNewProfile(t *testing.T) {
 	if err != nil {
 		panic(err)
 	}
-	if version != 0 {
-		t.Errorf("Expected database version %d, but got %d", 0, version)
+	if version != persistence.ENGINE_DATABASE_VERSION {
+		t.Errorf("Expected database version %d, but got %d", persistence.ENGINE_DATABASE_VERSION, version)
 	}
 }
 

persistence/versions.go

@@ -6,7 +6,7 @@ import (
 )
 
 
-const ENGINE_DATABASE_VERSION = 0
+const ENGINE_DATABASE_VERSION = 1
 
 
 type VersionMismatchError struct {
@@ -26,7 +26,27 @@ Please upgrade this application to a newer version to use this profile.  Or down
  * The Nth entry is the migration that moves you from version N to version N+1
  */
 var MIGRATIONS = []string{
+`create table polls (rowid integer primary key,
+    id integer unique not null check(typeof(id) = 'integer'),
+    tweet_id integer not null,
+    num_choices integer not null,
 
+    choice1 text,
+    choice1_votes integer,
+    choice2 text,
+    choice2_votes integer,
+    choice3 text,
+    choice3_votes integer,
+    choice4 text,
+    choice4_votes integer,
+
+    voting_duration integer not null,  -- in seconds
+    voting_ends_at integer not null,
+
+    last_scraped_at integer not null,
+
+    foreign key(tweet_id) references tweets(id)
+);`,
 }
 
 /**