-- This table contains all builds, either scheduled or finished.  For
-- scheduled builds, additional info (such as the priority) can be
-- found in the BuildSchedulingInfo table.  For finished builds,
-- additional info (such as the logs, build products, etc.) can be
-- found in several tables, such as BuildResultInfo and BuildProducts.
create table Builds (
    id            integer primary key autoincrement not null,

    finished      integer not null, -- 0 = scheduled, 1 = finished
    
    timestamp     integer not null, -- time this build was scheduled / finished building

    -- Info about the inputs.
    project       text not null, -- !!! foreign key
    jobset        text not null, -- !!! foreign key
    attrName      text not null,

    -- Info about the build result.
    nixName       text, -- name attribute of the derivation
    description   text, -- meta.description
    drvPath       text not null,
    outPath       text not null,
    system        text not null,

    longDescription text, -- meta.longDescription
    license       text, -- meta.license
    homepage      text, -- meta.homepage
    
    foreign key   (project) references Projects(name), -- ignored by sqlite
    foreign key   (project, jobset) references Jobsets(project, name) -- ignored by sqlite
);


-- Info for a scheduled build.
create table BuildSchedulingInfo (
    id            integer primary key not null,
    
    priority      integer not null default 0,

    busy          integer not null default 0, -- true means someone is building this job now
    locker        text not null default '', -- !!! hostname/pid of the process building this job?

    logfile       text, -- if busy, the path of the logfile

    disabled      integer not null default 0, -- true means hold this job until its re-enabled
    
    startTime     integer, -- if busy, time we started
    
    foreign key   (id) references Builds(id) on delete cascade -- ignored by sqlite
);


-- Info for a finished build.
create table BuildResultInfo (
    id            integer primary key not null,
    
    isCachedBuild integer not null, -- boolean

    -- Status codes:
    --   0 = succeeded
    --   1 = build of this derivation failed
    --   2 = build of some dependency failed
    --   3 = other failure (see errorMsg)
    buildStatus   integer,

    errorMsg      text, -- error message in case of a Nix failure
    
    startTime     integer, -- in Unix time, 0 = used cached build result
    stopTime      integer,

    logfile       text, -- the path of the logfile

    releaseName   text, -- e.g. "patchelf-0.5pre1234"

    keep          integer not null default 0, -- true means never garbage-collect the build output
    
    foreign key   (id) references Builds(id) on delete cascade -- ignored by sqlite
);


create table BuildSteps (
    id            integer not null,
    stepnr        integer not null,

    type          integer not null, -- 0 = build, 1 = substitution

    drvPath       text, 
    outPath       text,

    logfile       text,

    busy          integer not null,

    status        integer, -- 0 = success, 1 = failed

    errorMsg      text,

    startTime     integer,
    stopTime      integer,

    primary key   (id, stepnr),
    foreign key   (id) references Builds(id) on delete cascade -- ignored by sqlite
);


-- Inputs of builds.
create table BuildInputs ( 
    id            integer primary key autoincrement not null,

    -- Which build this input belongs to.
    build         integer,
    
    -- Copied from the jobsetinputs from which the build was created.
    name          text not null,
    type          text not null,
    uri           text,
    revision      integer,
    tag           text,
    value         text,
    dependency    integer, -- build ID of the input, for type == 'build'

    path          text,
    
    sha256hash    text,
    
    foreign key   (build) references Builds(id) on delete cascade, -- ignored by sqlite
    foreign key   (dependency) references Builds(id) -- ignored by sqlite
);


create table BuildProducts (
    build         integer not null,
    productnr     integer not null,
    type          text not null, -- "nix-build", "file", "doc", "report", ...
    subtype       text not null, -- "source-dist", "rpm", ...
    fileSize      integer,
    sha1hash      text,
    sha256hash    text,
    path          text,
    name          text not null, -- generally just the filename part of `path'
    description   text, -- optionally, some description of this file/directory
    primary key   (build, productnr),
    foreign key   (build) references Builds(id) on delete cascade -- ignored by sqlite
);


-- Emulate "on delete cascade" foreign key constraints.
create trigger cascadeBuildDeletion
  before delete on Builds
  for each row begin
    delete from BuildSchedulingInfo where id = old.id;
    delete from BuildResultInfo where id = old.id;
    delete from BuildInputs where build = old.id;
    delete from BuildProducts where build = old.id;
  end;


create table Projects (
    name          text primary key not null, -- project id, lowercase (e.g. "patchelf")
    displayName   text not null, -- display name (e.g. "PatchELF")
    description   text,
    enabled       integer not null default 1,
    owner         text not null,
    homepage      text, -- URL for the project
    foreign key   (owner) references Users(userName) -- ignored by sqlite
);


create trigger cascadeProjectUpdate
  update of name on Projects
  for each row begin
    update Jobsets set project = new.name where project = old.name;
    update JobsetInputs set project = new.name where project = old.name;
    update JobsetInputAlts set project = new.name where project = old.name;
    update Builds set project = new.name where project = old.name;
    update ReleaseSets set project = new.name where project = old.name;
    update ReleaseSetJobs set project = new.name where project = old.name;
  end;


-- A jobset consists of a set of inputs (e.g. SVN repositories), one
-- of which contains a Nix expression containing an attribute set
-- describing build jobs.
create table Jobsets (
    name          text not null,
    project       text not null,
    description   text,
    nixExprInput  text not null, -- name of the jobsetInput containing the Nix expression
    nixExprPath   text not null, -- relative path of the Nix expression
    errorMsg      text, -- used to signal the last evaluation error etc. for this jobset
    errorTime     integer, -- timestamp associated with errorMsg
    lastCheckedTime integer, -- last time the scheduler looked at this jobset
    primary key   (project, name),
    foreign key   (project) references Projects(name) on delete cascade, -- ignored by sqlite
    foreign key   (project, name, nixExprInput) references JobsetInputs(project, job, name)
);


create trigger cascadeJobsetUpdate
  update of name on Jobsets
  for each row begin
    update JobsetInputs set jobset = new.name where project = old.project and jobset = old.name;
    update JobsetInputAlts set jobset = new.name where project = old.project and jobset = old.name;
    update Builds set jobset = new.name where project = old.project and jobset = old.name;
  end;


create table JobsetInputs (
    project       text not null,
    jobset        text not null,
    name          text not null,
    type          text not null, -- "svn", "cvs", "path", "uri", "string", "boolean"
    primary key   (project, jobset, name),
    foreign key   (project, jobset) references Jobsets(project, name) on delete cascade -- ignored by sqlite
);


create trigger cascadeJobsetInputUpdate
  update of name on JobsetInputs
  for each row begin
    update JobsetInputAlts set input = new.name where project = old.project and jobset = old.jobset and input = old.name;
  end;


create trigger cascadeJobsetInputDelete
  before delete on JobsetInputs
  for each row begin
    delete from JobsetInputAlts where project = old.project and jobset = old.jobset and input = old.name;
  end;


create table JobsetInputAlts (
    project       text not null,
    jobset        text not null,
    input         text not null,
    altnr         integer not null,

    -- urgh
    value         text, -- for most types, a URI; for 'path', an absolute path; for 'string', an arbitrary value
    revision      integer, -- for type == 'svn'
    tag           text, -- for type == 'cvs'
    
    primary key   (project, jobset, input, altnr),
    foreign key   (project, jobset, input) references JobsetInputs(project, jobset, name) on delete cascade -- ignored by sqlite
);


-- Cache for inputs of type "path" (used for testing Hydra), storing
-- the SHA-256 hash and store path for each source path.  Also stores
-- the timestamp when we first saw the path have these contents, which
-- may be used to generate release names.
create table CachedPathInputs (
    srcPath       text not null,
    timestamp     integer not null, -- when we first saw this hash
    lastSeen      integer not null, -- when we last saw this hash
    sha256hash    text not null,
    storePath     text not null,
    primary key   (srcPath, sha256hash)
);


create table CachedSubversionInputs (
    uri           text not null,
    revision      integer not null,
    sha256hash    text not null,
    storePath     text not null,
    primary key   (uri, revision)
);


create table SystemTypes (
    system        text primary key not null,
    maxConcurrent integer not null default 2
);


create table Users (
    userName      text primary key not null,
    fullName      text,
    emailAddress  text not null,
    password      text not null -- sha256 hash
);


create table UserRoles (
    userName      text not null,
    role          text not null,
    primary key   (userName, role),
    foreign key   (userName) references Users(userName) -- ignored by sqlite
);


create trigger cascadeUserDelete
  before delete on Users
  for each row begin
    delete from UserRoles where userName = old.userName;
  end;


-- Release sets are a mechanism to automatically group related builds
-- together.  A release set defines what an individual release
-- consists of, namely: a release consists of a build of some
-- "primary" job, plus all builds of the other jobs named in
-- ReleaseSetJobs that have that build as an input.  If there are
-- multiple builds matching a ReleaseSetJob, then we take the oldest
-- successful build, or the oldest unsuccessful build if there is no
-- successful build.  A release is itself considered successful if all
-- builds (except those for jobs that have mayFail set) are
-- successful.
--
-- Note that individual releases aren't separately stored in the
-- database, so they're really just a dynamic view on the universe of
-- builds, defined by a ReleaseSet.
create table ReleaseSets (
    project       text not null,
    name          text not null,
    
    description   text,

    -- If true, don't garbage-collect builds belonging to the releases
    -- defined by this row.
    keep          integer not null default 0, 

    primary key   (project, name),
    foreign key   (project) references Projects(name) on delete cascade -- ignored by sqlite
);


create trigger cascadeReleaseSetDelete
  before delete on ReleaseSets
  for each row begin
    delete from ReleaseSetJobs where project = old.project and release = old.name;
  end;


create trigger cascadeReleaseSetUpdate
  update of name on ReleaseSets
  for each row begin
    update ReleaseSetJobs set release = new.name where project = old.project and release = old.name;
  end;


create table ReleaseSetJobs (
    project       text not null,
    -- !!! urgh: "release" is a reserved keyword in sqlite >= 3.6.8!
    release       text not null,

    job           text not null,

    -- A constraint on the job consisting of `name=value' pairs,
    -- e.g. "system=i686-linux officialRelease=true".  Should really
    -- be a separate table but I'm lazy.
    attrs         text not null,

    -- If set, this is the primary job for the release.  There can be
    -- onlyt one such job per release set.
    isPrimary     integer not null default 0,
    
    mayFail       integer not null default 0,

    description   text,
    
    primary key   (project, release, job, attrs),
    foreign key   (project) references Projects(name) on delete cascade, -- ignored by sqlite
    foreign key   (project, release) references ReleaseSets(project, name) on delete cascade -- ignored by sqlite
);