require 'formula'

class Sqlite < Formula
  homepage 'http://sqlite.org/'
  url 'http://sqlite.org/2014/sqlite-autoconf-3080403.tar.gz'
  version '3.8.4.3'
  sha1 '70f3b100fa22e5bfebfe1b0a2102612e3c6c53fb'

  bottle do
    cellar :any
    sha1 "f8099e15c5ffd67f861ea09651cb7ae0c4dfa359" => :mavericks
    sha1 "c25f37d9cd188465dd568e9f49c22b95a2320835" => :mountain_lion
    sha1 "d40eacfc3df225d16dc0908bf450b47a27a27d44" => :lion
  end

  keg_only :provided_by_osx, "OS X provides an older sqlite3."

  option :universal
  option 'with-docs', 'Install HTML documentation'
  option 'without-rtree', 'Disable the R*Tree index module'
  option 'with-fts', 'Enable the FTS module'
  option 'with-icu4c', 'Enable the ICU module'
  option 'with-functions', 'Enable more math and string functions for SQL queries'

  depends_on 'readline' => :recommended
  depends_on 'icu4c' => :optional

  resource 'functions' do
    url 'http://www.sqlite.org/contrib/download/extension-functions.c?get=25', :using  => :nounzip
    version '2010-01-06'
    sha1 'c68fa706d6d9ff98608044c00212473f9c14892f'
  end

  resource 'docs' do
    url 'http://sqlite.org/2014/sqlite-doc-3080403.zip'
    version '3.8.4.3'
    sha1 'ce8615799a9da7fc9d2cbcd2774d77da4ba72417'
  end

  def install
    ENV.append 'CPPFLAGS', "-DSQLITE_ENABLE_RTREE" if build.with? "rtree"
    ENV.append 'CPPFLAGS', "-DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS" if build.with? "fts"
    ENV.append 'CPPFLAGS', "-DSQLITE_ENABLE_COLUMN_METADATA"

    if build.with? "icu4c"
      icu4c = Formula['icu4c']
      icu4cldflags = `#{icu4c.opt_bin}/icu-config --ldflags`.tr("\n", " ")
      icu4ccppflags = `#{icu4c.opt_bin}/icu-config --cppflags`.tr("\n", " ")
      ENV.append "LDFLAGS", icu4cldflags
      ENV.append "CPPFLAGS", icu4ccppflags
      ENV.append 'CPPFLAGS', "-DSQLITE_ENABLE_ICU"
    end

    ENV.universal_binary if build.universal?

    system "./configure", "--prefix=#{prefix}", "--disable-dependency-tracking", "--enable-dynamic-extensions"
    system "make install"

    if build.with? "functions"
      buildpath.install resource('functions')
      system ENV.cc, "-fno-common",
                     "-dynamiclib",
                     "extension-functions.c",
                     "-o", "libsqlitefunctions.dylib",
                     *ENV.cflags.to_s.split
      lib.install "libsqlitefunctions.dylib"
    end
    doc.install resource('docs') if build.with? "docs"
  end

  def caveats
    if build.with? 'functions' then <<-EOS.undent
      Usage instructions for applications calling the sqlite3 API functions:

        In your application, call sqlite3_enable_load_extension(db,1) to
        allow loading external libraries.  Then load the library libsqlitefunctions
        using sqlite3_load_extension; the third argument should be 0.
        See http://www.sqlite.org/cvstrac/wiki?p=LoadableExtensions.
        Select statements may now use these functions, as in
        SELECT cos(radians(inclination)) FROM satsum WHERE satnum = 25544;

      Usage instructions for the sqlite3 program:

        If the program is built so that loading extensions is permitted,
        the following will work:
         sqlite> SELECT load_extension('#{lib}/libsqlitefunctions.dylib');
         sqlite> select cos(radians(45));
         0.707106781186548
      EOS
    end
  end

  test do
    path = testpath/"school.sql"
    path.write <<-EOS.undent
      create table students (name text, age integer);
      insert into students (name, age) values ('Bob', 14);
      insert into students (name, age) values ('Sue', 12);
      insert into students (name, age) values ('Tim', 13);
      select name from students order by age asc;
    EOS

    names = `#{bin}/sqlite3 < #{path}`.strip.split("\n")
    assert_equal %w[Sue Tim Bob], names
    assert_equal 0, $?.exitstatus
  end
end