Install composer

It's handy to have Composer as package manager out of the box with PHP.

Signed-off-by: Alexandre Eher <alexandre@eher.com.br>

bin/install

@@ -38,6 +38,15 @@ install_php() {
     )
 }
 
+install_composer() {
+    local bin_path=$1/bin
+
+    $bin_path/php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+    $bin_path/php -r "if (hash_file('sha384', 'composer-setup.php') === 'a5c698ffe4b8e849a443b120cd5ba38043260d5c4023dbf93e1558871f1f07f58274fc6f4c93bcfd858c6bd0775cd8d1') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
+    $bin_path/php composer-setup.php --install-dir=$bin_path --filename=composer
+    $bin_path/php -r "unlink('composer-setup.php');"
+}
+
 construct_configure_options() {
   local install_path=$1
 
@@ -227,3 +236,4 @@ get_php_version() {
 }
 
 install_php $ASDF_INSTALL_TYPE $ASDF_INSTALL_VERSION $ASDF_INSTALL_PATH
+install_composer $ASDF_INSTALL_PATH