How to build an ABAP project with abapGit

<asx:abap xmlns:asx="http://www.sap.com/abapxml" version="1.0">
 <asx:values>
  <DATA>
   <NAME>abapGit</NAME>
   <MASTER_LANGUAGE>E</MASTER_LANGUAGE>
   <STARTING_FOLDER>/src/</STARTING_FOLDER>
   <FOLDER_LOGIC>PREFIX</FOLDER_LOGIC>
   <VERSION_CONSTANT>ZIF_ABAPGIT_VERSION=&gt;C_ABAP_VERSION</VERSION_CONSTANT>
  </DATA>
 </asx:values>
</asx:abap>

GET BADI { badi [FILTERS f1 = x1 f2 = x2 ...] }
       | { badi TYPE (name)
              [{FILTERS f1 = x1 f2 = x2 ...}
              |{FILTER-TABLE ftab}] }
              [CONTEXT con].

CALL BADI { badi->meth parameter_list }
        | { badi->(meth_name) {parameter_list
                              |parameter_tables} }.

managed implementation in class /dmo/bp_r_agencytp unique;
strict(2);
with draft;
extensible {
  with determinations on modify;
  with determinations on save;
  with validations on save;
  with additional save; }

extend behavior for EntityName
[implementation in class ClassName unique]
[with additional save [with full data]]
{
    ExtensionBody
  |[group]
}

METHODS constructor
  IMPORTING
    customizing_reader TYPE REF TO if_fra_cust_obj_model_reader.

METHOD constructor.
  me->customizing_reader = customizing_reader.
ENDMETHOD.

CLASS mytest DEFINITION FOR TESTING RISK LEVEL HARMLESS.
  PRIVATE SECTION.
    METHODS mytest FOR TESTING.
ENDCLASS.

CLASS mytest IMPLEMENTATION.
  METHOD mytest.
    myclass=>set_text_to_x( ).
    cl_abap_unit_assert=>assert_equals( act = myclass=>text
                                        exp = 'X' ).
  ENDMETHOD.
ENDCLASS.

method class_setup.
  " ABAP CDS Test Double Framework
  g_cds_environment = cl_cds_test_environment=>create( 'ZATI_CDS_ENTITY' ).
endmethod.

method setup.
  g_cds_environment->clear_doubles( ).
  m_cut = zati_cl_factory=>get_code_under_test( ).
endmethod.

{
  "global": { "files": "/src/**/*.*" },
  "syntax": {
    "version": { "release": "v793", "language": "Normal" },
    "errorNamespace": "^(Z|Y|LCL_|TY_|LIF_)"
  },
  "rules": {
    "check_syntax": true,
    "parser_error": true,
    "unknown_types": true
  }
}

on: [push, pull_request]
jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: abaplint
      uses: abaplint/actions-abaplint@main
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

AUTHORITY-CHECK OBJECT 'S_CARRID'
  ID 'CARRID' FIELD carr
  ID 'ACTVT' FIELD '03'.
IF sy-subrc <> 0.
  RETURN.
ENDIF.

... authorization master { ( global ) | ( instance ) | ( global, instance ) | ( none ) }
  | authorization dependent by _Assoc ...

" insecure if input is external and unchecked
DATA(sql_cond1) = `CARRID = '` && input && `'`.
SELECT SINGLE * FROM scarr WHERE (sql_cond1) INTO @wa.

" data object as operand
DATA(sql_cond2) = `CARRID = @input`.
SELECT SINGLE * FROM scarr WHERE (sql_cond2) INTO @wa.

" bad
CALL TRANSACTION 'FOO'.
" good
TRY.
    CALL TRANSACTION 'FOO' WITH AUTHORITY-CHECK.
  CATCH cx_sy_authorization_error.
ENDTRY.

DATA(lo_destination) = cl_http_destination_provider=>create_by_comm_arrangement(
  comm_scenario = 'ZMDC_OVERPASS_CSCEN'
  service_id    = 'ZMDC_OVERPASS_OBS_REST' ).
DATA(lo_http_client) = cl_web_http_client_manager=>create_by_http_destination(
  i_destination = lo_destination ).