Auto discovery of executables

ci/run_tests.bat

@@ -44,6 +44,41 @@ if errorlevel 1 exit 1
 if errorlevel 1 exit 1
 
 
+cd ..\hello_complex_2
+if errorlevel 1 exit 1
+
+..\..\..\fpm\build\gfortran_debug\app\fpm build
+if errorlevel 1 exit 1
+
+.\build\gfortran_debug\app\say_hello_world
+if errorlevel 1 exit 1
+
+.\build\gfortran_debug\app\say_goodbye
+if errorlevel 1 exit 1
+
+.\build\gfortran_debug\test\greet_test
+if errorlevel 1 exit 1
+
+.\build\gfortran_debug\test\farewell_test
+
+
+cd ..\auto_discovery_off
+if errorlevel 1 exit 1
+
+..\..\..\fpm\build\gfortran_debug\app\fpm build
+if errorlevel 1 exit 1
+
+.\build\gfortran_debug\app\auto_discovery_off
+if errorlevel 1 exit 1
+
+.\build\gfortran_debug\test\my_test
+if errorlevel 1 exit 1
+
+if exist .\build\gfortran_debug\app\unused exit /B 1
+
+if exist .\build\gfortran_debug\test\unused_test exit /B 1
+
+
 cd ..\with_c
 if errorlevel 1 exit 1
 

ci/run_tests.sh

@@ -19,6 +19,20 @@ cd ../hello_complex
 ./build/gfortran_debug/test/greet_test
 ./build/gfortran_debug/test/farewell_test
 
+cd ../hello_complex_2
+../../../fpm/build/gfortran_debug/app/fpm build
+./build/gfortran_debug/app/say_hello_world
+./build/gfortran_debug/app/say_goodbye
+./build/gfortran_debug/test/greet_test
+./build/gfortran_debug/test/farewell_test
+
+cd ../auto_discovery_off
+../../../fpm/build/gfortran_debug/app/fpm build
+./build/gfortran_debug/app/auto_discovery_off
+./build/gfortran_debug/test/my_test
+test ! -x ./build/gfortran_debug/app/unused
+test ! -x ./build/gfortran_debug/test/unused_test
+
 cd ../with_c
 ../../../fpm/build/gfortran_debug/app/fpm build
 ./build/gfortran_debug/app/with_c
@@ -28,4 +42,4 @@ cd ../submodules
 
 cd ../program_with_module
 ../../../fpm/build/gfortran_debug/app/fpm build
-./build/gfortran_debug/app/Program_with_module
+./build/gfortran_debug/app/Program_with_module

fpm/src/fpm.f90

@@ -5,8 +5,11 @@ module fpm
 use fpm_command_line, only: fpm_build_settings, fpm_new_settings, &
                       fpm_run_settings, fpm_install_settings, fpm_test_settings
 use fpm_environment, only: run, get_os_type, OS_LINUX, OS_MACOS, OS_WINDOWS
-use fpm_filesystem, only: join_path, number_of_rows, list_files, exists, basename
-use fpm_model, only: srcfile_ptr, srcfile_t, fpm_model_t
+use fpm_filesystem, only: is_dir, join_path, number_of_rows, list_files, exists, basename
+use fpm_model, only: srcfile_ptr, srcfile_t, fpm_model_t, &
+                    FPM_SCOPE_UNKNOWN, FPM_SCOPE_LIB, &
+                    FPM_SCOPE_DEP, FPM_SCOPE_APP, FPM_SCOPE_TEST
+
 use fpm_sources, only: add_executable_sources, add_sources_from_dir, &
                        resolve_module_dependencies
 use fpm_manifest, only : get_package_data, default_executable, &
@@ -54,20 +57,38 @@ subroutine build_model(model, settings, package, error)
     model%link_flags = ''
 
     ! Add sources from executable directories
-    if (allocated(package%executable)) then
+    if (is_dir('app') .and. package%build_config%auto_executables) then
+        call add_sources_from_dir(model%sources,'app', FPM_SCOPE_APP, &
+                                   with_executables=.true., error=error)
+
+        if (allocated(error)) then
+            return
+        end if
 
-        call add_executable_sources(model%sources, package%executable, &
-                                     is_test=.false., error=error)
+    end if
+    if (is_dir('test') .and. package%build_config%auto_tests) then
+        call add_sources_from_dir(model%sources,'test', FPM_SCOPE_TEST, &
+                                   with_executables=.true., error=error)
 
         if (allocated(error)) then
             return
         end if
 
     end if
-    if (allocated(package%test)) then
+    if (allocated(package%executable)) then
+        call add_executable_sources(model%sources, package%executable, FPM_SCOPE_APP, &
+                                     auto_discover=package%build_config%auto_executables, &
+                                     error=error)
+
+        if (allocated(error)) then
+            return
+        end if
 
-        call add_executable_sources(model%sources, package%test, &
-                                     is_test=.true., error=error)
+    end if
+    if (allocated(package%test)) then
+        call add_executable_sources(model%sources, package%test, FPM_SCOPE_TEST, &
+                                     auto_discover=package%build_config%auto_tests, &
+                                     error=error)
 
         if (allocated(error)) then
             return
@@ -76,17 +97,16 @@ subroutine build_model(model, settings, package, error)
     end if
 
     if (allocated(package%library)) then
-
-        call add_sources_from_dir(model%sources,package%library%source_dir, &
-                                      error=error)
+        call add_sources_from_dir(model%sources, package%library%source_dir, &
+                                    FPM_SCOPE_LIB, error=error)
 
         if (allocated(error)) then
             return
         end if
 
     end if
 
-    call resolve_module_dependencies(model%sources)
+    call resolve_module_dependencies(model%sources,error)
 
 end subroutine build_model
 
@@ -107,8 +127,9 @@ subroutine cmd_build(settings)
     call default_library(package%library)
 end if
 
-! Populate executable in case we find the default app directory
-if (.not.allocated(package%executable) .and. exists("app")) then
+! Populate executable in case we find the default app
+if (.not.allocated(package%executable) .and. &
+     exists(join_path('app',"main.f90"))) then
     allocate(package%executable(1))
     call default_executable(package%executable(1), package%name)
 end if

fpm/src/fpm/manifest.f90

@@ -7,6 +7,7 @@
 !  Additionally, the required data types for users of this module are reexported
 !  to hide the actual implementation details.
 module fpm_manifest
+    use fpm_manifest_build_config, only: build_config_t
     use fpm_manifest_executable, only : executable_t
     use fpm_manifest_library, only : library_t
     use fpm_manifest_package, only : package_t, new_package

fpm/src/fpm/manifest/build_config.f90

@@ -0,0 +1,140 @@
+!> Implementation of the build configuration data.
+!
+!  A build table can currently have the following fields
+!
+!  ```toml
+!  [build]
+!  auto-executables = <bool>
+!  auto-tests = <bool>
+!  ```
+module fpm_manifest_build_config
+    use fpm_error, only : error_t, syntax_error, fatal_error
+    use fpm_toml, only : toml_table, toml_key, toml_stat, get_value
+    implicit none
+    private
+
+    public :: build_config_t, new_build_config
+
+
+    !> Configuration data for build
+    type :: build_config_t
+
+        !> Automatic discovery of executables
+        logical :: auto_executables
+
+        !> Automatic discovery of tests
+        logical :: auto_tests
+
+    contains
+
+        !> Print information on this instance
+        procedure :: info
+
+    end type build_config_t
+
+
+contains
+
+
+    !> Construct a new build configuration from a TOML data structure
+    subroutine new_build_config(self, table, error)
+
+        !> Instance of the build configuration
+        type(build_config_t), intent(out) :: self
+
+        !> Instance of the TOML data structure
+        type(toml_table), intent(inout) :: table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        !> Status 
+        integer :: stat
+
+        call check(table, error)
+        if (allocated(error)) return
+
+        call get_value(table, "auto-executables", self%auto_executables, .true., stat=stat)
+
+        if (stat /= toml_stat%success) then
+            call fatal_error(error,"Error while reading value for 'auto-executables' in fpm.toml, expecting logical")
+            return
+        end if
+
+        call get_value(table, "auto-tests", self%auto_tests, .true., stat=stat)
+
+        if (stat /= toml_stat%success) then
+            call fatal_error(error,"Error while reading value for 'auto-tests' in fpm.toml, expecting logical")
+            return
+        end if
+
+    end subroutine new_build_config
+
+
+    !> Check local schema for allowed entries
+    subroutine check(table, error)
+
+        !> Instance of the TOML data structure
+        type(toml_table), intent(inout) :: table
+
+        !> Error handling
+        type(error_t), allocatable, intent(out) :: error
+
+        type(toml_key), allocatable :: list(:)
+        integer :: ikey
+
+        call table%get_keys(list)
+
+        ! table can be empty
+        if (size(list) < 1) return
+
+        do ikey = 1, size(list)
+            select case(list(ikey)%key)
+
+            case("auto-executables", "auto-tests")
+                continue
+
+            case default
+                call syntax_error(error, "Key "//list(ikey)%key//" is not allowed in [build]")
+                exit
+
+            end select
+        end do
+
+    end subroutine check
+
+
+    !> Write information on build configuration instance
+    subroutine info(self, unit, verbosity)
+
+        !> Instance of the build configuration
+        class(build_config_t), intent(in) :: self
+
+        !> Unit for IO
+        integer, intent(in) :: unit
+
+        !> Verbosity of the printout
+        integer, intent(in), optional :: verbosity
+
+        integer :: pr
+        character(len=*), parameter :: fmt = '("#", 1x, a, t30, a)'
+
+        if (present(verbosity)) then
+            pr = verbosity
+        else
+            pr = 1
+        end if
+
+        if (pr < 1) return
+
+        write(unit, fmt) "Build configuration"
+        ! if (allocated(self%auto_executables)) then
+            write(unit, fmt) " - auto-discovery (apps) ", merge("enabled ", "disabled", self%auto_executables)
+        ! end if
+        ! if (allocated(self%auto_tests)) then
+            write(unit, fmt) " - auto-discovery (tests) ", merge("enabled ", "disabled", self%auto_tests)
+        ! end if
+
+    end subroutine info
+
+end module fpm_manifest_build_config

fpm/src/fpm/manifest/package.f90

@@ -28,6 +28,7 @@
 !  [[test]]
 !  ```
 module fpm_manifest_package
+    use fpm_manifest_build_config, only: build_config_t, new_build_config
     use fpm_manifest_dependency, only : dependency_t, new_dependencies
     use fpm_manifest_executable, only : executable_t, new_executable
     use fpm_manifest_library, only : library_t, new_library
@@ -48,6 +49,9 @@ module fpm_manifest_package
         !> Name of the package
         character(len=:), allocatable :: name
 
+        !> Build configuration data
+        type(build_config_t) :: build_config
+
         !> Package version
         type(version_t) :: version
 
@@ -103,8 +107,18 @@ subroutine new_package(self, table, error)
            return
         end if
 
+        call get_value(table, "build", child, requested=.true., stat=stat)
+        if (stat /= toml_stat%success) then
+            call fatal_error(error, "Type mismatch for build entry, must be a table")
+            return
+        end if
+        call new_build_config(self%build_config, child, error)
+
+        if (allocated(error)) return
+
         call get_value(table, "version", version, "0")
         call new_version(self%version, version, error)
+
         if (allocated(error)) return
 
         call get_value(table, "dependencies", child, requested=.false.)
@@ -193,7 +207,7 @@ subroutine check(table, error)
                 name_present = .true.
 
             case("version", "license", "author", "maintainer", "copyright", &
-                    & "description", "keywords", "categories", "homepage", &
+                    & "description", "keywords", "categories", "homepage", "build", &
                     & "dependencies", "dev-dependencies", "test", "executable", &
                     & "library")
                 continue
@@ -238,6 +252,8 @@ subroutine info(self, unit, verbosity)
             write(unit, fmt) "- name", self%name
         end if
 
+        call self%build_config%info(unit, pr - 1)
+
         if (allocated(self%library)) then
             write(unit, fmt) "- target", "archive"
             call self%library%info(unit, pr - 1)

fpm/src/fpm_backend.f90

@@ -6,7 +6,9 @@ module fpm_backend
 use fpm_filesystem, only: basename, join_path, exists, mkdir
 use fpm_model, only: fpm_model_t, srcfile_t, FPM_UNIT_MODULE, &
                      FPM_UNIT_SUBMODULE, FPM_UNIT_SUBPROGRAM, &
-                     FPM_UNIT_CSOURCE, FPM_UNIT_PROGRAM
+                     FPM_UNIT_CSOURCE, FPM_UNIT_PROGRAM, &
+                     FPM_SCOPE_TEST
+
 use fpm_strings, only: split
 
 implicit none
@@ -59,7 +61,7 @@ subroutine build_package(model)
 
             base = basename(model%sources(i)%file_name,suffix=.false.)
 
-            if (model%sources(i)%is_test) then
+            if (model%sources(i)%unit_scope == FPM_SCOPE_TEST) then
                 subdir = 'test'
             else
                 subdir = 'app'