Support for dependency path relative to the fpm.toml it’s written in (#719)

Author: zoziha

README.md

@@ -66,7 +66,8 @@ or from [miniconda](https://docs.conda.io/en/latest/miniconda.html).
 
 #### [MSYS2]
 
-Fpm is available as MinGW package in the MSYS2 package manager.
+Fpm is available as MinGW package in the MSYS2 package manager,
+which supports parallelization of the target compilation.
 To install fpm with pacman use
 
 ```

ci/run_tests.sh

@@ -118,6 +118,10 @@ pushd c_main
 "$fpm" run
 popd
 
+pushd hello_fpm_path
+"$fpm" run
+popd
+
 pushd preprocess_cpp
 "$fpm" build
 popd

example_packages/hello_fpm_path/app/main.f90

@@ -0,0 +1,10 @@
+program hello_fpm
+    use utils1_m, only: say_hello1
+    use utils1_1_m, only: say_hello1_1
+    use utils2_m, only: say_hello2
+
+    call say_hello1()
+    call say_hello1_1()
+    call say_hello2()
+
+end program hello_fpm

example_packages/hello_fpm_path/crate/utils1/fpm.toml

@@ -0,0 +1,4 @@
+name = "utils1"
+
+[dependencies]
+utils1_1 = { path = "../utils1_1" }

example_packages/hello_fpm_path/crate/utils1/src/say_hello.f90

@@ -0,0 +1,11 @@
+module utils1_m
+
+    implicit none
+    
+contains
+    
+    subroutine say_hello1()
+        print '(a)', "Hello, utils1."
+    end subroutine say_hello1
+
+end module utils1_m

example_packages/hello_fpm_path/crate/utils1_1/fpm.toml

@@ -0,0 +1 @@
+name = "utils1_1"

example_packages/hello_fpm_path/crate/utils1_1/src/say_hello.f90

@@ -0,0 +1,11 @@
+module utils1_1_m
+
+    implicit none
+    
+contains
+    
+    subroutine say_hello1_1()
+        print '(a)', "Hello, utils1_1."
+    end subroutine say_hello1_1
+
+end module utils1_1_m

example_packages/hello_fpm_path/crate/utils2/fpm.toml

@@ -0,0 +1 @@
+name = "utils2"

example_packages/hello_fpm_path/crate/utils2/src/say_hello.f90

@@ -0,0 +1,11 @@
+module utils2_m
+
+    implicit none
+    
+contains
+    
+    subroutine say_hello2()
+        print '(a)', "Hello, utils2."
+    end subroutine say_hello2
+
+end module utils2_m

example_packages/hello_fpm_path/fpm.toml

@@ -0,0 +1,5 @@
+name = "hello_fpm_path"
+
+[dependencies]
+utils1 = { path = "crate/utils1" }
+utils2 = { path = "crate/utils2" }