Use getcwd() instead of PWD env var

Author: fpjentzsch

src/finn/transformation/fpgadataflow/create_stitched_ip.py

@@ -627,7 +627,7 @@ def apply(self, model):
             f.write(tcl_string)
         # create a shell script and call Vivado
         make_project_sh = vivado_stitch_proj_dir + "/make_project.sh"
-        working_dir = os.environ["PWD"]
+        working_dir = os.getcwd()
         with open(make_project_sh, "w") as f:
             f.write("#!/bin/bash \n")
             f.write("cd {}\n".format(vivado_stitch_proj_dir))

src/finn/transformation/fpgadataflow/make_zynq_proj.py

@@ -395,7 +395,7 @@ def apply(self, model):
 
         # create a TCL recipe for the project
         synth_project_sh = vivado_pynq_proj_dir + "/synth_project.sh"
-        working_dir = os.environ["PWD"]
+        working_dir = os.getcwd()
         with open(synth_project_sh, "w") as f:
             f.write("#!/bin/bash \n")
             f.write("cd {}\n".format(vivado_pynq_proj_dir))

src/finn/transformation/fpgadataflow/vitis_build.py

@@ -135,7 +135,7 @@ def apply(self, model):
 
         # create a shell script and call Vivado
         package_xo_sh = vivado_proj_dir + "/gen_xo.sh"
-        working_dir = os.environ["PWD"]
+        working_dir = os.getcwd()
         with open(package_xo_sh, "w") as f:
             f.write("#!/bin/bash \n")
             f.write("cd {}\n".format(vivado_proj_dir))
@@ -307,7 +307,7 @@ def apply(self, model):
 
         # create a shell script and call Vitis
         script = link_dir + "/run_vitis_link.sh"
-        working_dir = os.environ["PWD"]
+        working_dir = os.getcwd()
         with open(script, "w") as f:
             f.write("#!/bin/bash \n")
             f.write("cd {}\n".format(link_dir))
@@ -340,7 +340,7 @@ def apply(self, model):
 
         # run Vivado to gen xml report
         gen_rep_xml_sh = link_dir + "/gen_report_xml.sh"
-        working_dir = os.environ["PWD"]
+        working_dir = os.getcwd()
         with open(gen_rep_xml_sh, "w") as f:
             f.write("#!/bin/bash \n")
             f.write("cd {}\n".format(link_dir))

src/finn/util/hls.py

@@ -54,7 +54,7 @@ def build(self, code_gen_dir):
         assert which("vitis_hls") is not None, "vitis_hls not found in PATH"
         self.code_gen_dir = code_gen_dir
         self.ipgen_script = str(self.code_gen_dir) + "/ipgen.sh"
-        working_dir = os.environ["PWD"]
+        working_dir = os.getcwd()
         f = open(self.ipgen_script, "w")
         f.write("#!/bin/bash \n")
         f.write("cd {}\n".format(code_gen_dir))