udpdate: add error trace for RUN_bash_script

Author: jen-soft2

pydocker.py

@@ -72,6 +72,9 @@ class DockerFile(pydocker.DockerFile):
     v1.0.4      Fri May  3 14:18:31 UTC 2019     jen
             - fix regex validation of img name
 
+    v1.0.5      Sat Jun 15 11:21:02 UTC 2019     jen
+            - add error trace for RUN_bash_script
+
 
 --------------------------------------------------------------------------------
 contributors:
@@ -182,7 +185,20 @@ def COPY(self, dst_path, content, chmod=None):
         self.add_new_file(dst_path, content, chmod=chmod)
 
     def RUN_bash_script(self, dst_path, content, keep_file=False):
-        content = '#!/usr/bin/env bash\nset -o xtrace\n' + content
+        # https://stackoverflow.com/questions/22009364/is-there-a-try-catch-command-in-bash
+        # https://unix.stackexchange.com/questions/462156/how-do-i-find-the-line-number-in-bash-when-an-error-occured
+        content = '''
+#!/usr/bin/env bash
+set -e -o xtrace
+
+function _failure() {
+  echo -e "\\r\\nERROR: bash script [ %(script_name)s ] failed at line $1: \\"$2\\""
+}
+trap '_failure ${LINENO} "$BASH_COMMAND"' ERR
+
+# ############################################################################ #
+        '''.strip() % {'script_name': dst_path} + '\n\n'+ content
+
         self.COPY(dst_path, content, chmod='+x')
         self.RUN = dst_path
         if not keep_file:

setup.py

@@ -33,7 +33,7 @@
 # https://test.pypi.org/project/pydocker
 # pip install --no-cache-dir -U -i https://test.pypi.org/pypi pydocker
 
-# git tag -a v1.0.4 -m 'version 1.0.4'
+# git tag -a v1.0.5 -m 'version 1.0.5'
 
 # ------------------------------------------------------------------------------
 rm -rf ./dist
@@ -42,7 +42,7 @@
 python3.4 setup.py sdist             # EGG
 python3.4 -m twine upload dist/* -r pypi
 
-# pip install --no-cache-dir -U pydocker==1.0.4
+# pip install --no-cache-dir -U pydocker==1.0.5
 # ls -lah /usr/local/lib/python2.7/dist-packages | grep pydocker
 
 # ------------------------------------------------------------------------------
@@ -58,7 +58,7 @@
 
 setup(
     name='pydocker',
-    version='1.0.4',
+    version='1.0.5',
 
     description='Easy generator Dockerfile for humans.',
     long_description=long_description,
@@ -73,7 +73,7 @@
     maintainer_email='[email protected]',
 
     platforms=['any', ],
-    download_url='https://github.com/jen-soft/pydocker/archive/v1.0.4.zip',
+    download_url='https://github.com/jen-soft/pydocker/archive/v1.0.5.zip',
 
     # packages=['pydocker', ],
     py_modules=['pydocker', ],