From d078fc78b8bf2ac39a262f60da2915e964f9d391 Mon Sep 17 00:00:00 2001
From: Brandon Rodriguez <brodriguez8774@gmail.com>
Date: Tue, 30 Apr 2019 12:05:05 -0400
Subject: [PATCH] Create helper bash script

---
 helper_script.sh | 99 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 helper_script.sh

diff --git a/helper_script.sh b/helper_script.sh
new file mode 100644
index 0000000..fdcaaad
--- /dev/null
+++ b/helper_script.sh
@@ -0,0 +1,99 @@
+
+###
+ # Modified "cd" command to automatically load/unload Python ".venv" environments.
+ # :$1: The standard path to pass into the "cd" command.
+ ##
+function cd() {
+
+  # Check if .venv folder exists in path to final location.
+  local cd_string=$1
+  local cd_path=""
+  local checked_current=false
+
+
+  # Check all sections of provided path.
+  for index in $(echo $cd_string | tr "/" "\n")
+  do
+
+    # Check if we've looked at any paths yet.
+    if [[ "$cd_path" ]]
+    then
+      # Not first part of path. Simply concat index and prev path info.
+      cd_path="$cd_path/$index"
+    else
+      # First part of path. Check current folder, before anything else.
+      cd_path="$index"
+
+      # Deactivate if backing out and .venv folder exists in current folder.
+      if [[ "$index" == ".." ]]
+      then
+        if [[ -d .venv ]]
+        then
+          cd_venv_deactivate
+        fi
+      fi
+    fi
+
+
+    # Check if current path equals home folder. If so, assume fresh start and deactivate.
+    if [[ "/$cd_path" == "$HOME" ]]
+    then
+      cd_venv_deactivate
+    fi
+
+
+    # If backing up, check for .venv in parent folder.
+    if [[ "$index" == ".." ]]
+    then
+      # Check for venv folder.
+      if [[ -d "$cd_path/.venv" ]]
+      then
+        cd_venv_deactivate
+      fi
+    else
+      # Otherwise, check if we're going into a new .venv.
+      if [[ -d "$cd_path/.venv" ]]
+      then
+        cd_venv_activate "./$cd_path/.venv"
+      fi
+    fi
+
+  done
+
+
+  # Execute normal cd command.
+  builtin cd $1
+
+
+  # Check for .venv folder in new directory.
+  if [[ -d ./.venv ]]
+  then
+    cd_venv_activate "./.venv"
+  fi
+}
+
+
+###
+ # Attempts to activate Python virtual environment.
+ # :$1: Path of folder for virtual environment (excluding the "/bin/activate" part).
+ ##
+cd_venv_activate() {
+
+  # First make sure no other environment is loaded.
+  cd_venv_deactivate
+
+  # Load environment.
+  . "$1/bin/activate"
+}
+
+
+###
+ # Deactivates current Python virtual environment, if present.
+ ##
+cd_venv_deactivate() {
+  # Check if environment is currently active.
+  if [[ -n "$VIRTUAL_ENV" ]]
+  then
+    deactivate
+  fi
+}
-- 
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