KeyAmam · October 20, 2023 07:34 · Nov 30, 2019 · Nov 28, 2019 · Nov 28, 2019 · Nov 27, 2019
diff --git a/.bash_hooks b/.bash_hooks
@@ -16,9 +16,6 @@
 # define a function
 # add it into __hooks__after_each_command
 
-# ask for the admin password
-sudo -v
-
 filename="$(basename "$BASH_SOURCE")"
 
 # deactivate hooks to initialize (activate at the end)

diff --git a/.bash_hooks b/.bash_hooks
@@ -16,7 +16,8 @@
 # define a function
 # add it into __hooks__after_each_command
 
-
+# ask for the admin password
+sudo -v
 
 filename="$(basename "$BASH_SOURCE")"
 

diff --git a/.bash_hooks b/.bash_hooks
@@ -106,6 +106,7 @@ unset __hooks__register_function
 # initialize PREVPWD
 echo 'initializing $PREVPWD..'
 export PREVPWD="$PWD"
+unset filename
 # activate hooks
 echo 'activating hooks..'
 export __HOOKS__ACTIVATED=true

diff --git a/.bash_hooks b/.bash_hooks
@@ -42,11 +42,6 @@ function __hooks__before_each_command() {
     # before each command
     __hooks__set_git_clone_flag "${last_command[@]}";
 
-    if [ "$PREVPWD" != "$PWD" ]; then
-        # on changing directories
-        export PREVPWD="$PWD"
-    fi
-
     if [ -z "$__HOOKS__EXECUTING_LINE" ]; then
         return
     fi
@@ -75,6 +70,12 @@ function __hooks__after_each_command() {
     # after each command
     __hooks__prevent_duplicate_actions
     __hooks__unset_git_clone_flag
+
+    if [ "$PREVPWD" != "$PWD" ]; then
+        # after changing directories
+        # do something here
+        export PREVPWD="$PWD"
+    fi
 }
 ########## END OF SUBSEQUENT HOOK ##########
 

diff --git a/.bash_hooks b/.bash_hooks
@@ -33,11 +33,11 @@ function __hooks__set_git_clone_flag() {
 }
 
 function __hooks__before_each_command() {
+    local last_command=( $BASH_COMMAND )
+
     if [ -z "$__HOOKS__ACTIVATED" ]; then
         return
     fi
-
-    local last_command=( $BASH_COMMAND )
 
     # before each command
     __hooks__set_git_clone_flag "${last_command[@]}";

diff --git a/.bash_hooks b/.bash_hooks
@@ -96,12 +96,16 @@ function __hooks__register_function() {
 }
 
 # register the preceding hook
+echo 'registering the preceding hook..'
 trap '__hooks__before_each_command' DEBUG
 # register the subsequent hook
+echo 'registering the subsequent hook..'
 __hooks__register_function '__hooks__after_each_command'
 unset __hooks__register_function
 # initialize PREVPWD
+echo 'initializing $PREVPWD..'
 export PREVPWD="$PWD"
 # activate hooks
+echo 'activating hooks..'
 export __HOOKS__ACTIVATED=true
 ########## FINISH REGISTERING HOOKS ##########
diff --git a/.bash_hooks b/.bash_hooks
@@ -0,0 +1,107 @@
+#!/bin/bash
+
+# NOTES
+# To activate hooks, run:
+# . ./.bash_hooks
+
+# To clear hooks, run:
+# trap '' DEBUG
+# PROMPT_COMMAND=
+
+# To add a new action to the preceding hook
+# define a function
+# add it into __hooks__before_each_command
+
+# To add a new action to the subsequent hook
+# define a function
+# add it into __hooks__after_each_command
+
+
+
+filename="$(basename "$BASH_SOURCE")"
+
+# deactivate hooks to initialize (activate at the end)
+unset __HOOKS__ACTIVATED
+
+########## START OF PRECEDING HOOK ##########
+# define functions and add them into __hooks__before_each_command
+function __hooks__set_git_clone_flag() {
+    if [ 'git' = "$1" ] && [ 'clone' = "$2" ]; then
+        echo "Setting __HOOKS__ON_GIT_CLONE=true in $filename"
+        export __HOOKS__ON_GIT_CLONE=true
+    fi
+}
+
+function __hooks__before_each_command() {
+    if [ -z "$__HOOKS__ACTIVATED" ]; then
+        return
+    fi
+
+    local last_command=( $BASH_COMMAND )
+
+    # before each command
+    __hooks__set_git_clone_flag "${last_command[@]}";
+
+    if [ "$PREVPWD" != "$PWD" ]; then
+        # on changing directories
+        export PREVPWD="$PWD"
+    fi
+
+    if [ -z "$__HOOKS__EXECUTING_LINE" ]; then
+        return
+    fi
+
+    unset __HOOKS__EXECUTING_LINE
+    # before each first command of a comamnd line
+}
+########## END OF PRECEDING HOOK ##########
+
+
+
+########## START OF SUBSEQUENT HOOK ##########
+# define functions and add them into __hooks__after_each_command
+function __hooks__prevent_duplicate_actions() {
+    export __HOOKS__EXECUTING_LINE=true
+}
+
+function __hooks__unset_git_clone_flag() {
+    unset __HOOKS__ON_GIT_CLONE
+}
+
+function __hooks__after_each_command() {
+    if [ -z "$__HOOKS__ACTIVATED" ]; then
+        return
+    fi
+    # after each command
+    __hooks__prevent_duplicate_actions
+    __hooks__unset_git_clone_flag
+}
+########## END OF SUBSEQUENT HOOK ##########
+
+
+
+########## START REGISTERING HOOKS ##
+function __hooks__register_function() {
+    local f="$1"; shift
+    local regex="^ *$f *$"
+    # filter the given function name out of PROMPT_COMMAND to avoid invalid format and duplicate execution
+    # awk splits PROMPT_COMMAND by ";", extract elements that UNMATCH to the given regex and join with ";"
+    # avoided using ORS to skip appending ";" to the last record
+    PROMPT_COMMAND="$(
+        echo "$PROMPT_COMMAND" |
+        awk -v regex="$regex" 'BEGIN { RS=";" } length($1) > 0 && $1 !~ regex { printf "%s%s", delim, $1; delim=";" }'
+    )"
+    # append the function name
+    export PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND;}$f"
+}
+
+# register the preceding hook
+trap '__hooks__before_each_command' DEBUG
+# register the subsequent hook
+__hooks__register_function '__hooks__after_each_command'
+unset __hooks__register_function
+# initialize PREVPWD
+export PREVPWD="$PWD"
+# activate hooks
+export __HOOKS__ACTIVATED=true
+########## FINISH REGISTERING HOOKS ##########
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