Add existing scripts

common.v4.sh

@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+# Exit if any command fails
+set -e
+
+# Inform the user of the output they can expect.
+
+echo "common commands:"
+
+write_command_then_count() {
+    # Get the command and count, which currently looks like:
+    #   '42 git commit'
+    # Then write th e command with the count afterward
+    local line="$1"
+    local count=$(echo "${line}" | cut -d' ' -f1)
+    local command=$(echo "${line}" | cut -d' ' -f2-)
+    echo "${command} (${count})"
+}
+
+
+# The following variables control how the command runs.
+shell_binary=""             # A place to store the shell binary value
+history_file=""             # A place to store the history file path
+history_lines=1000          # The number of lines of history to search through
+command_count=${1:-10}      # The number of common commands to show
+
+# Check whether you can determine the name of the shell binary
+shell_regex="([^/]+$)"
+if [[ $SHELL =~ $shell_regex ]]; then
+    # Depending on the name of the shell binary, set the history filepath
+    shell_binary=${BASH_REMATCH[1]}
+    if [[ $shell_binary == "bash" ]]; then
+        history_file=~/.bash_history
+    elif [[ $shell_binary == "zsh" ]]; then
+        history_file=~/.zsh_history
+    fi
+fi
+
+# If you are searching through the bash history, you can look at the history file
+# to get the most common commands
+if [[ $shell_binary == "bash" ]]; then
+    
+    # Show the most commonly used commands
+    commands=$(tail "${history_file}" -n ${history_lines} \
+        | sort \
+        | uniq -c \
+        | sed 's/^ *//' \
+        | sort -n -r \
+        | head -n ${command_count})
+
+elif [[ $shell_binary == "zsh" ]]; then
+
+    # Z shell shitory lines look like this:
+    # : 1621135004:0;uname -a
+    # Run the same command as above, and extract everything _after_ the
+    # semicolon, which is the command text
+    commands=$(tail "${history_file}" -n ${history_lines} \
+        | cut -d';' -f2 \
+        | sort \
+        | uniq -c \
+        | sed 's/^ *//' \
+        | sort -n -r \
+        | head -n ${command_count})
+else
+
+    # show a warning to the user that you don't know where the history file
+    # is for their shell
+    echo "Sorry, I don't know where to find the history file for '${SHELL}'"
+fi
+
+# Print each command, showing its order in the list
+# Commands are separated by newlines, so temporarily change IFS to loop over
+# each line of the commands
+counter=1
+old_ifs=$IFS
+IFS=$'\n'
+for command in $commands
+do
+    use_count=$(echo "$command" | cut -d' ' -f 1)
+    use_command=$(echo "$command" | cut -d' ' -f 2)
+    printf "$(tput bold; tput setaf 3)%-5s $(tput sgr0)$(tput setaf 6)%-5s $(tput sgr0)%-5s\n" "$counter" "$use_count" "$use_command"
+    counter=$((counter + 1))
+done
+IFS=$old_ifs
+