A Dynamic Collection of Shell Scripts with Educational Purpose

Author: felipefacundes

utilities/completions/bash/complete_env_var.bash

@@ -0,0 +1,65 @@
+# Complete var without echo or print
+_complete_env_var_bind() {
+    local line="$READLINE_LINE"
+    local point="$READLINE_POINT"
+    local before="${line:0:$point}"
+    local _ENV_COLOR_HIGHLIGHT='\e[1;35m'
+    local _ENV_COLOR_RESET='\e[0m'
+    
+    # Extract the word before the cursor
+    local current_word="${before##*[^a-zA-Z0-9_]}"
+    local word_start=$(( point - ${#current_word} ))
+    local after="${line:$point}"
+    
+    # If it's a new word, rebuild
+    if [[ -z "$_ENV_ORIGINAL_WORD" ]] || [[ "$current_word" != "$_ENV_ORIGINAL_WORD"* && "$_ENV_ORIGINAL_WORD" != "$current_word"* ]]; then
+        _ENV_ORIGINAL_WORD="$current_word"
+        _ENV_MATCHES=()
+        _ENV_INDEX=-1
+        
+        # Search for matches
+        while IFS= read -r var; do
+            _ENV_MATCHES+=("$var")
+        done < <(compgen -v -- "$current_word")
+        
+        # Case-insensitive fallback
+        if [[ ${#_ENV_MATCHES[@]} -eq 0 && -n "$current_word" ]]; then
+            while IFS= read -r var; do
+                if [[ "${var,,}" == "${current_word,,}"* ]]; then
+                    _ENV_MATCHES+=("$var")
+                fi
+            done < <(compgen -v)
+        fi
+        
+        if [[ ${#_ENV_MATCHES[@]} -eq 0 ]]; then
+            _ENV_ORIGINAL_WORD=""
+            return 1
+        fi
+        
+        # Show options with colored highlighting
+        echo
+        local match
+        for match in "${_ENV_MATCHES[@]}"; do
+            # Separate the matching part from the rest
+            local prefix="${match:0:${#_ENV_ORIGINAL_WORD}}"
+            local suffix="${match:${#_ENV_ORIGINAL_WORD}}"
+            
+            # If case-insensitive, highlight the matching part
+            if [[ "${match,,}" == "${_ENV_ORIGINAL_WORD,,}"* ]]; then
+                # Get the actual prefix (preserving original case)
+                printf "${_ENV_COLOR_HIGHLIGHT}%s${_ENV_COLOR_RESET}%s  " "$prefix" "$suffix"
+            else
+                printf '%s  ' "$match"
+            fi
+        done
+        echo
+    fi
+    
+    # Advance to the next match (cycles through)
+    _ENV_INDEX=$(( (_ENV_INDEX + 1) % ${#_ENV_MATCHES[@]} ))
+    
+    # Apply the match
+    local selected="${_ENV_MATCHES[$_ENV_INDEX]}"
+    READLINE_LINE="${line:0:$word_start}${selected}${after}"
+    READLINE_POINT=$(( word_start + ${#selected} ))
+}

utilities/completions/bash/fix_bash_history.bash

@@ -0,0 +1,48 @@
+_remove_timestamp_in_single_line_format_from_bash_history() {
+    [[ ! -f "$HISTFILE" ]] && touch "$HISTFILE"
+    [[ -f "$HISTFILE" ]] && sed -i 's/^:[[:space:]][0-9]\{10\}:0;//g' "$HISTFILE" >/dev/null 2>&1
+    return 0
+}
+
+# https://www.baeldung.com/linux/history-remove-avoid-duplicates
+remove_duplicate_commands_from_bash_history() {
+    [[ ! -f "$HISTFILE" ]] && touch "$HISTFILE"
+    local history_file="${HISTFILE}"
+    local temp_file="${HISTFILE}.tmp"
+    [[ -f "${temp_file}" ]] && rm -f "${temp_file}"
+
+    # Filter duplicate commads
+    awk '!a[$0]++' "$history_file" > "$temp_file"
+
+    # Replace history
+    mv -f "$temp_file" "$history_file" >/dev/null 2>&1
+    return 0
+}
+
+_remove_unused_timestamps_from_bash_history() {
+    [[ ! -f "$HISTFILE" ]] && touch "$HISTFILE"
+    local history_file="${HISTFILE}"
+    local temp_file="${HISTFILE}.tmp"
+    [[ -f "${temp_file}" ]] && rm -f "${temp_file}"
+
+    # Filter history lines with timestamps and associated commands
+    awk '/^#[0-9]+$/ { if (getline c && c !~ /^#[0-9]+$/) { print $0 ORS c } } !/^#[0-9]+$/ { print }' "$history_file" > "$temp_file"
+
+    # Replace history
+    mv -f "$temp_file" "$history_file" >/dev/null 2>&1
+    return 0
+}
+
+_include_timestamp_in_bash_history() {
+    [[ ! -f "$HISTFILE" ]] && touch "$HISTFILE"
+    local history_file="${HISTFILE}"
+    local temp_file="${HISTFILE}.tmp"
+    [[ -f "${temp_file}" ]] && rm -f "${temp_file}"
+
+    # Filter history lines with timestamps and associated commands
+    awk '/^#[0-9]+$/ { if (getline c && c !~ /^#[0-9]+$/) { print $0 ORS c } } !/^#[0-9]+$/ { print strftime("#%s") ORS $0 }' "$history_file" > "$temp_file"
+
+    # Replace history
+    mv -f "$temp_file" "$history_file" >/dev/null 2>&1
+    return 0
+}