Per project shell history

gistfile1.txt

# Per-project history
function _set_project_history() {
    local project_id=""
    
    # Check if we're in a git repository
    if git rev-parse --git-dir > /dev/null 2>&1; then
        # Try to get the remote URL (origin by default)
        local remote_url=$(git config --get remote.origin.url 2>/dev/null)
        
        if [ -n "$remote_url" ]; then
            # Sanitize the remote URL to create a valid filename
            # Removes protocol, converts slashes and special chars to underscores
            project_id=$(echo "$remote_url" | sed -e 's|^.*://||' -e 's|^.*@||' -e 's|:|_|g' -e 's|/|_|g' -e 's|\.git$||')
        else
            # Fallback: use the repository's .git folder's inode or unique ID
            # This works for local repos without remotes
            local git_dir=$(git rev-parse --absolute-git-dir 2>/dev/null)
            if [ -n "$git_dir" ]; then
                # Use a hash of the git directory path for uniqueness
                project_id=$(echo "$git_dir" | md5sum | cut -d' ' -f1)
            fi
        fi
    fi
    
    # Set history file based on project ID
    if [ -n "$project_id" ]; then
        mkdir -p "$HOME/.shell_histories"
        export HISTFILE="$HOME/.shell_histories/${project_id}_history"
    else
        # Use default global history when not in a git repo
        if [ -n "$ZSH_VERSION" ]; then
            export HISTFILE="$HOME/.zsh_history"
        else
            export HISTFILE="$HOME/.bash_history"
        fi
    fi
}

# Hook into directory changes
if [ -n "$ZSH_VERSION" ]; then
    # Zsh hook
    autoload -U add-zsh-hook
    add-zsh-hook chpwd _set_project_history
else
    # Bash hook
    PROMPT_COMMAND="_set_project_history; $PROMPT_COMMAND"
fi

# Set history on shell startup
_set_project_history