如何分批执行/home目录下各子文件夹中foo文件的source命令

Hey there! Let's fix that batch sourcing issue for you. Your original script has a small syntax error (you meant source "$file" instead of source */foo), but the bigger goal is splitting the 80 files into batches of 20. Here are a couple of straightforward ways to do this:

Method 1: Using Bash Arrays (Clean & Flexible) #

This approach stores all target files in an array first, then processes them in chunks using array slicing. It's easy to adjust the batch size and adds error checking to skip missing files.

# Store all /home/*/foo files in an array
files=(/home/*/foo)
# Set your desired batch size
batch_size=20

# Loop through the array in batches
for ((index=0; index<${#files[@]}; index+=batch_size)); do
    # Extract the current batch of files
    current_batch=("${files[@]:index:batch_size}")
    
    echo "=== Starting batch $((index/batch_size + 1)): Processing ${#current_batch[@]} files ==="
    
    # Source each file in the batch
    for file in "${current_batch[@]}"; do
        if [[ -f "$file" ]]; then
            source "$file"
            echo "Successfully sourced: $file"
        else
            echo "Warning: $file does not exist, skipping"
        fi
    done
    
    # Optional: Pause between batches to verify progress
    if (( index + batch_size < ${#files[@]} )); then
        read -p "Press Enter to proceed to the next batch..."
    fi
done

echo "✅ All ${#files[@]} files processed!"

Why this works: #

• ${#files[@]} gives the total number of files in the array
• ${files[@]:index:batch_size} slices the array to get batch_size elements starting at index
• The optional pause lets you confirm each batch completes before moving on (remove the read line if you want fully automatic processing)

Method 2: Using a Counter (Simple & Iterative) #

If you prefer a more linear approach without arrays, use a counter to track how many files you've processed and pause every 20:

count=0
batch_size=20

for file in /home/*/foo; do
    if [[ -f "$file" ]]; then
        source "$file"
        echo "Sourced: $file"
        ((count++))
        
        # Pause after every full batch (except the last one)
        if (( count % batch_size == 0 )) && (( count < 80 )); then
            read -p "Processed $count files. Press Enter to continue..."
        fi
    else
        echo "Skipping missing file: $file"
    fi
done

echo "✅ Done! Processed $count total files."

Key Notes: #

• Important: When you run this script, make sure to execute it in your current shell session using source ./your_script.sh or . ./your_script.sh—if you run it with bash ./your_script.sh, the variables/settings from the sourced foo files won't persist in your main shell.
• Always add a check for file existence ([[ -f "$file" ]]) to avoid errors if any /home/*/foo path doesn't exist.

内容的提问来源于stack exchange，提问作者machinecat