replace.sh: replace a given text with another in all matching files.

replace.sh

#!/usr/bin/env bash

# Check if at least three arguments are provided
if [ "$#" -lt 3 ]; then
    echo "Replace a given text with another in all matching files."
    echo
    echo "Usage: replace.sh <glob> <find_text> <replace_text> [--dry-run]"
    echo
    echo 'E.g.: replace.sh ".env*" "API_URL=http:\/\/localhost:80\n" "API_URL=http:\/\/localhost:8080\nAPI_VERSION=v2"'
    exit 1
fi

# Assign arguments to variables
GLOB=$1
FIND_TEXT=$2
REPLACE_TEXT=$3
DRY_RUN=false

# Check for the optional --dry-run argument
if [ "$#" -eq 4 ] && [ "$4" == "--dry-run" ]; then
    DRY_RUN=true
fi

# Use the glob to find matching files
FILES=$(eval "ls $GLOB" 2>/dev/null)

# Check if any files matched the glob
if [ -z "$FILES" ]; then
    echo "No files found matching the glob: $GLOB"
    exit 1
fi

# Iterate over each file
for FILE in $FILES; do
    if [ -f "$FILE" ]; then
        if $DRY_RUN; then
            # Dry-run: Show what would be replaced
            echo "Dry-run: will replace \"$FIND_TEXT\" with \"$REPLACE_TEXT\" in $FILE"
        else
            # Actual replacement
            sed -zi "s/$FIND_TEXT/$REPLACE_TEXT/g" "$FILE"
            echo "Updated $FILE"
        fi
    else
        echo "Skipping $FILE (not a regular file)"
    fi
done