80 lines
3.1 KiB
Markdown
80 lines
3.1 KiB
Markdown
Compare Directories and Remove Duplicates
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This Bash script compares subdirectories in two locations, groups them based on fuzzy name similarity, and automatically removes duplicates. It supports both undesirable-word–based removal and an automatic pruning mechanism (keeping the first directory in each group).
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Features
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Normalization & Cleaning:
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Converts directory names to lowercase, removes punctuation, and strips out any undesirable words specified in a words file.
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Fuzzy Matching:
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Uses Python's difflib to compute a similarity ratio between cleaned directory names. A configurable threshold determines if two names are “similar.”
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Automatic Removal:
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Undesirable Words: Automatically removes directories whose original name contains one of the undesirable words if another similar directory does not.
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Duplicate Pruning: After the initial pass, automatically removes all duplicates in a group while keeping the first entry.
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Dry-Run Mode:
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Preview actions without deleting any directories by using the --dry-run flag.
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Requirements
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Bash (version 4+ recommended)
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Python 3
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bc for floating point comparisons
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Installation
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Clone the repository:
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git clone https://github.com/yourusername/compare-dirs.git
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cd compare-dirs
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Make the script executable:
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bash
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Kopiér
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chmod +x compare_dirs.sh
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Usage
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./compare_dirs.sh [--dry-run] [--threshold <threshold>] <dir1> <dir2> <words_file>
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Arguments
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<dir1>: The first directory containing subdirectories to compare.
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<dir2>: The second directory containing subdirectories to compare.
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<words_file>: A text file with one undesirable word per line. These words are removed from directory names during the cleaning process.
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Options
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--dry-run
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Print the actions without actually removing any directories.
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--threshold <threshold>
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Set the fuzzy similarity threshold (default is 0.8). A lower threshold (e.g., 0.7) will group more directories as duplicates.
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Examples
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Dry Run with Default Threshold (0.8):
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./compare_dirs.sh --dry-run /mnt/dsnas /mnt/dsnas1 ./words
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Dry Run with a Custom Threshold (0.7):
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./compare_dirs.sh --dry-run --threshold 0.7 /mnt/dsnas /mnt/dsnas1 ./words
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Actual Run (without dry-run):
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./compare_dirs.sh /mnt/dsnas /mnt/dsnas1 ./words
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How It Works
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Scanning:
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The script scans for immediate subdirectories in the two specified directories.
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Normalization & Cleaning:
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Each subdirectory name is normalized (converted to lowercase, punctuation removed) and then “cleaned” by stripping out undesirable words (one per line from the words file).
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Grouping:
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Using a Python helper with difflib.SequenceMatcher, directories are grouped by comparing their cleaned names. If the similarity ratio meets or exceeds the threshold, they are considered duplicates.
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Removal:
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Automatic Removal Based on Undesirable Words:
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Within duplicate groups, if one directory’s original name contains an undesirable word while an alternative does not, that directory is flagged for removal.
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Duplicate Pruning:
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After the undesirable-word check, any remaining duplicate groups are pruned by keeping the first directory in each group and removing the rest.
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Dry-Run:
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When run with the --dry-run flag, the script will print what it would remove without actually deleting any directories.
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