Traverse file structure from top and rename the immediate parent

Discussion in 'Programming/Scripts' started by sahil_jammu, May 25, 2011.

  1. sahil_jammu

    sahil_jammu New Member

    Hello All,

    I am trying to write a script to:-

    1. Traverse entire file system, look for directories which has .git directory in it
    2. Rename the immediate parent directory to <orignal_name.git>
    3. Traverse new file structure and look for all directories with <original_name>.git
    4. cd to that directory and remove its contents
    5. once everything inside the directory is deleted, create a file

    Step 1:- find * -type d -iname '.git'
    Step 2:-
    function rename_git_parent
    for file in "$1"/*
    cd .. | $(pwd) -exec mv '{}' '{}'.dir ';'
    return 1

    //i am not too sure if its the right way of doing it, or shall i use dirname..

    How shall i go about step2 and ownwards...
  2. sahil_jammu

    sahil_jammu New Member

    Got the solution:-
    This will find all directories named .git, and make sure their parent directories have names ending with .git:
    find / -depth -type d -name .git -printf '%h\0' | while read -d "" old ; do
    [ ! -d "$old" ] && continue
    [ "$old" == "$new" ] && continue

    if [ -e "$new" ]; then
    echo "$new: Already exists" >&2
    mv -vi "$old" "$new"
    The -depth flag will tell find to descend first, so that all child directories are checked before a parent directory. The -printf '%h\0' option will output the parent directory name and a NUL separator (zero byte; the only thing you cannot have in pathnames). If using Bash, the -d "" option to the read builtin will read such NUL-separated pathnames; other shells won't support that.

    (If you are not using Bash, use -printf "%h\n" | while read dir ; do instead. It'll bork if you have directories with a newline in their names, though.)

    The first continue test checks if this directory has already been renamed something else. (I think it is impossible for that to happen, but it doesn't hurt to check.)
    The second continue test checks if the directory already has an acceptable name.

    If the new directory name is still available, the directory is renamed.

    This will find empty all directories that have names ending in .git (but not just .git), and create file "file" in it:
    find / -depth -type d -name '?*.git' -printf '%p\0' | while read -d "" dir ; do
    find "$dir/" -depth -mindepth 1 -delete
    touch "$dir/file"
    The glob pattern ?*.git matches (anything not empty).git .

    The inner find deletes everything in the directory, but not the directory itself (since minimum depth is 1). Although rm usually feels like the choice for this, it'd either delete the directory itself too, skip any files or subdirectories having a dot in the name, or throw an error about nonexistent files, depending on what you supply to it. If you delete and then recreate the directory, you'll lose any extended attributes. So, surprisingly, find is better for this.

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