How to create nonexistent subdirectories recursively using Bash?

问题

I am creating a quick backup script that will dump some databases into a nice/neat directory structure and I realized that I need to test to make sure that the directories exist before I create them. The code I have works, but it seems that there is a better way to do it. Any suggestions?

[ -d \"$BACKUP_DIR\" ] || mkdir \"$BACKUP_DIR\"
[ -d \"$BACKUP_DIR/$client\" ] || mkdir \"$BACKUP_DIR/$client\"
[ -d \"$BACKUP_DIR/$client/$year\" ] || mkdir \"$BACKUP_DIR/$client/$year\"
[ -d \"$BACKUP_DIR/$client/$year/$month\" ] || mkdir \"$BACKUP_DIR/$client/$year/$month\"
[ -d \"$BACKUP_DIR/$client/$year/$month/$day\" ] || mkdir \"$BACKUP_DIR/$client/$year/$month/$day\"

回答1:

You can use the -p parameter, which is documented as:

-p, --parents

no error if existing, make parent directories as needed

So:

mkdir -p "$BACKUP_DIR/$client/$year/$month/$day"

回答2:

$ mkdir -p "$BACKUP_DIR/$client/$year/$month/$day"

回答3:

While existing answers definitely solve the purpose, if your'e looking to replicate nested directory structure under two different subdirectories, then you can do this

mkdir -p {main,test}/{resources,scala/com/company}

It will create following directory structure under the directory from where it is invoked

├── main
│   ├── resources
│   └── scala
│       └── com
│           └── company
└── test
    ├── resources
    └── scala
        └── com
            └── company

The example was taken from this link for creating SBT directory structure

回答4:

mkdir -p newDir/subdir{1..8}
ls newDir/
subdir1 subdir2 subdir3 subdir4 subdir5 subdir6 subdir7 subdir8

来源：https://stackoverflow.com/questions/1731767/how-to-create-nonexistent-subdirectories-recursively-using-bash

标签

bash

shell

recursion

subdirectory