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yadm - Yet Another Dotfiles Manager
yadm command [options] yadm git-command-or-alias [options] yadm init [-f] yadm clone url [-f] [-w directory] yadm config name [value] yadm config [-e] yadm list [-a] yadm encrypt yadm decrypt [-l] yadm alt yadm perms
yadm is a tool for managing a collection of files across multiple com- puters, using a shared Git repository. In addition, yadm provides a feature to select alternate versions of files based on the operation system or host name. Lastly, yadm supplies the ability to manage a subset of secure files, which are encrypted before they are included in the repository.
git-command or git-alias Any command not internally handled by yadm is passed through to git(1). Git commands or aliases are invoked with the yadm man- aged repository. The working directory for git commands will be the configured work-tree (usually $HOME). Dotfiles are managed by using standard git commands; add, com- mit, push, pull, etc. The config command is not passed directly through. Instead use the gitconfig command (see below). alt Create symbolic links for any managed files matching the naming rules describe in the ALTERNATES section. It is usually unnec- essary to run this command, as yadm automatically processes alternates by default. This automatic behavior can be disabled by setting the configuration yadm.auto-alt to "false". clone url Clone a remote repository for tracking dotfiles. After the con- tents of the remote repository have been fetched, a "merge" of origin/master is attempted. If there are conflicting files already present in the work-tree, this merge will fail and instead a "reset" of origin/master will be done. It is up to the user to resolve these conflicts, but if the desired action is to have the contents in the repository overwrite the existing files, then a "hard reset" should accomplish that: yadm reset --hard origin/master The repository is stored in $HOME/.yadm/repo.git. By default, $HOME will be used as the work-tree, but this can be overridden with the -w option. yadm can be forced to overwrite an existing repository by providing the -f option. config This command manages configurations for yadm. This command works exactly they way git-config(1) does. See the CONFIGURA- TION section for more details. decrypt Decrypt all files stored in $HOME/.yadm/files.gpg. Files decrypted will be relative to the configured work-tree (usually $HOME). Using the -l option will list the files stored without extracting them. encrypt Encrypt all files matching the patterns found in $HOME/.yadm/encrypt. See the ENCRYPTION section for more details. gitconfig Pass options to the git config command. Since yadm already uses the config command to manage its own configurations, this com- mand is provided as a way to change configurations of the repos- itory managed by yadm. One particularly useful case may be to configure the repository so untracked files are hidden from sta- tus commands: yadm gitconfig status.showUntrackedFiles no help Print a summary of yadm commands. init Initialize a new, empty repository for tracking dotfiles. The repository is stored in $HOME/.yadm/repo.git. By default, $HOME will be used as the work-tree, but this can be overridden with the -w option. yadm can be forced to overwrite an existing repository by providing the -f option. list Print a list of files managed by yadm. The -a option will cause all managed files to be listed. Otherwise, the list will only include files from the current directory or below. perms Update permissions as described in the PERMISSIONS section. It is usually unnecessary to run this command, as yadm automati- cally processes permissions by default. This automatic behavior can be disabled by setting the configuration yadm.auto-perms to "false". version Print the version of yadm.
yadm uses a configuration file named $HOME/.yadm/config. This file uses the same format as git-config(1). Also, you can control the con- tents of the configuration file via the yadm config command (which works exactly like git-config). For example, to disable alternates you can run the command: yadm config yadm.auto-alt false The following is the full list of supported configurations: yadm.auto-alt Disable the automatic linking described in the section ALTER- NATES. If disabled, you may still run yadm alt manually to cre- ate the alternate links. This feature is enabled by default. yadm.auto-perms Disable the automatic permission changes described in the sec- tion PERMISSIONS. If disabled, you may still run yadm perms manually to update permissions. This feature is enabled by default. yadm.ssh-perms Disable the permission changes to $HOME/.ssh/*. This feature is enabled by default.
When managing a set of files across different systems, it can be useful to have an automated way of choosing an alternate version of a file for a different operation system or simply for a different host. yadm implements a feature which will automatically create a symbolic link to the appropriate version of a file, as long as you follow a specific naming convention. yadm can detect files with names ending with: ##SYSTEM or ##SYSTEM.HOSTNAME If there are any files managed by yadm's repository which match this naming convention, symbolic links will be created for the most appro- priate version. This may best be demonstrated by example. Assume the following files are managed by yadm's repository: - $HOME/path/example.txt##Darwin - $HOME/path/example.txt##Darwin.host1 - $HOME/path/example.txt##Darwin.host2 - $HOME/path/example.txt##Linux - $HOME/path/example.txt##Linux.host1 - $HOME/path/example.txt##Linux.host2 If running on a Macbook named "host2", yadm will create a symbolic link which looks like this: $HOME/path/example.txt -> $HOME/path/example.txt##Darwin.host2 However, on another Mackbook named "host3", yadm will create a symbolic link which looks like this: $HOME/path/example.txt -> $HOME/path/example.txt##Darwin Since the hostname doesn't match any of the managed files, the more generic version is chosen. If running on a Linux server named "host4" the link will be: $HOME/path/example.txt -> $HOME/path/example.txt##Linux If running on a Solaris server, no link will be created because there are no files managed for that SYSTEM. SYSTEM is determined by running uname -s HOSTNAME by running host- name -s. yadm will automatically create these links by default. This can be disabled using the yadm.auto-alt configuration. Even if dis- abled, links can be manually created by running yadm alt.
It can be useful to manage confidential files, like SSH keys, across multiple systems. However, doing so would put plain text data into a Git repository, which often resides on a public system. yadm imple- ments a feature which can make it easy to encrypt and decrypt a set of files so the encrypted version can be maintained in the Git repository. This feature will only work if the gpg(1) command is available. To use this feature, a list of patterns must be created and saved as $HOME/.yadm/encrypt. This list of patterns should be relative to the configured work-tree (usually $HOME). For example: .ssh/*.key The yadm encrypt command will find all files matching the patterns, and prompt for a password. Once a password has confirmed, the matching files will be encrypted and saved as $HOME/.yadm/files.gpg. The pat- terns and files.gpg should be added to the yadm repository so they are available across multiple systems. To decrypt these files later, or on another system run yadm decrypt and provide the correct password. After files are decrypted, permissions are automatically updated as described in the PERMISSIONS section.
When files are checked out of a Git repository, their initial permis- sions are dependent upon the user's umask. This can result in confiden- tial files with lax permissions. To prevent this, yadm will automatically update the permissions of con- fidential files. The "group" and "others" permissions will be removed from the following files: - $HOME/.yadm/files.gpg - All files matching patterns in $HOME/.yadm/encrypt - The SSH directory and files, .ssh/* yadm will automatically update permissions by default. This can be dis- abled using the yadm.auto-perms configuration. Even if disabled, per- missions can be manually updated by running yadm perms. The SSH direc- tory processing can be disabled using the yadm.ssh-perms configuration.
$HOME/.yadm/config Configuration file for yadm. $HOME/.yadm/repo.git Git repository used by yadm. $HOME/.yadm/encrypt List of globs used for encrypt/decrypt $HOME/.yadm/files.gpg All files encrypted with yadm encrypt are stored in this file.
yadm init Create an empty repo for managing files yadm add .bash_profile ; yadm commit Add .bash_profile to the Git index and create a new commit yadm remote add origin <url> Add a remote origin to an existing repository yadm push -u origin master Initial push of master to origin echo .ssh/*.key >> $HOME/.yadm/encrypt Add a new pattern to the list of encrypted files yadm encrypt ; yadm add ~/.yadm/files.gpg ; yadm commit Commit a new set of encrypted files
Report issues or create pull requests at GitHub: https://github.com/TheLocehiliosan/yadm
Tim Byrne <email@example.com>
git(1), gpg(1) Other management tools which inspired the creation of yadm: homeshick <https://github.com/andsens/homeshick> vcsh <https://github.com/RichiH/vcsh>