git-scripts

Scripts to automate my working patterns with Git repositories

git-pull-ff -- this script pulls any updates from configured remotes, and attempts a fast-forward merge of the current workspace with its counterparts.
git-sync -- this script first pushes any updates from local repository to remote repos (except upstream), then does a git pull-ff to receive any missing updates from the remotes.
git-merge-um -- this script pulls updates from remote repos and tries to merge the remote upstream/master (configurable) int the current workspace branch, and optionally tries to rebase the workspace over the upstream/master state.
git-zclone -- uses ZFS to clone a dataset which contains a Git repository, then rewrites some metadata in the new clone (reference to origin, NetBeans project metadata, etc.) In effect this should yield similar results to local filesystem-based git clone, except that with ZFS cloning, anything present in the workspace dataset is cloned (such as old build products) unless you add --wipe -f to the command-line. You can also automatically link to the chosen upstream repo during initial cloning of your origin, following the github-fork-clone model to get a workspace. I use this a lot lately, so the typical command-line for such activity is, for reference, simply this:

:; git zclone https://github.com/user/repo.git "" -U https://github.com/project/repo.git

git-branchkill -- helps clean up local workspaces (that share an upstream) from proliferation of development branches, especially as those are getting merged into a common upstream and are no longer needed separately.
git-meld -- wraps usage of a difference-viewing program such as meld (can be customized by setting DIFFVIEWER envvar in e.g. user profile) as the one-time renderer for git diff requests. May be irrelevant as there is a git mergetool wrapper (as I found later), but this one is still shorter ;)
git-branch-alias -- a recent addition, and not mine to start with (kudos go to Phil Sainty), this Git extension allows to reference branches by another name. Think of all tools and habits that expect a master branch and hiccup on an oi/hipster ;) I took Phil's script from his StackOverflow post and just added links to his posts and a bash shebang.
git-dig-history -- this allows to search and even rewrite the git repo history, looking for a specified PATTERN. Use-cases include replacement of sensitive data (e.g. avoid password leaking when a project gets opensourced) and looking for commits related to a keyword you are trying to track down.

As with any other Git methods, it suffices that these scripts are available in your PATH (e.g. in $USER/bin, or symlinked to /usr/bin, etc.) and then they can be called as git method-name, such as git zclone ws1 /tmp/buildws.

git retimestamp -- a PoC script to change timestamps of the most-recent BACK commits in your branch, rewinding each by OFFSET (e.g. -3 days).
git reauthor -- a PoC script to change authorship of the most-recent BACK commits in your branch, changing to $COMMIT_USER_NAME <$COMMIT_USER_EMAIL> and optionally filtering to only change commits originally owned by matches to regex $COMMIT_USER_FILTER. Intended to fix up code initially developed and tested "in vivo" on final deployments without proper git setup attributing changes to certain persons. With a SIGNOFF=true can also be used to add (or replace in case of filter) a Signed-off-by: User Name <email@domain> to the commit message (for stating the DCO compliance).

Other related automation scripts

The _Jenkinsfile-check.sh is an odd addition to the bunch: it is not (yet) a git method. This script allows to validate a Jenkinsfile that can automate your CI pipelines (instructions stored and tracked as code, rather than results of GUI clicks). It has an option however to "bump" the successfully passed file by committing it into the git repository, so (after a push) it will be used to drive actual builds and tests. This requires Jenkins REST API to to the actual tests, and the credentials to access the CI application server instance can be stored in a config file.
The register-git-cache.sh script also is not (yet?) a git method. This script is here to allow managing a git repository in the directory it resides in as a sort of cache, usable as a reference git repo for faster clones e.g. in a CI environment.

NOTE: Development of this script has been separated into https://github.com/jimklimov/git-refrepo-scripts to better align with related evolution of Jenkins Git Client plugin proposed in jenkinsci/git-client-plugin#644
- Thanks to bits of wisdom at https://stackoverflow.com/a/57133963/4715872 and https://pcarleton.com/2016/11/10/ssh-proxy/ I now know that if we have overloaded our firewall banging SSH repos at github.com:22 we can also fetch over make-believe HTTPS port including over a proxy like Squid with ProxyCommand line un-commented below):

### ~/.ssh/config
Host github.com
    Hostname ssh.github.com
    #ProxyCommand nc -X connect -x <PROXY-HOST>:<PROXY-PORT> %h %p
    Port 443
    ServerAliveInterval 20
    User git
    IdentitiesOnly yes
    IdentityFile   ~/.ssh/id_rsa_jenkins

The ccache-cleanlock.sh is not a git-related script. However it finds use in the build farms I maintain so got hosted here :) As the name implies, this one helps automate the ccache lock files, which sometimes can get abandoned by an interrupted build or due to systemic issues, and slow down subsequent builds.

Hope this helps, Jim Klimov

License

jimklimov/git-scripts

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