# Packaging

If you're packaging chezmoi for an operating system or distribution:

chezmoi has no build dependencies other than the standard Go toolchain.

chezmoi has no runtime dependencies, but is usually used with `git`, so many
packagers choose to make `git` an install dependency or recommended package.

Please set the version number, git commit, and build time in the binary. This
greatly assists debugging when end users report problems or ask for help. You
can do this by passing the following flags to `go build`:

```
-ldflags "-X main.version=$VERSION
          -X main.commit=$COMMIT
          -X main.date=$DATE
          -X main.builtBy=$BUILT_BY"
```

`$VERSION` should be the chezmoi version, e.g. `1.7.3`. Any `v` prefix is
optional and will be stripped, so you can pass the git tag in directly.

!!! hint

    The command `git describe --abbrev=0 --tags` will return a suitable value
    for `$VERSION`.

`$COMMIT` should be the full git commit hash at which chezmoi is built, e.g.
`4d678ce6850c9d81c7ab2fe0d8f20c1547688b91`.

!!! hint

    The `assets/scripts/generate-commit.go` script will return a suitable value
    for `$COMMIT`.
    You can run it with `go run assets/scripts/generate-commit.go`.

!!! hint

    The source archive contains a file called `COMMIT` containing the commit
    hash.

`$DATE` should be the date of the build as a UNIX timestamp or in RFC3339
format.

!!! hint

    The command `git show -s --format=%ct HEAD` returns the UNIX timestamp of
    the last commit, e.g. `1636668628`.

    The command `date -u +%Y-%m-%dT%H:%M:%SZ` returns the current time in
    RFC3339 format, e.g. `2019-11-23T18:29:25Z`.

`$BUILT_BY` should be a string indicating what system was used to build the
binary. Typically it should be the name of your packaging system, e.g.
`homebrew`.

Please enable cgo, if possible. chezmoi can be built and run without cgo, but
the `.chezmoi.username` and `.chezmoi.group` template variables may not be set
correctly on some systems.

chezmoi includes an `upgrade` command which attempts to self-upgrade. You can
remove this command completely by building chezmoi with the `noupgrade` build
tag.

chezmoi includes shell completions in the `completions` directory. Please
include these in the package and install them in the shell-appropriate
directory, if possible.

If the instructions for installing chezmoi in chezmoi's [install
guide](../install.md) are absent or incorrect, please open an issue or submit a
PR to correct them.
