dune-subst - Substitute watermarks in source files.

       Check bug reports at https://github.com/ocaml/dune/issues

       These options are common to all commands.

       --debug-backtraces
           Always print exception backtraces.

       --help[=FMT] (default=auto)
           Show  this  help  in format FMT. The value FMT must be one of auto, pager, groff or plain. With auto,
           the format is pager or plain whenever the TERM env var is dumb or undefined.

       --version
           Show version information.

       Substitute %%ID%% strings in source files, in a similar fashion to what topkg does in the default
       configuration.

       This command is only meant to be called when a user pins a package to its development version. Especially
       it replaces %%VERSION%% strings by the version obtained from the vcs. Currently only git is supported and
       the version is obtained from the output of:

         $ git describe --always --dirty --abbrev=7

       dunesubst substitutes the variables that topkg substitutes with the default configuration:
       - %%NAME%%, the name of the project (from the dune-project file)
       - %%VERSION%%, output of gitdescribe--always--dirty--abbrev=7
       - %%VERSION_NUM%%, same as %%VERSION%% but with a potential leading 'v' or 'V' dropped
       - %%VCS_COMMIT_ID%%, commit hash from the vcs
       - %%PKG_MAINTAINER%%, contents of the maintainer: field from the opam file
       - %%PKG_AUTHORS%%, contents of the authors: field from the opam file
       - %%PKG_HOMEPAGE%%, contents of the homepage: field from the opam file
       - %%PKG_ISSUES%%, contents of the issues: field from the opam file
       - %%PKG_DOC%%, contents of the doc: field from the opam file
       - %%PKG_LICENSE%%, contents of the license: field from the opam file
       - %%PKG_REPO%%, contents of the repo: field from the opam file

       In order to call dunesubst when your package is pinned, add this line to the build: field of your opam
       file:

         [dune "subst"] {pinned}

       Note that this command is meant to be called only from opam files and behaves a bit differently from
       other dune commands. In particular it doesn't try to detect the root and must be called from the root of
       the project.

dunesubst exits with:

       0   on success.

       1   if an error happened.

       130 if it was interrupted by a signal.

       Use `duneCOMMAND --help' for help on a single command.

       dune-subst - Substitute watermarks in source files.

--build-info
           Show build information.

dune(1)

Dune 3.17.2                                                                                        DUNE-SUBST(1)

dunesubst [--build-info] [OPTION]…