.\" -*- mode: troff; coding: utf-8 -*-
.TH "nix3-store-optimise" "1" ""
.RS
.PP
\fBWarning\fR 
.br
This program is
\fB\fBexperimental\fR\fR
and its interface is subject to change.
.RE
.SH
Name
.LP
\fCnix store optimise\fR - replace identical files in the store by hard links
.SH
Synopsis
.LP
\fCnix store optimise\fR [\fIoption\fR\[u2026]] 
.SH
Examples
.IP "\(bu" 3
Optimise the Nix store:
.LP
.EX
nix store optimise
.EE
.SH
Description
.LP
This command deduplicates the Nix store: it scans the store for
regular files with identical contents, and replaces them with hard
links to a single instance.
.PP
Note that you can also set \fCauto-optimise-store\fR to \fCtrue\fR in
\fCnix.conf\fR to perform this optimisation incrementally whenever a new
path is added to the Nix store. To make this efficient, Nix maintains
a content-addressed index of all the files in the Nix store in the
directory \fC/nix/store/.links/\fR.
.SH
Options
.SS
Logging-related options
.IP "\(bu" 3
\fB\fC--debug\fR\fR
.IP
Set the logging verbosity level to \(oqdebug\(cq.
.IP "\(bu" 3
\fB\fC--log-format\fR\fR \fIformat\fR
.IP
Set the format of log output; one of \fCraw\fR, \fCinternal-json\fR, \fCbar\fR or \fCbar-with-logs\fR.
.IP "\(bu" 3
\fB\fC--print-build-logs\fR\fR / \fC-L\fR
.IP
Print full build logs on standard error.
.IP "\(bu" 3
\fB\fC--quiet\fR\fR
.IP
Decrease the logging verbosity level.
.IP "\(bu" 3
\fB\fC--verbose\fR\fR / \fC-v\fR
.IP
Increase the logging verbosity level.
.SS
Miscellaneous global options
.IP "\(bu" 3
\fB\fC--help\fR\fR
.IP
Show usage information.
.IP "\(bu" 3
\fB\fC--offline\fR\fR
.IP
Disable substituters and consider all previously downloaded files up-to-date.
.IP "\(bu" 3
\fB\fC--option\fR\fR \fIname\fR \fIvalue\fR
.IP
Set the Nix configuration setting \fIname\fR to \fIvalue\fR (overriding \fCnix.conf\fR).
.IP "\(bu" 3
\fB\fC--refresh\fR\fR
.IP
Consider all previously downloaded files out-of-date.
.IP "\(bu" 3
\fB\fC--version\fR\fR
.IP
Show version information.
.RS
.LP
\fBNote\fR
.PP
See \fB\fCman nix.conf\fR\fR for overriding configuration settings with command line flags.
.RE