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lix/src/nix-env/help.txt

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* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
2003-12-01 15:55:05 +00:00
nix-env [OPTIONS...] [ARGUMENTS...]
`nix-env' is a tool to manipulate Nix user environments.
Operations:
* Implemented Eelco V.'s `nix-env -I' command to specify the default path of the Nix expression to be used with the import, upgrade, and query commands. For instance, $ nix-env -I ~/nixpkgs/pkgs/system/i686-linux.nix $ nix-env --query --available [aka -qa] sylpheed-0.9.7 bison-1.875 pango-1.2.5 subversion-0.35.1 ... $ nix-env -i sylpheed $ nix-env -u subversion There can be only one default at a time. * If the path to a Nix expression is a symlink, follow the symlink prior to resolving relative path references in the expression.
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--install / -i: add derivations to the user environment
--upgrade / -u: upgrade derivation in the user environment
* Version numbers can be omitted in install/uninstall. E.g., nix-env -i foo.nix subversion The version number part of a derivation name is defined as everything following the first dash not followed by a letter.
2003-12-21 23:58:56 +00:00
--uninstall / -e: remove derivations from the user environment
* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
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--query / -q: perform a query on an environment or Nix expression
The previous operations take a list of derivation names. The special
name `*' may be used to indicate all derivations.
* Improvements to profiles. Generations are now per-profile, e.g., default -> default-94-link default-82-link -> /nix/store/cc4480... default-83-link -> /nix/store/caeec8... ... default-94-link -> /nix/store/2896ca... experimental -> experimental-2-link experimental-1-link -> /nix/store/cc4480... experimental-2-link -> /nix/store/a3148f... * `--profile' / `-p' -> `--switch-profile' / `-S' * `--link' / `-l' -> `--profile' / `-p' * The default profile is stored in $prefix/var/nix/profiles. $prefix/var/nix/links is gone. Profiles can be stored anywhere. * The current profile is now referenced from ~/.nix-profile, not ~/.nix-userenv. * The roots to the garbage collector now have extension `.gcroot', not `.id'.
2004-02-06 10:30:20 +00:00
--switch-profile / -S [FILE]: switch to specified profile
* A command `--switch-generation' to switch to a specific generation of the current profile, e.g., $ nix-env --list-generations ... 39 2004-02-02 17:53:53 40 2004-02-02 17:55:18 41 2004-02-02 17:55:41 42 2004-02-02 17:55:50 (current) $ nix-env --switch-generation 39 $ ls -l /nix/var/nix/profiles/default ... default -> default-39-link * Also a command `--rollback' which is just a convenience operation to rollback to the oldest generation younger than the current one. Note that generations properly form a tree. E.g., if after switching to generation 39, we perform an installation action, a generation 43 is created which is a descendant of 39, not 42. So a rollback from 43 ought to go back to 39. This is not currently implemented; generations form a linear sequence.
2004-02-08 14:07:43 +00:00
--switch-generation / -G NUMBER: switch to specified generation of profile
--rollback: switch to the previous generation
--list-generations: list available generations of a profile
* Document --delete-generations and other nix-env options.
2004-11-12 23:56:37 +00:00
--delete-generations GENERATIONS...: deleted listed generations,
`old' for all non-current generations
* A command `--switch-generation' to switch to a specific generation of the current profile, e.g., $ nix-env --list-generations ... 39 2004-02-02 17:53:53 40 2004-02-02 17:55:18 41 2004-02-02 17:55:41 42 2004-02-02 17:55:50 (current) $ nix-env --switch-generation 39 $ ls -l /nix/var/nix/profiles/default ... default -> default-39-link * Also a command `--rollback' which is just a convenience operation to rollback to the oldest generation younger than the current one. Note that generations properly form a tree. E.g., if after switching to generation 39, we perform an installation action, a generation 43 is created which is a descendant of 39, not 42. So a rollback from 43 ought to go back to 39. This is not currently implemented; generations form a linear sequence.
2004-02-08 14:07:43 +00:00
* Implemented Eelco V.'s `nix-env -I' command to specify the default path of the Nix expression to be used with the import, upgrade, and query commands. For instance, $ nix-env -I ~/nixpkgs/pkgs/system/i686-linux.nix $ nix-env --query --available [aka -qa] sylpheed-0.9.7 bison-1.875 pango-1.2.5 subversion-0.35.1 ... $ nix-env -i sylpheed $ nix-env -u subversion There can be only one default at a time. * If the path to a Nix expression is a symlink, follow the symlink prior to resolving relative path references in the expression.
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--import / -I FILE: set default Nix expression
* Implemented Eelco V.'s `-p' command to switch profiles. It switches the symlink ~/.nix-userenv to the given argument (which defaults to .../links/current). /etc/profile.d/nix-profile creates this symlink if it doesn't exist yet. Example use: $ nix-env -l my_profile -i foo.nix subversion quake $ nix-env -p my_profile I don't like the term "profile". Let's deprecate it :-)
2004-01-05 11:18:59 +00:00
* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
2003-12-01 15:55:05 +00:00
--version: output version information
--help: display help
* In `--upgrade': added flags `--lt', `--leq', `--always' to specify whether we want to upgrade if the current version is less than the available version (default), when it is less or equal, or always. * Added a flag `--dry-run' to show what would happen in `--install', `--uninstall', and `--upgrade', without actually performing the operation.
2004-02-09 11:59:39 +00:00
Install / upgrade / uninstall flags:
--dry-run: show what would be done, but don't do it
Upgrade flags:
--lt: upgrade unless the current version is older (default)
--leq: upgrade unless the current version is older or current
--always: upgrade regardless of current version
* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
2003-12-01 15:55:05 +00:00
Query types:
--name: print derivation names (default)
* Refactoring to support different installation sources in nix-env. * Set the references for the user environment manifest properly. * Don't copy the manifest (this was accidental). * Don't store derivation paths in the manifest (maybe this should be made optional). This cleans up the semantics of nix-env, which were weird. * Hash on the output paths of activated components, not on derivation paths. This is because we don't know the derivation path of already installed components anymore, and it allows the installation of components by store path (skipping Nix expressions entirely). * Query options `--out-path' and `--drv-path' to show the output and derivation paths of components, respectively (the latter replaces the `--expr' query).
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--drv-path: print path of derivation
--out-path: print path of derivation output
* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
2003-12-01 15:55:05 +00:00
--status / -s: print installed/present status
Query sources:
--installed: use installed derivations (default)
* Implemented Eelco V.'s `nix-env -I' command to specify the default path of the Nix expression to be used with the import, upgrade, and query commands. For instance, $ nix-env -I ~/nixpkgs/pkgs/system/i686-linux.nix $ nix-env --query --available [aka -qa] sylpheed-0.9.7 bison-1.875 pango-1.2.5 subversion-0.35.1 ... $ nix-env -i sylpheed $ nix-env -u subversion There can be only one default at a time. * If the path to a Nix expression is a symlink, follow the symlink prior to resolving relative path references in the expression.
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--available / -a: use derivations available in Nix expression
* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
2003-12-01 15:55:05 +00:00
Options:
* Improvements to profiles. Generations are now per-profile, e.g., default -> default-94-link default-82-link -> /nix/store/cc4480... default-83-link -> /nix/store/caeec8... ... default-94-link -> /nix/store/2896ca... experimental -> experimental-2-link experimental-1-link -> /nix/store/cc4480... experimental-2-link -> /nix/store/a3148f... * `--profile' / `-p' -> `--switch-profile' / `-S' * `--link' / `-l' -> `--profile' / `-p' * The default profile is stored in $prefix/var/nix/profiles. $prefix/var/nix/links is gone. Profiles can be stored anywhere. * The current profile is now referenced from ~/.nix-profile, not ~/.nix-userenv. * The roots to the garbage collector now have extension `.gcroot', not `.id'.
2004-02-06 10:30:20 +00:00
--profile / -p LINK: use specified profile instead of target of ~/.nix-profile
* Implemented Eelco V.'s `nix-env -I' command to specify the default path of the Nix expression to be used with the import, upgrade, and query commands. For instance, $ nix-env -I ~/nixpkgs/pkgs/system/i686-linux.nix $ nix-env --query --available [aka -qa] sylpheed-0.9.7 bison-1.875 pango-1.2.5 subversion-0.35.1 ... $ nix-env -i sylpheed $ nix-env -u subversion There can be only one default at a time. * If the path to a Nix expression is a symlink, follow the symlink prior to resolving relative path references in the expression.
2004-01-05 16:26:43 +00:00
--file / -f FILE: use Nix expression FILE for installation, etc.
* Help text for all (non-script) programs, so no more: $ nix-instantiate --help error: unknown flag `--help` Try `nix-instantiate --help' for more information. :-)
2003-12-01 15:55:05 +00:00
--verbose / -v: verbose operation (may be repeated)
--keep-failed / -K: keep temporary directories of failed builds
* Document --delete-generations and other nix-env options.
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--preserve-installed: do not replace currently installed versions in `-i'
--system-filter SYSTEM: only use derivations for specified platform
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