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When ‘--help’ is given, just run ‘man’ to show the manual page

Browse source 
I.e. do what git does.  I'm too lazy to keep the builtin help text up
to date :-)

Also add ‘--help’ to various commands that lacked it
(e.g. nix-collect-garbage).
This commit is contained in:
Eelco Dolstra 2012-10-03 16:37:06 -04:00
parent 9c41c66c5b
commit a562d544d8
25 changed files with 51 additions and 329 deletions
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26
scripts/nix-build.in
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@ -33,36 +33,14 @@ for (my $n = 0; $n < scalar @ARGV; $n++) {
my $arg = $ARGV[$n];
if ($arg eq "--help") {
print STDERR <<EOF;
Usage: nix-build [OPTION]... [FILE]...
`nix-build' builds the given Nix expressions (which
default to ./default.nix if none are given). A symlink called
`result' is placed in the current directory.
Flags:
--add-drv-link: create a symlink `derivation' to the store derivation
--drv-link NAME: create symlink NAME instead of `derivation'
--no-out-link: do not create the `result' symlink
--out-link / -o NAME: create symlink NAME instead of `result'
--attr / -A ATTR: select a specific attribute from the Nix expression
--run-env: build dependencies of the specified derivation, then start a
shell with the environment of the derivation
--command: command to run with `--run-env'
--exclude: regexp specifying dependencies to be excluded by `--run-env'
Any additional flags are passed to `nix-store'.
EOF
exit 0;
# '` hack
exec "man nix-build" or die;
}
elsif ($arg eq "--version") {
print "nix-build (Nix) $Nix::Config::version\n";
exit 0;
}
elsif ($arg eq "--add-drv-link") {
$drvLink = "./derivation";
}