commands: harmonize in-barebox documentation

This patch does probably too much, but it's hard (and very
cumbersome/time consuming) to break it out. What is does is this:

* each command has one short description, e.g. "list MUX configuration"
* made sure the short descriptions start lowercase
* each command has one usage. That string contains just the
  options, e.g. "[-npn]". It's not part of the long help text.
* that is, it doesn't say "[OPTIONS]" anymore, every usable option
  is listed by character in this (short) option string (the long
  description is in the long help text, as before)
* help texts have been reworked, to make them
  - sometimes smaller
  - sometimes describe the options better
  - more often present themselves in a nicer format
* all long help texts are now created with BUSYBOX_CMD_HELP_
  macros, no more 'static const __maybe_unused char cmd_foobar_help[]'
* made sure the long help texts starts uppercase
* because cmdtp->name and cmdtp->opts together provide the new usage,
  all "Usage: foobar" texts have been removed from the long help texts
* BUSYBOX_CMD_HELP_TEXT() provides the trailing newline by itself, this
  is nicer in the source code
* BUSYBOX_CMD_HELP_OPT() provides the trailing newline by itself
* made sure no line gets longer than 77 characters
* delibertely renamed cmdtp->usage, so that we can get compile-time
  errors (e.g. in out-of-tree modules that use register_command()
* the 'help' command can now always emit the usage, even without
  compiled long help texts
* 'help -v' gives a list of commands with their short description, this
  is similar like the old "help" command before my patchset
* 'help -a' gives out help of all commands

Signed-off-by: Holger Schurig <holgerschurig@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 12 insertions, 12 deletions

diff --git a/commands/digest.c b/commands/digest.c
index 998074048e..092fda21af 100644
--- a/commands/digest.c
+++ b/commands/digest.c
@@ -83,13 +83,13 @@ static int do_md5(int argc, char *argv[])
 }
 
 BAREBOX_CMD_HELP_START(md5sum)
-BAREBOX_CMD_HELP_USAGE("md5sum [[FILE] [AREA]]...\n")
-BAREBOX_CMD_HELP_SHORT("Calculate a md5 checksum of a memory area.\n")
+BAREBOX_CMD_HELP_TEXT("Calculate a MD5 digest over a FILE or a memory area.")
 BAREBOX_CMD_HELP_END
 
 BAREBOX_CMD_START(md5sum)
 	.cmd		= do_md5,
-	.usage		= "md5 checksum calculation",
+	BAREBOX_CMD_DESC("calculate MD5 checksum")
+	BAREBOX_CMD_OPTS("FILE|AREA...")
 	BAREBOX_CMD_GROUP(CMD_GRP_FILE)
 	BAREBOX_CMD_HELP(cmd_md5sum_help)
 BAREBOX_CMD_END
@@ -104,13 +104,13 @@ static int do_sha1(int argc, char *argv[])
 }
 
 BAREBOX_CMD_HELP_START(sha1sum)
-BAREBOX_CMD_HELP_USAGE("sha1sum [[FILE] [AREA]]...\n")
-BAREBOX_CMD_HELP_SHORT("Calculate a sha1 checksum of a memory area.\n")
+BAREBOX_CMD_HELP_TEXT("Calculate a SHA1 digest over a FILE or a memory area.")
 BAREBOX_CMD_HELP_END
 
 BAREBOX_CMD_START(sha1sum)
 	.cmd		= do_sha1,
-	.usage		= "sha1 checksum calculation",
+	BAREBOX_CMD_DESC("calculate SHA1 digest")
+	BAREBOX_CMD_OPTS("FILE|AREA")
 	BAREBOX_CMD_GROUP(CMD_GRP_FILE)
 	BAREBOX_CMD_HELP(cmd_sha1sum_help)
 BAREBOX_CMD_END
@@ -125,13 +125,13 @@ static int do_sha224(int argc, char *argv[])
 }
 
 BAREBOX_CMD_HELP_START(sha224sum)
-BAREBOX_CMD_HELP_USAGE("sha224sum [[FILE] [AREA]]...\n")
-BAREBOX_CMD_HELP_SHORT("Calculate a sha224 checksum of a memory area.\n")
+BAREBOX_CMD_HELP_TEXT("Calculate a SHA224 digest over a FILE or a memory area.")
 BAREBOX_CMD_HELP_END
 
 BAREBOX_CMD_START(sha224sum)
 	.cmd		= do_sha224,
-	.usage		= "sha224 checksum calculation",
+	BAREBOX_CMD_DESC("calculate SHA224 digest")
+	BAREBOX_CMD_OPTS("FILE|AREA")
 	BAREBOX_CMD_GROUP(CMD_GRP_FILE)
 	BAREBOX_CMD_HELP(cmd_sha224sum_help)
 BAREBOX_CMD_END
@@ -146,13 +146,13 @@ static int do_sha256(int argc, char *argv[])
 }
 
 BAREBOX_CMD_HELP_START(sha256sum)
-BAREBOX_CMD_HELP_USAGE("sha256sum [[FILE] [AREA]]...\n")
-BAREBOX_CMD_HELP_SHORT("Calculate a sha256 checksum of a memory area.\n")
+BAREBOX_CMD_HELP_TEXT("Calculate a SHA256 digest over a FILE or a memory area.")
 BAREBOX_CMD_HELP_END
 
 BAREBOX_CMD_START(sha256sum)
 	.cmd		= do_sha256,
-	.usage		= "sha256 checksum calculation",
+	BAREBOX_CMD_DESC("calculate SHA256 digest")
+	BAREBOX_CMD_OPTS("FILE|AREA")
 	BAREBOX_CMD_GROUP(CMD_GRP_FILE)
 	BAREBOX_CMD_HELP(cmd_sha256sum_help)
 BAREBOX_CMD_END