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@garybernhardt
Created October 29, 2014 19:45
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find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_CTYPE=C tr -C '[:alnum:]-_' '\n') | egrep '^--[\-_[:alnum:]]+$' | sort | uniq -c | sort -n
@igalic
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igalic commented Oct 29, 2014

egrep: Invalid range end
xargs: cat: terminated by signal 13

@garybernhardt
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your grep has a different syntax; debug it and I'll update

@fj
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fj commented Oct 29, 2014

Using grep -P instead of egrep should work everywhere:

find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_CTYPE=C tr -C '[:alnum:]-_' '\n') | grep -P '^--[\-_[:alnum:]]+$' | sort | uniq -c | sort -n
      1 --crate-type
      1 --emit
      1 --html-after-content
      1 --html-before-content
      1 --html-in-header
      1 --input-format
      1 --library-path
      1 --no-defaults
      1 --output
      1 --output-format
      1 --plugin-path
      1 --plugins
      1 --release
      1 --target
      2 --help
      2 --passes
      4 --init
      5 --proxy-server

http://twitter.com/jxxf/

@garybernhardt
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$ grep -P
usage: grep [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZ] [-A num] [-B num] [-C[num]]

@garybernhardt
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wait, I suck

@garybernhardt
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Wait, no, I don't suck. My grep's usage says that it supports -P. But the man page doesn't list -P, and trying to use it results in usage. OK.

$ grep -P foo
usage: grep [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZ] [-A num] [-B num] [-C[num]]

@igalic
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igalic commented Oct 29, 2014

heh… unix…

igalic@levix ~ % find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_CTYPE=C tr -C '[:alnum:]-_' '\n') | grep -P '^--[\-_[:alnum:]]+$'
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
igalic@levix ~ % 

(i got the same when i just replaced egrep with ack [which is essentially perl])

@igalic
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igalic commented Oct 29, 2014

(this is some bitter sweet irony ;)

@fj
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fj commented Oct 29, 2014

cool, looks like Apple removed -P in 10.8 but never updated the spec for it: http://stackoverflow.com/questions/16658333/grep-p-no-longer-works-how-can-i-rewrite-my-searches

computers

@garybernhardt
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can someone not on OS X try this version, with perl instead of grep?

find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_CTYPE=C tr -C '[:alnum:]-_' '\n') | perl -ne 'print if /^--[\w-]+$/' | grep -v '^-*$' | sort | uniq -c | sort -n

@colby
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colby commented Oct 29, 2014

Err, not on OSX.

DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"
vagrant@utility01:~$ find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_CTYPE=C tr -C '[:alnum:]-_' '\n') | perl -ne 'print if /^--[\w-]+$/' | grep -v '^-*$' | sort | uniq -c | sort -n
vagrant@utility01:~$ echo $?
0

@garybernhardt
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try replacing LC_CTYPE with LC_ALL

@garybernhardt
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well @colby I still want to figure out why tr is bailing like that

@colby
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colby commented Oct 29, 2014

Sorry, updated with something not OSX. I would assume you're on OSX.

@colby
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colby commented Oct 29, 2014

Running same VM as above.

vagrant@utility01:~$ find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_ALL=C tr -C '[:alnum:]-_' '\n') | perl -ne 'print if /^--[\w-]+$/' | grep -v '^-*$' | sort | uniq -c | sort -n
vagrant@utility01:~$ echo $?
0

@garybernhardt
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I give up, fuck computers

@mgedmin
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mgedmin commented Oct 29, 2014

I'm on Ubuntu 14.10. Your command produces no output.

(That would be because man pages are compressed on Debian. Change the find to use -iname '*.1' -o -iname '*.1.gz' and xargs cat to xargs zcat.)

Also, the final sort should be sort -n, otherwise it puts 93 between 8 and 9. This is be locale-specific -- LC_COLLATE=C sort doesn't ignore leading whitespace.

@garybernhardt
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the final sort is sort -n

@mgedmin
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mgedmin commented Oct 29, 2014

Now I'm wondering what are those 162 commands that support --1v. And I suspect 28 -----syntax and 17 -----examples aren't really options.

@mgedmin
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mgedmin commented Oct 29, 2014

(It's difficult to copy and paste a line of text from a horizontally-scrolling div. I accidentally the final -n. Sorry.)

@schmonz
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schmonz commented Oct 29, 2014

:; find $(manpath | tr ':' '\n') -iname '*.1' | xargs cat | (LC_CTYPE=C tr -C '[:alnum:]-_' '\n') | perl -ne 'print if /^--[\w-]+$/' | grep -v '^-*$' | sort | uniq -c | sort -n
ksh: manpath: not found
tr: unknown option -- C
usage: tr [-cs] string1 string2
       tr [-c] -d string1
       tr [-c] -s string1
       tr [-c] -ds string1 string2
find: unknown option -- i
find: unknown option -- n
find: unknown option -- a
find: unknown option -- m
find: unknown option -- e
find: *.1: No such file or directory

:; uname -mrs
NetBSD 6.1.5 amd64

(FWIW, if I were chasing portability in shell programming, I'd probably punt on making this a one-liner. Make a script, define well-named functions, make their composition evident, then futz with implementation details of each function.)

@garybernhardt
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OS X's zcat append ".Z" to all paths not already ending with it, so that doesn't work. Using gzcat instead fails because it tries to decompress everything, so uncompressed man pages blow up. I bet that Ubuntu has saved its users as much as ten megabytes of disk space by compressing the man pages! :/

@garybernhardt
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triple click selects full lines of text, which is useful for situations like this (although I don't know whether various Linux dinguses will do the right thing there; probably not)

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