Re: [gentoo-user] OT: sed on the commandline
Etaoin Shrdlu [11-02-12 14:36]: > On Sat, 12 Feb 2011 14:11:20 +0100 > meino.cra...@gmx.de wrote: > > > Alan McKinnon [11-02-12 13:44]: > > > Apparently, though unproven, at 13:25 on Saturday 12 February 2011, > > > meino.cra...@gmx.de did opine thusly: > > > > > > > Hi, > > > > > > > > I am trying to instruct sed to insert a line of text before > > > > a matched line. The whole command should fit into one > > > > physical (command) line. > > > > > > > > Is it possible? And how is it possible? > > > > > > > > Thank you very much for any hint in advance! > > > > Best regards, > > > > mcc > > > > > > > > > There's nothing special about a line, it's just a bunch of characters > > > that end with a newline (itself just a character). > > > > > > But you can't insert stuff at arbitrary points, you can only replace > > > stuff with other stuff. You can replace the start of line marker (^), > > > so do this: > > > > > > $ cat sed.txt > > > 1 > > > 2 > > > $ cat sed.txt | sed -e 's/^/a\n/g' > > > a > > > 1 > > > a > > > 2 > > > > > > I replaced "start of line" with "a and a newline". Modify the regex to > > > suit your needs. This gets awkward though, as you can search with a > > > regex but only replace a literal. If you need to insert some line > > > before any line containing say a "z" for example, then that is way > > > beyond sed's capabilities and you are into awk|perl territory. > > > > > > You didn't clearly state what you are trying to do with examples, so > > > the above vague wishy-washy goop is the best I can do for you. > > > > > > > > > -- > > > alan dot mckinnon at gmail dot com > > > > > > > Hi, > > > > I update my MakeHuman svn source and the Blender svn source on a daily > > basis. Currently the Blender folks did a change in the registration > > code for Blender scripts. The MakeHuman folks provide a script, which > > is needed to load the putput of MakeHuman into Blender. This script > > isn't "new registration ready". > > > > I have to do the following the changes to the Makehuman script (a > > handfull): > > > > change this: === > > def registration() > >
Re: [gentoo-user] OT: sed on the commandline
On Sat, 12 Feb 2011 14:11:20 +0100 meino.cra...@gmx.de wrote: > Alan McKinnon [11-02-12 13:44]: > > Apparently, though unproven, at 13:25 on Saturday 12 February 2011, > > meino.cra...@gmx.de did opine thusly: > > > > > Hi, > > > > > > I am trying to instruct sed to insert a line of text before > > > a matched line. The whole command should fit into one > > > physical (command) line. > > > > > > Is it possible? And how is it possible? > > > > > > Thank you very much for any hint in advance! > > > Best regards, > > > mcc > > > > > > There's nothing special about a line, it's just a bunch of characters > > that end with a newline (itself just a character). > > > > But you can't insert stuff at arbitrary points, you can only replace > > stuff with other stuff. You can replace the start of line marker (^), > > so do this: > > > > $ cat sed.txt > > 1 > > 2 > > $ cat sed.txt | sed -e 's/^/a\n/g' > > a > > 1 > > a > > 2 > > > > I replaced "start of line" with "a and a newline". Modify the regex to > > suit your needs. This gets awkward though, as you can search with a > > regex but only replace a literal. If you need to insert some line > > before any line containing say a "z" for example, then that is way > > beyond sed's capabilities and you are into awk|perl territory. > > > > You didn't clearly state what you are trying to do with examples, so > > the above vague wishy-washy goop is the best I can do for you. > > > > > > -- > > alan dot mckinnon at gmail dot com > > > > Hi, > > I update my MakeHuman svn source and the Blender svn source on a daily > basis. Currently the Blender folks did a change in the registration > code for Blender scripts. The MakeHuman folks provide a script, which > is needed to load the putput of MakeHuman into Blender. This script > isn't "new registration ready". > > I have to do the following the changes to the Makehuman script (a > handfull): > > change this: === > def registration() >
Re: [gentoo-user] OT: sed on the commandline
Alan McKinnon [11-02-12 13:44]: > Apparently, though unproven, at 13:25 on Saturday 12 February 2011, > meino.cra...@gmx.de did opine thusly: > > > Hi, > > > > I am trying to instruct sed to insert a line of text before > > a matched line. The whole command should fit into one > > physical (command) line. > > > > Is it possible? And how is it possible? > > > > Thank you very much for any hint in advance! > > Best regards, > > mcc > > > There's nothing special about a line, it's just a bunch of characters that > end > with a newline (itself just a character). > > But you can't insert stuff at arbitrary points, you can only replace stuff > with other stuff. You can replace the start of line marker (^), so do this: > > $ cat sed.txt > 1 > 2 > $ cat sed.txt | sed -e 's/^/a\n/g' > a > 1 > a > 2 > > I replaced "start of line" with "a and a newline". Modify the regex to suit > your needs. This gets awkward though, as you can search with a regex but only > replace a literal. If you need to insert some line before any line containing > say a "z" for example, then that is way beyond sed's capabilities and you are > into awk|perl territory. > > You didn't clearly state what you are trying to do with examples, so the > above > vague wishy-washy goop is the best I can do for you. > > > -- > alan dot mckinnon at gmail dot com > Hi, I update my MakeHuman svn source and the Blender svn source on a daily basis. Currently the Blender folks did a change in the registration code for Blender scripts. The MakeHuman folks provide a script, which is needed to load the putput of MakeHuman into Blender. This script isn't "new registration ready". I have to do the following the changes to the Makehuman script (a handfull): change this: === def registration()
Re: [gentoo-user] OT: sed on the commandline
On Sat, 12 Feb 2011 12:25:20 +0100 meino.cra...@gmx.de wrote: > Hi, > > I am trying to instruct sed to insert a line of text before > a matched line. The whole command should fit into one > physical (command) line. > > Is it possible? And how is it possible? sed 's/matchingline/insertedline\n&/'
Re: [gentoo-user] OT: sed on the commandline
On 02/12/2011 06:25 AM, meino.cra...@gmx.de wrote: > > Hi, > > I am trying to instruct sed to insert a line of text before > a matched line. The whole command should fit into one > physical (command) line. > > Is it possible? And how is it possible? > > Thank you very much for any hint in advance! > Best regards, > mcc > > > Try the ampersand "&" like the example below. Make a file of phone numbers. $ cat phone.txt 555-1212 555-1234 555- Then run the following command to prefix the number with 212 and a dash. $ sed 's/555/212-&/' phone.txt 212-555-1212 212-555-1234 212-555- Try moving the ampersand around the replacement string. If moved to the beginning it transposes the numbers. Note: The dash was moved to make the result look better, it has nothing to do with the command. $ sed 's/555/&-212/' phone.txt 555-212-1212 555-212-1234 555-212-
Re: [gentoo-user] OT: sed on the commandline
Apparently, though unproven, at 13:25 on Saturday 12 February 2011, meino.cra...@gmx.de did opine thusly: > Hi, > > I am trying to instruct sed to insert a line of text before > a matched line. The whole command should fit into one > physical (command) line. > > Is it possible? And how is it possible? > > Thank you very much for any hint in advance! > Best regards, > mcc There's nothing special about a line, it's just a bunch of characters that end with a newline (itself just a character). But you can't insert stuff at arbitrary points, you can only replace stuff with other stuff. You can replace the start of line marker (^), so do this: $ cat sed.txt 1 2 $ cat sed.txt | sed -e 's/^/a\n/g' a 1 a 2 I replaced "start of line" with "a and a newline". Modify the regex to suit your needs. This gets awkward though, as you can search with a regex but only replace a literal. If you need to insert some line before any line containing say a "z" for example, then that is way beyond sed's capabilities and you are into awk|perl territory. You didn't clearly state what you are trying to do with examples, so the above vague wishy-washy goop is the best I can do for you. -- alan dot mckinnon at gmail dot com
