1 #! /bin/sed -nf 2 # Script to add @group...@end group tags to sed.texi.in 3 # so that comments are not separated from the instructions 4 # that they refer to. 5 6 # Step 1: search for the conventional "@c start----" comment 7 1a\ 8 @c Do not edit this file!! It is automatically generated from sed-in.texi. 9 p 10 /^@c start-*$/! b 11 12 # Step 2: loop until we find a @ command 13 :a 14 n 15 p 16 /^@/! ba 17 18 # Step 3: process everything until a "@end" command 19 20 # Step 3.1: Print the blank lines before the group. If we reach the "@end", 21 # we go back to step 1. 22 :b 23 n 24 /^@end/ { 25 p 26 b 27 } 28 /^[ ]*$/ { 29 p 30 bb 31 } 32 33 # Step 3.2: Add to hold space every line until an empty one or "@end" 34 h 35 :c 36 n 37 /^@end example/! { 38 /^[ ]*$/! { 39 H 40 bc 41 } 42 } 43 44 # Step 3.3: Working in hold space, add @group...@end group if there are 45 # at least two lines. Then print the lines we processed and 46 # switch back to pattern space. 47 x 48 /\n/ { 49 s/.*/@group\ 50 &\ 51 @end group/ 52 } 53 p 54 55 # Step 3.4: Switch back to pattern space, print the first blank line 56 # and possibly go back to step 3.1 57 x 58 p 59 /^@end/ !bb 60
