regex - Detection of pattern in bash -


the file working looks (only last 2 lines shown):

[16]((((((((((648:0.0167313,(((839:0.00281972,903: [62](((909:0.00419522,895:0.00419522):0.004454hgip: 76898

in bash, how check whether last line contains string hgip - , if does, replace last line after [] expression line above (the penultimate line) this:

[16]((((((((((648:0.0167313,(((839:0.00281972,903: [62]((((((((((648:0.0167313,(((839:0.00281972,903:

so number should retained original rest of line copied penultimate line. numeric @ beginning of line not 2 characters long length. after braces there (.....

like:

sed -n '/hgip/{s/].*/]/;g;s/\n//g};p;{s/\[[0-9]*\]//;x}'

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