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如何使用awk sed或shell腳本合並兩個不同的行

[英]How to combine two different rows by using awk sed or shell script

我有一個文件file.txt。 我必須將兩個不同的行合並為一個。

file.txt的

                  linux-
02-10-2018 11:50  is-a-opensource  user    file
02-10-2018 11:46  linux-userfile   user    file1
                                   user-1
02-10-2018 11:40  linux-userfile   user    file2
                  linux-           user-2
02-10-2018 11:30  linux-userfile   user    file3

預期產量

 02-10-2018 11:50  linux-is-a-opensource  user    file
 02-10-2018 11:46  linux-userfile         user    file1
 02-10-2018 11:40  linux-userfile         user1user    file2
 02-10-2018 11:30  linux-linux-userfile         user-2user    file3

任何建議將不勝感激。

我嘗試使用下面的命令,但沒有這樣做。

  $ awk ' /^ +/{ gsub(/^ +/," ");a=a $0; next }{ $2=$2a;a=""}1' file.txt 

我遇到錯誤了

  02-10-2018 11:50 linux- is-a-opensource user file
  02-10-2018 11:46 linux-userfile user file1
  02-10-2018 11:40 user-1 linux-userfile user file2
  02-10-2018 11:30 linux-           user-2 linux-userfile user file3

並且我嘗試了以下鏈接以供參考,但仍然出現相同的錯誤如何使用awk在Linux中合​​並2條不同的行

如何在Linux Shell腳本中合並文本文件中同一行中的兩行

由於很難確定字符串屬於哪一列,因此我作以下假設:

  • 完美對齊且空間分隔

因此以下腳本將假定:

  • 不以日期開頭的行將合並到下一
  • 列的寬度將由下一行的列寬確定

注意:如果您的文件與空格對齊(制表符和空格的組合),則我們不能使用字段分隔符“ \\ t”來區分字段,因為制表符的數量取決於字段的寬度。

這是經過測試的腳本:

# If you have a tab-aligned file, replace all tabs by the
# correct sequence of spaces. In this example, we assume a single
# tab is equivalent to 8 spaces. Adopt if needed
{ gsub(/\t/,"        ",$0) }

# If the line does not start with a combination of numbers and hyphens
# it is a line that needs to be merged into the next line.
# store it and move to the next line
($1 !~ /^[-0-9]+$/) { tomerge=$0; next }

# If we picked up a tomerge line, try to figure out the fields
# by looking into the current line and determining the field widths.
(tomerge != "")  {
      # extract fields
      n=1 
      for(i=1;i<NF;++i) {
         m=index($0,$(i+1))
         field[i]=substr(tomerge,n,m-n)
         sub(/^[[:blank:]]*/,"",field[i])  # remove leading blanks
         sub(/[[:blank:]]*$/,"",field[i])  # remove trailing blanks
         n=m
      }
      field[NF]=substr(tomerge,n)
      # perform merging
      for(i=1;i<=NF;++i) $i= field[i] $i
      # reset the tomerge value
      tomerge=""
}
# print the line
{ $1=$1;print $0 }

輸出:

$ awk -f script.awk file.txt
02-10-2018 11:50 linux-is-a-opensource user file
02-10-2018 11:46 linux-userfile user file1
02-10-2018 11:40 linux-userfile user-1user file2
02-10-2018 11:30 linux-linux-userfile user-2user file3

如果要對齊,可以將其傳遞給column -t

$ awk -f script.awk file.txt | column -t

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