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将上一行的部分内容复制到下面

tag-icon • tag-icon text-processing cygwin
将上一行的部分内容复制到下面

我有一个具有以下结构的文件：

GO:0000001      mitochondrion inheritance
GO:0000002      mitochondrial genome maintenance
GO:0000003      reproduction
alt_id: GO:0019952
alt_id: GO:0050876
GO:0000005      obsolete ribosomal chaperone activity
GO:0000006      high-affinity zinc uptake transmembrane transporter activity
GO:0000007      low-affinity zinc ion transmembrane transporter activity
GO:0000008      obsolete thioredoxin
alt_id: GO:0000013
GO:0000009      alpha-1,6-mannosyltransferase activity

它所说的alt_id意思是它是以前GO:代码的替代品。我想添加alt_id前一个的定义GO:，也就是说，我想要这样的输出：

GO:0000001      mitochondrion inheritance
GO:0000002      mitochondrial genome maintenance
GO:0000003      reproduction
alt_id: GO:0019952     reproduction
alt_id: GO:0050876     reproduction
GO:0000005      obsolete ribosomal chaperone activity
GO:0000006      high-affinity zinc uptake transmembrane transporter activity
GO:0000007      low-affinity zinc ion transmembrane transporter activity
GO:0000008      obsolete thioredoxin
alt_id: GO:0000013      obsolete thioredoxin
GO:0000009      alpha-1,6-mannosyltransferase activity

如何复制下面上一行的内容？我在基于 Windows 的环境中使用 Cygwin。

答案1

与awk，不确定它是否会起作用Cygwin

$ awk '{ if(/^alt_id/){$0 = $0" "p} else{p = ""; for (i=2; i<=NF; i++) p = p" "$i} } 1' ip.txt
GO:0000001      mitochondrion inheritance
GO:0000002      mitochondrial genome maintenance
GO:0000003      reproduction
alt_id: GO:0019952  reproduction
alt_id: GO:0050876  reproduction
GO:0000005      obsolete ribosomal chaperone activity
GO:0000006      high-affinity zinc uptake transmembrane transporter activity
GO:0000007      low-affinity zinc ion transmembrane transporter activity
GO:0000008      obsolete thioredoxin
alt_id: GO:0000013  obsolete thioredoxin
GO:0000009      alpha-1,6-mannosyltransferase activity
  • alt_id对于行首不匹配的每一行，使用变量 ( p) 保存从两行开始的所有列
  • 当行在行开头匹配时alt_id，将变量的内容附加到变量p中包含的输入行$0
  • 最后1是打印内容的快捷方式$0

答案2

该任务可以通过以下方式轻松完成sed

sed '
    N  #append next line (operate with `line1\nline2`);
    /\nalt_id/s/\([^0-9]*\)\n.*/&\1/
       #if next line starts with `alt_id` the append end of present line
    P  #print present line (all before `\n`)
    D  #remove all before `\n`, starts from begin with remain part (line2)
    ' file

另一种方法是使用保留空间

sed '
    /^alt_id:/G #if line starts by `alt_id:` append hold-space
    s/\n//      #remove `\n`ewline symbol
    t           #if removing success pass further commands (go to end)
    h           #if no (for other lines) copy it to hold-space
    s/\S*//     #remove all non-space symbols from start till first space
    x           #exchange hold-space and pattern-space ==
                #+put resedue into hold-space and return full line
    ' file

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