パターン1に最も近い一致からパターン2より前のすべての行を印刷します。

関連して、keeping a pattern space comprising all text since the last match "Compiling", but there can be thousands of lines without an error. Would it be very inefficient?印刷を開始する前に、一致する区切り記号のペアを識別するために入力ファイルを２回通過するなど、他の選択肢よりも効率が悪く、入力がファイルに保存されているかどうかに関係なく動作するという利点がある。パイプ。

次の機能を備えたシステムを使用する場合、最も効率的なアプローチは、次の間に呼び出しで2を使用することですtac。awktac

$ tac file |
    awk '/^error:/{f=1; print "---separator---"} f; /^Compiling/{f=0}' |
        tac
Compiling File3
... commands ...
In file included from ...
In file included from ...
In file included from ...
error: could not find A
---separator---
Compiling File5
... commands ...
In file included from ...
In file included from ...
In file included from ...
error: could not find B
---separator---

それ以外の場合は、すべてのUnixシステムのすべてのシェルでawkを使用してください。

$ awk '
    /^Compiling/ { buf="" }
    { buf = buf $0 "\n" }
    /^error:/ { print buf "---separator---" }
' file
Compiling File3
... commands ...
In file included from ...
In file included from ...
In file included from ...
error: could not find A
---separator---
Compiling File5
... commands ...
In file included from ...
In file included from ...
In file included from ...
error: could not find B
---separator---

または、複数文字のRSとRTにGNU awkを使用します。

$ awk -v RS='\nerror:[^\n]+' -v ORS='\n---separator---\n' '
    sub(/(^|.*\n)Compiling/,"Compiling") { print $0 RT }
' file
Compiling File3
... commands ...
In file included from ...
In file included from ...
In file included from ...
error: could not find A
---separator---
Compiling File5
... commands ...
In file included from ...
In file included from ...
In file included from ...
error: could not find B
---separator---