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為什麼「意外標記附近出現語法錯誤」？

tag-icon • tag-icon bash for error-handling
為什麼「意外標記附近出現語法錯誤」？

我有大約 10k（大約 180x50x2）CSV 文件，我想將它們連接在一起，如下所示，但內部 for 循環由於某些原因而失敗syntax error；我看不到其中的錯誤lastFile

#!/bin/bash
dir='/home/masi/CSV/'
targetDir='/tmp/'
ids=(118 119 120)
channels=(1 2)
for id in ids;

        do
        for channel in channels;

                # example filename P209C1T720-T730.csv
                lastFile="$dir'P'$id'C'$channel'T1790-T1800.csv'"
                # show warning if last file does not exist
                if [[ -f $lastFile ]]; then
                    echo "Last file "$lastFile" is missing" 
                    exit 1
                fi

                filenameTarget="$targetDir'P'$id'C'$channel'.csv'"
                cat $dir'P'$id'C'$channel'T'*'.csv' > $filenameTarget

        done;
done

錯誤

makeCSV.sh: line 12: syntax error near unexpected token `lastFile="$dir'P'$id'C'$channel'T1790-T1800.csv'"'
makeCSV.sh: line 12: `      lastFile="$dir'P'$id'C'$channel'T1790-T1800.csv'"'

作業系統：Debian 8.5
Linux 核心：4.6 向後移植

答案1

do你的第二個 for 迴圈中缺少一個：

for id in ids;

        do
        for channel in channels; do # <----- here ----

                # example filename P209C1T720-T730.csv
                lastFile="$dir'P'$id'C'$channel'T1790-T1800.csv'"
                # show warning if last file does not exist
                if [[ -f $lastFile ]]; then
                    echo "Last file "$lastFile" is missing" 
                    exit 1
                fi

                filenameTarget="$targetDir'P'$id'C'$channel'.csv'"
                cat $dir'P'$id'C'$channel'T'*'.csv' > $filenameTarget

        done;
done

根據評論中的討論，我發現您對循環語法感到困惑for。

這是循環的粗略語法for：

for name in list; do commands; done

do命令之前始終必須有一個命令，命令之後必須有一個;（或換行符） 。done

這是帶有更多換行符的變體：

for name in list
do
    commands
done

答案2

它工作正常：

#!/bin/bash
dir='/home/masi/CSV/'
targetDir='/tmp/'
ids=(118 119 120)
channels=(1 2)
for id in ids ; do

        # Add do after ';'
        for channel in channels ; do

                # example filename P209C1T720-T730.csv
                lastFile="$dir'P'$id'C'$channel'T1790-T1800.csv'"
                # show warning if last file does not exist
                if [[ -f $lastFile ]] ; then
                    echo "Last file "$lastFile" is missing" 
                    exit 1
                fi

                filenameTarget="$targetDir'P'$id'C'$channel'.csv'"
                cat $dir'P'$id'C'$channel'T'*'.csv' > $filenameTarget

        done
done

為了將來使用 bash 調試器：bash -x /路徑/到/你的/腳本。

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