在git filter命令中使用bash数组(即在引号内)

时间:2013-07-31 18:35:24

标签: bash

我正在尝试在git过滤器命令中循环一个数组,这意味着在“”内部,我似乎无法正确使用语法。我试图在循环中的当前迭代中获取数组的值,但变量保持空白,在运行sed命令时给出错误。如果可以的话请帮忙。请注意,我的脚本中的其他变量工作。

declare -a oldFSarray=(principiumI principiumII principiumIII principiumIV prollecture1 prollecture2 prollecture3 prollecture4 prollecture4b prollecture5 prollecture6 prollecture7 prollecture8 prollecture9 prollecture10 prollecture11 prollecture12 prollecture13 prollecture14 prollecture15 prollecture16 prollecture17 prollecture18 dthreelecture19 dthreeaonelecture20 dthreeaonelecture21 dthreeaonelecture22 dthreeaonelecture23 dthreeaonelecture24 dthreeatwolecture25 dthreeathreelecture26 dthreeafourlecture27 dthreeafivelecture28 dthreeafivelecture29 dthreeasixlecture30 dthreesixlecture30b dthreeasixlecture31 donelecture32 donelecture33 donelecture34 donelecture35 donelecture36 donelecture37 donelecture38 donelecture39 donelecture40 donelecture41 donelecture42 donelecture43 donelecture44 donelecture45 donelecture46 donelecture47 donelecture48 donelecture49 donelecture50 donelecture51 donelecture52 donelecture53 dTlecture54 dTlecture55 dTlecture56 dTlecture57 dTlecture58 dTlecture59 dTlecture60 dTlecture61 dTlecture62 dTlecture63 dTlecture64 dTlecture65 dTlecture66 dTlecture67 dTlecture68 dTlecture69 dTlecture70 dTlecture71 dTlecture72 dTlecture73 dTlecture74 dTlecture75 dTlecture76 dTlecture77 dClecture78 dClecture79 dClecture80 dClecture81 dClecture82 dClecture83 dClecture84 dClecture85 dClecture86 dClecture87 dClecture88 dClecture89 dClecture90 dClecture91 dClecture92 dLlecture93 dLlecture94 dLlecture95 dLlecture96 dLlecture97 dLlecture98 dLlecture99 dLlecture100 dLlecture101 dLlecture102 dLlecture103 dLlecture104 dLlecture105 dLlecture106 dLlecture107 dLlecture108 dLlecture109 dLlecture110 dLlecture111 dLlecture112 dLlecture113 dLlecture114 dLlecture115 dLlecture116 dLlecture117 dLlecture118 dLlecture119 dLlecture120 dLlecture121 dLlecture122 dLlecture123 dLlecture124 dLlecture125 dLlecture126 dLlecture127 dIlecture128 dIlecture129 dIlecture130 dIlecture131 dIlecture132)
declare -a newFSarray=(principiumI principiumII principiumIII principiumIV Lectio_1 Lectio_2 Lectio_3 Lectio_4 Lectio_5 Lectio_6 Lectio_7 Lectio_8 Lectio_9 Lectio_10 Lectio_11 Lectio_12 Lectio_13 Lectio_14 Lectio_15 Lectio_16 Lectio_17 Lectio_18 Lectio_19 Lectio_20 Lectio_21 Lectio_22 Lectio_23 Lectio_24 Lectio_25 Lectio_26 Lectio_27 Lectio_28 Lectio_29 Lectio_30 Lectio_31 Lectio_32 Lectio_33 Lectio_34 Lectio_35 Lectio_36 Lectio_37 Lectio_38 Lectio_39 Lectio_40 Lectio_41 Lectio_42 Lectio_43 Lectio_44 Lectio_45 Lectio_46 Lectio_47 Lectio_48 Lectio_49 Lectio_50 Lectio_51 Lectio_52 Lectio_53 Lectio_54 Lectio_55 Lectio_56 Lectio_57 Lectio_58 Lectio_59 Lectio_60 Lectio_61 Lectio_62 Lectio_63 Lectio_64 Lectio_65 Lectio_66 Lectio_67 Lectio_68 Lectio_69 Lectio_70 Lectio_71 Lectio_72 Lectio_73 Lectio_74 Lectio_75 Lectio_76 Lectio_77 Lectio_78 Lectio_79 Lectio_80 Lectio_81 Lectio_82 Lectio_83 Lectio_84 Lectio_85 Lectio_86 Lectio_87 Lectio_88 Lectio_89 Lectio_90 Lectio_91 Lectio_92 Lectio_93 Lectio_94 Lectio_95 Lectio_96 Lectio_97 Lectio_98 Lectio_99 Lectio_100 Lectio_101 Lectio_102 Lectio_103 Lectio_104 Lectio_105 Lectio_106 Lectio_107 Lectio_108 Lectio_109 Lectio_110 Lectio_111 Lectio_112 Lectio_113 Lectio_114 Lectio_115 Lectio_116 Lectio_117 Lectio_118 Lectio_119 Lectio_120 Lectio_121 Lectio_122 Lectio_123 Lectio_124 Lectio_125 Lectio_126 Lectio_127 Lectio_128 Lectio_129 Lectio_130 Lectio_131 Lectio_132 Lectio_133 Lectio_134)

function gitNameChangeFilter()
{
oldfs=$1
newfs=$2
oldln=$3
newln=$4
basedirectory=$5
mv $basedirectory/$oldfs $basedirectory/$newfs
cd $basedirectory/$newfs
    git filter-branch --tree-filter "
        #test and then change edited text
        if [ -e $oldfs.xml ]
            then
                mv $oldfs.xml $newfs.xml 
                for i in {0..137}
                    do
                        old=$oldFSarray[$i] //HERE IS THE PROBLEM
                        echo $old
                        new=$newFSarray[$i] //HERE TOO
                        echo $new
                        sed -i.bak 's/$old/$new/g' $newfs.xml //Error comes back that basically says $old is empty
                    done

                sed -i.bak 's/Lectio $oldln/Lectio $newln/g' $newfs.xml 

            else
                echo 'Nothing to do $oldfs does not exist'
        fi  
}

2 个答案:

答案 0 :(得分:2)

在bash中,当您在双引号字符串($var)中使用"The value of var is $var"时,bash会立即展开它。对于传递给git的参数中的所有$variable引用都会发生这种情况,因此,例如,old=${oldFSarray[$i]}将被$i使用的oldFSarray元素替换运行git命令时$i的值。

但是,在子shell中设置old的内容并不重要,因为在下一行($old)中使用echo $old将立即替换为当前$old的值(如果有的话),所以脚本的部分是

old=$oldFSarray[$i]
echo $old

可能会扩展到类似的东西:

old=PrincipiumI[]
echo

(注意:您的脚本使用old=$oldFSarray[$i],这不是下标数组的语法。正确的语法在上面的第一段,${oldFSarray[$i]}

我相信你所期待的是git会收到带有变量引用的bash脚本,然后执行它们。为了使其工作,您需要使用撇号(')包围脚本,而不是双引号。

但是,您还需要注意git将在子shell中执行脚本,并且子shell只能访问导出的shell变量。从bash 4.2开始,至少不能导出数组变量。 (也就是说,你可以export,但它没有效果。)所以你需要在传递给git的脚本中创建数组。

这可能看起来令人生畏,但幸运的是declare -p以可以直接评估的格式打印出值。所以你可以这样做:

oldFSarray=(value1 value2 value3...)
export make_oldFSarray="$(declare -p oldFSarray)"
#...
git filter-branch --treefilter="
   $make_oldFSarray
   $make_newFSarray"'
   # From here on down, $foo is not substituted
   '

答案 1 :(得分:0)

您缺少使用索引对数组名称进行分组的大括号,而对于sed命令,您需要使用双引号来扩展shell变量。

                    old=${oldFSarray[$i]}
                    new=${newFSarray[$i]}
                    sed -i.bak "s/$old/$new/g" $newfs.xml