Question

如何在代码树中多个文件中存在的特定函数的末尾插入一行文本。
下面的示例示例
file1 - location - /home/tmp/a/a.sh

 NSArray *Array = [[NSArray alloc]initWithObjects:@"001", nil];
 NSMutableDictionary *Diction = [NSMutableDictionary dictionary];
 [Diction setObject:[NSString stringWithFormat:@"%@",Array] 
 forKey:@":val"];


  AWSDynamoDBObjectMapper *dynamoDBObjectMapper = 
 [AWSDynamoDBObjectMapper defaultDynamoDBObjectMapper];

UserDetails_Male *User = [UserDetails_Male new];

AWSDynamoDBScanExpression *scanExpression = [AWSDynamoDBScanExpression 
new];

scanExpression.filterExpression = @"UserID = :val";
scanExpression.expressionAttributeValues = @{@":val":Array};



[[dynamoDBObjectMapper scan:[User class]
                 expression:scanExpression]
 continueWithBlock:^id(AWSTask *task) {
     if (task.error) {
         NSLog(@"The request failed. Error: [%@]", task.error);
     } else {
         AWSDynamoDBPaginatedOutput *paginatedOutput = task.result;
         for (UserDetails_Male *book in paginatedOutput.items) {
             //Do something with book.
             NSLog(@"Data: %@",book);
         }
     }
     return nil;
  }];


-(void)BatchReq{
          AWSDynamoDBKeysAndAttributes * keysAndAttributes = [ 
           AWSDynamoDBKeysAndAttributes new ];      
           AWSDynamoDBAttributeValue * attributeValue2 = [ 
           AWSDynamoDBAttributeValue new ];
           attributeValue2.SS = Array;                                        

            keysAndAttributes.keys = @[ @{ @"UserId" : 
            attributeValue1 }, ];
            keysAndAttributes.consistentRead = @YES;
            AWSDynamoDBBatchGetItemInput * batchGetItemInput = [ 
            AWSDynamoDBBatchGetItemInput new ];
            batchGetItemInput.requestItems = @{ @"DynamoDB-OM-Sample" 
            : keysAndAttributes };

          AWSDynamoDB * awsDynamoDB = [ AWSDynamoDB defaultDynamoDB 
                    ];
           [ [ awsDynamoDB batchGetItem: batchGetItemInput ]
           continueWithExecutor: [ AWSExecutor mainThreadExecutor ]
               withBlock: ^ id ( AWSTask * task ) {

                   if ( task.result ) {
                       NSLog ( @"it's working!!" );
                   }
                   else {
                       NSLog ( @"not working... " );
                   }

                   return nil;
               } ];

file2 - location - /home/tmp/b/b.sh

hello()
{
   echo "line 1"
   echo "line 2"
   insert new line of text "good bye" here
}

我正在尝试使用sed命令，但上面这个场景看起来有点棘手。

Answer 1

使用GNU sed：

sed '/^hello()/,/^}/s/^}/   insert new line of text "good bye" here\n&/' file

如果你想编辑你的文件＆＃34;就地＆＃34;使用sed的选项-i。

Answer 2

基本思想是寻找功能规范行直到函数结束行，并在该范围内，在函数结束行之前插入额外的文本：

<强> it59.sed

/^hello()/,/^}/ { /^}/i\
    insert new line of text "goodbye" here
}

<强>用法

sed -f it59.sed file1.sh file2.sh

或者，使用GNU sed进行原位编辑：

sed -i -f it59.sed file1.sh file2.sh

或者，使用BSD进行原位编辑sed：

sed -i '' -f it59.sed file1.sh file2.sh

等

示例输入

hello()
{
   echo "line 1"
   echo "line 2"
   #insert new line of text "good bye" here
}

hello()
{
   echo "line 1"
   echo "line 2"
   echo "line 3"
   echo "line 4"
   #insert new line of text "good bye" here
}

示例输出

hello()
{
   echo "line 1"
   echo "line 2"
   #insert new line of text "good bye" here
insert new line of text "goodbye" here
}

hello()
{
   echo "line 1"
   echo "line 2"
   echo "line 3"
   echo "line 4"
   #insert new line of text "good bye" here
insert new line of text "goodbye" here
}

请注意sed忽略了前导空格。这是一件令人讨厌的事。修复这个问题有点困难。

<强> it61.sed

/^hello()/,/^}/ { /^}/ { h; s/.*/   insert new line of text "goodbye" here/p; x; }; }

对于从函数开始到函数结束的范围，如果该行与函数的结尾匹配，则将该行复制到保留空间，用新文本替换该行并打印该行，并且交换保持空间。 BSD }需要sed之后的分号，而GNU sed不需要分号。当然，也可以在命令行上写出该单行。多线版本（it59.sed）在命令行上写入时需要一些小心 - 同样，GNU sed具有与BSD sed不同的规则，并允许BSD sed无法做到的事情吨。（POSIX sed在这些问题上比GNU sed更接近BSD sed。）

示例输出

hello()
{
   echo "line 1"
   echo "line 2"
   #insert new line of text "good bye" here
   insert new line of text "goodbye" here
}

hello()
{
   echo "line 1"
   echo "line 2"
   echo "line 3"
   echo "line 4"
   #insert new line of text "good bye" here
   insert new line of text "goodbye" here
}

在函数末尾插入一行文本

2 个答案: