Sed 塞德：还记得第二个表达式中的捕获吗

我试图找到捕获模式的出现，并用捕获模式预挂起下一行

例如：

...
[line 10] #---------- SOLID: tank_phys.0
[line 11]   Shape {
...
[line 22] #---------- SOLID: head_phys.0
[line 23]   Shape {  
...

预期产出：

...
[line 10] #---------- SOLID: tank_phys.0
[line 11]   DEF tank Shape {
...
[line 22] #---------- SOLID: head_phys.0
[line 23]   DEF head Shape {   
...

以下是我所拥有的：

sed -rn '/#---------- SOLID: (.*)_phys.0/{n ; s/Shape/DEF <PreviousCapture> Shape/p;}' g4_00.wrl

sed-rn'/#------------固体：（.*）_phys.0/{n；s/Shape/DEF Shape/p；}'g4_00.wrl

如何将

形状{

替换为

DEF油箱形状{

谢谢

---

GT

遵循简单的

awk

同样可以帮助您

awk '/#---------- SOLID/{print;sub(/_.*/,"",$NF);val=$NF;getline;sub("Shape {","DEF " val " &")} 1'  Input_file

输出如下

[line 10] #---------- SOLID: tank_phys.0
[line 11]   DEF tank Shape {
...
[line 22] #---------- SOLID: head_phys.0
[line 23]   DEF head Shape {

---

使用纯

sed

解决方案：

输入：

$ cat file
#---------- SOLID: tank_phys.0
  Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  Shape { 
12345
gdfg

$ sed -rn '/#---------- SOLID: (.*)_phys.0/{p;s/#---------- SOLID: (.*)_phys.0/DEF \1/;N;s/\n//;s/ {2,}/ /;s/^/  /p;b};/#---------- SOLID: (.*)_phys.0/!p' file

#---------- SOLID: tank_phys.0
  DEF tank Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  DEF head Shape { 
12345
gdfg

/#---------- SOLID: (.*)_phys.0/{ #this block will be executed on each line respecting the regex /#---------- SOLID: (.*)_phys.0/
p; #print the line
s/#---------- SOLID: (.*)_phys.0/DEF \1/; #replace the line content using backreference to form DEF ...
N;#append next line Shape { to the pattern buffer
s/\n//;s/ {2,}/ /;s/^/  /p; #remove the new line, add/remove some spaces
b}; #jump to the end of the statements
/#---------- SOLID: (.*)_phys.0/!p #lines that does not respect the regex will just be printed

命令：

$ cat file
#---------- SOLID: tank_phys.0
  Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  Shape { 
12345
gdfg

$ sed -rn '/#---------- SOLID: (.*)_phys.0/{p;s/#---------- SOLID: (.*)_phys.0/DEF \1/;N;s/\n//;s/ {2,}/ /;s/^/  /p;b};/#---------- SOLID: (.*)_phys.0/!p' file

#---------- SOLID: tank_phys.0
  DEF tank Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  DEF head Shape { 
12345
gdfg

/#---------- SOLID: (.*)_phys.0/{ #this block will be executed on each line respecting the regex /#---------- SOLID: (.*)_phys.0/
p; #print the line
s/#---------- SOLID: (.*)_phys.0/DEF \1/; #replace the line content using backreference to form DEF ...
N;#append next line Shape { to the pattern buffer
s/\n//;s/ {2,}/ /;s/^/  /p; #remove the new line, add/remove some spaces
b}; #jump to the end of the statements
/#---------- SOLID: (.*)_phys.0/!p #lines that does not respect the regex will just be printed

输出：

$ cat file
#---------- SOLID: tank_phys.0
  Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  Shape { 
12345
gdfg

$ sed -rn '/#---------- SOLID: (.*)_phys.0/{p;s/#---------- SOLID: (.*)_phys.0/DEF \1/;N;s/\n//;s/ {2,}/ /;s/^/  /p;b};/#---------- SOLID: (.*)_phys.0/!p' file

#---------- SOLID: tank_phys.0
  DEF tank Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  DEF head Shape { 
12345
gdfg

/#---------- SOLID: (.*)_phys.0/{ #this block will be executed on each line respecting the regex /#---------- SOLID: (.*)_phys.0/
p; #print the line
s/#---------- SOLID: (.*)_phys.0/DEF \1/; #replace the line content using backreference to form DEF ...
N;#append next line Shape { to the pattern buffer
s/\n//;s/ {2,}/ /;s/^/  /p; #remove the new line, add/remove some spaces
b}; #jump to the end of the statements
/#---------- SOLID: (.*)_phys.0/!p #lines that does not respect the regex will just be printed

解释：

$ cat file
#---------- SOLID: tank_phys.0
  Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  Shape { 
12345
gdfg

$ sed -rn '/#---------- SOLID: (.*)_phys.0/{p;s/#---------- SOLID: (.*)_phys.0/DEF \1/;N;s/\n//;s/ {2,}/ /;s/^/  /p;b};/#---------- SOLID: (.*)_phys.0/!p' file

#---------- SOLID: tank_phys.0
  DEF tank Shape {
abcdef
1234
#---------- SOLID: head_phys.0
  DEF head Shape { 
12345
gdfg

/#---------- SOLID: (.*)_phys.0/{ #this block will be executed on each line respecting the regex /#---------- SOLID: (.*)_phys.0/
p; #print the line
s/#---------- SOLID: (.*)_phys.0/DEF \1/; #replace the line content using backreference to form DEF ...
N;#append next line Shape { to the pattern buffer
s/\n//;s/ {2,}/ /;s/^/  /p; #remove the new line, add/remove some spaces
b}; #jump to the end of the statements
/#---------- SOLID: (.*)_phys.0/!p #lines that does not respect the regex will just be printed

你可以试试这个

sed -E '
  /SOLID/!b
  N
  s/(^.*SOLID: )([^_]*)(.*\n)([[:blank:]]*)(.*$)/\1\2\3\4DEF \2 \5/
' infile

---

将第一个

sed

的结果存储在一个变量中，然后在第二个

sed

中使用该变量？请在您的帖子中的代码标签中添加更多示例，这不清楚。如果我想一次性处理整个文件，这将不起作用。该文件包含我显示的模式的多个实例。谢谢。如果您能告诉我您是如何处理的，也许可以我们在想什么？你能检查一下我的

sed

解决方案吗？效果很好，现在让我觉得我对sed一无所知。thanksI更新了输入，以明确行数不总是相同的，因此此awk解决方案不起作用，thanks@user1301295，您的输出在您的帖子中看起来不一致，显示了为什么

{

不是第一次出现的

形状

？如果是打字错误，那么你会尝试我的代码。我刚刚测试过，它工作正常，请告诉我。编辑完成，谢谢。你能解释更多代码吗？我只是在学习sed，awk对我来说是新的me@user1301295，请务必根据您的需要编辑代码，并将添加说明太快了，干杯：）