我想替换文件的第二行,我知道$use用于最后一行,但不知道怎么说最后一行.
parallel (
{
ignore(FAILURE) {
build( "Build2Test",BUILDFILE: "",WARFILE: "http://maven.example.com/130602.0.war",STUDY: "UK",BUG: "33323" )
}},)
解决方法
以下内容应该有效(请注意,在某些系统上,您可能需要删除所有注释)：
sed '1 { # if this is the first line
h # copy to hold space
d # delete pattern space and return to start
}
/^}},$/ { # if this line matches regex /^}},$/
x # exchange pattern and hold space
b # print pattern space and return to start
}
H # append line to hold space
${ # if this is the last line
x # exchange pattern and hold space
s/^}},/}}/ # replace "}}," at start of pattern space with "}}"
b # print pattern space and return to start
}
d # delete pattern space and return to start'
或者紧凑版：
sed '1{h;d};/^}},$/{x;b};H;${x;s/^}},/}}/;b};d'
例：
$echo 'parallel (
{
ignore(FAILURE) {
build( "Build2Test",)' | sed '1{h;d};/^}},/}}/;b};d'
parallel (
{
ignore(FAILURE) {
build( "Build2Test",BUG: "33323" )
}}
)
