adiciona vírgula antes de determinado caractere

Question

Eu tenho este arquivo CSV:

"ADFS-Administrators","Administrator-Access","arn:aws:iam::279052847476:saml-provider/companyADFS"
"ADFS-amtest-ro","arn:aws:iam::279052847476:saml-provider/companyADFS"
"AWSAccCorpAdmin","arn:aws:iam::279052847476:saml-provider/LastPass"
"AWScompanyCorpAdmin","arn:aws:iam::279052847476:saml-provider/LastPass"
"AWScompanyCorpPowerUser","arn:aws:iam::279052847476:saml-provider/LastPass"
"flowlogsRole","oneClick_flowlogsRole_1495032428381",
"companyDevShutdownEC2Instaces","oneClick_lambda_basic_execution_1516271285849",
"companySAMLUser","arn:aws:iam::279052847476:saml-provider/companyAzureAD"
"lambda_stop_rundeck_instance","oneClick_lambda_basic_execution_1519651160794",
"OneLoginAdmin","arn:aws:iam::279052847476:saml-provider/OneLoginAdmin"
"OneLoginDev","arn:aws:iam::279052847476:saml-provider/OneLoginDev"
"vmimport","vmimport",
"workspaces_DefaultRole","SkyLightServiceAccess",

Eu quero adicionar outra vírgula em cada linha se após a primeira vírgula houver uma string que comece com arn:aws:iam:

Saída desejada (parcial):

"ADFS-amtest-ro",,"arn:aws:iam::279052847476:saml-provider/companyADFS"
"AWSAccCorpAdmin",,"arn:aws:iam::279052847476:saml-provider/LastPass"
"AWScompanyCorpAdmin",,"arn:aws:iam::279052847476:saml-provider/LastPass"
"AWScompanyCorpPowerUser",,"arn:aws:iam::279052847476:saml-provider/LastPass

Para linhas que não possuem a string que começa com arn:aws:iam , não altere nada.

    

Answer 1

com sed :

sed 's/^\([^,]*\)\(,"arn:aws:iam:\)/,/'

    

Answer 2

awk solução:

awk 'BEGIN{ FS=OFS="," }$2 ~ /^"arn:aws:iam:/{ $2 = ","$2 }1' file.csv

• $2 ~ /^"arn:aws:iam:/ - se o 2º campo $2 começar com "arn:aws:iam:
• $2 = ","$2 - prefixar o valor do 2º campo com ,

A saída:

"ADFS-Administrators","Administrator-Access","arn:aws:iam::279052847476:saml-provider/companyADFS"
"ADFS-amtest-ro",,"arn:aws:iam::279052847476:saml-provider/companyADFS"
"AWSAccCorpAdmin",,"arn:aws:iam::279052847476:saml-provider/LastPass"
"AWScompanyCorpAdmin",,"arn:aws:iam::279052847476:saml-provider/LastPass"
"AWScompanyCorpPowerUser",,"arn:aws:iam::279052847476:saml-provider/LastPass"
"flowlogsRole","oneClick_flowlogsRole_1495032428381",
"companyDevShutdownEC2Instaces","oneClick_lambda_basic_execution_1516271285849",
"companySAMLUser",,"arn:aws:iam::279052847476:saml-provider/companyAzureAD"
"lambda_stop_rundeck_instance","oneClick_lambda_basic_execution_1519651160794",
"OneLoginAdmin",,"arn:aws:iam::279052847476:saml-provider/OneLoginAdmin"
"OneLoginDev",,"arn:aws:iam::279052847476:saml-provider/OneLoginDev"
"vmimport","vmimport",
"workspaces_DefaultRole","SkyLightServiceAccess",