Renaming files inside folders

Question

I have several folders ,where each folder contain two files fastq.gz. Usually they are named as sample_R1.fastq.gz and sample_R2.fastq.gz. where sample_ can represent the folder name ,or something else.

But in my case the folders are :

1008_a
2085_a
2130_a
2192_a
2221_a
2242_a
2269_a
2482_a

And each of these folder consists of these files as :

1008_a Files : C85CBANXX_s6_1_O07_0452_SL137634.fastq.gz C85CBANXX_s6_2_O07_0452_SL137634.fastq.gz

2085_a :

C7V65ANXX_s6_1_M19_0413_SL131164.fastq.gz C7V65ANXX_s6_2_M19_0413_SL131164.fastq.gz

How can I rename these files to just like 1008_a_R1.fastq.gz & 1008_a_R2.fastq.gz for folder 1008_a

2085_a_R1.fastq.gz ,2085_a_R2.fastq.gz for folder 2085_a

And so on ,since all other folders have different kinds of patterns inside them.

Thanks, Ron

Answer 1

find + bash solution:

Sample folder structure (for ex. 1080_a and 2085_a):

$ tree 1008_a/ 2085_a/
1008_a/
├── C85CBANXX_s6_1_O07_0452_SL137634.fastq.gz
└── C85CBANXX_s6_2_O07_0452_SL137634.fastq.gz
2085_a/
├── C7V65ANXX_s6_1_M19_0413_SL131164.fastq.gz
└── C7V65ANXX_s6_2_M19_0413_SL131164.fastq.gz

---

The job:

find . -type f -regextype posix-egrep \
-regex ".*/[0-9]{4}_a/[[:alnum:]_]+_[12]_[[:alnum:]_]+\.fastq\.gz$" -exec bash -c \
'path=${0%/*}/; bn=${0##*/}; dir_n=${0%/*}; dir_n=${dir_n##*/}; 
 new_fn=$(sed -E "s/.+_([12])_.+(\.fastq\.gz)$/${dir_n}_R\1\2/" <<<"$bn"); 
 mv "$0" "$path$new_fn"' {} \;

---

Results:

$ tree 1008_a/ 2085_a/
1008_a/
├── 1008_a_R1.fastq.gz
└── 1008_a_R2.fastq.gz
2085_a/
├── 2085_a_R1.fastq.gz
└── 2085_a_R2.fastq.gz