Move reference fetching code into a sub-library

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "opendetex"]
-	path = opendetex
+	path = reference_fetcher/opendetex
 	url = https://github.com/Phyks/opendetex

README.md

@@ -8,19 +8,19 @@ For building `opendetex` (which is a necessary dependency), you will need
 
 * Clone this repository: `git clone https://github.com/Phyks/arxiv_metadata`.
 * Init submodules (`opendetex`): `git submodule init; git submodule update`.
-* Build `opendetex`: `cd opendetex; make`.
+* Build `opendetex`: `cd reference_fetcher/opendetex; make`.
 * You are ready to go.
 
 ## Usage
 
-* `./main.py some_file.bbl` to get a list of DOIs associated to each `\bibitem`.
+* `./fetch_references.py some_file.bbl` to get a list of DOIs associated to each `\bibitem`.
-* `./main.py arxiv_eprint_id` to get a list of DOIs associated to each reference from the provided arXiv eprint.
+* `./fetch_references.py arxiv_eprint_id` to get a list of DOIs associated to each reference from the provided arXiv eprint.
 
 
 ## Example
 
 ```
-$ ./main.py 1401.2910
+$ ./fetch_references.py 1401.2910
 ```
 
 ```
@@ -67,7 +67,7 @@ $ ./main.py 1401.2910
 
 
 ```
-$ ./main.py /tmp/test.bbl
+$ ./fetch_reference.py /tmp/test.bbl
 ```
 
 ```

fetch_references.py

@@ -3,8 +3,8 @@ import os
 import sys
 
 # Local import
-import arxiv
+from ..reference_fetcher import arxiv
-import bbl
+from ..reference_fetcher import bbl
 
 
 if __name__ == "__main__":

reference_fetcher/arxiv.py

@@ -1,11 +1,12 @@
 """
 This file contains all the arXiv-specific functions.
 """
-import bbl
 import io
 import requests
 import tarfile
 
+from . import bbl
+
 
 def sources_from_arxiv(eprint):
     """

reference_fetcher/bbl.py

@@ -1,14 +1,14 @@
 """
 This files contains all the functions to deal with bbl files.
 """
-import doi
 import math
 import os
 import requests
 import subprocess
 
-import regex
+from . import doi
-import tools
+from . import regex
+from . import tools
 
 
 def clean_bibitem(bibitem):

reference_fetcher/doi.py

@@ -3,8 +3,8 @@ This file contains all the DOI-related functions.
 """
 import requests
 
-import regex
+from . import regex
-import tools
+from . import tools
 
 
 def extract_doi_links(urls):