Reformat | Add custom .bib

.local/bin/getbib

@@ -1,81 +1,71 @@
-#!/bin/dash
+#!/bin/sh
 
 BIB_FILE="${HOME}/latex/uni.bib"
+[ -f "${BIB_FILE}" ] || BIB_FILE="${2:-$(find "${HOME}" -path "${HOME}/.*" \
+	-prune -o -type "f" -name "*.bib" -print -quit)}"
 
-correction_method() {
-        sed -n -E 's/.*((DOI|doi)((\.(org))?\/?|:? *))([^: ]+[^ .]).*/\6/p; T; q'
+{ [ -f "${BIB_FILE}" ] || [ "${2}" ]; } || {
+	printf "%s\n" "Create a .bib file or provide as \$2." && exit "1"
 }
 
-get_doi_from_pdf() {
+filter() {
+	sed -n -E 's/.*((DOI|doi)((\.(org))?\/?|:? *))([^: ]+[^ .]).*/\6/p; T; q'
+}
+
+fpdf() {
         pdf="${1}"
-        doi="$(pdfinfo "${pdf}" 2> "/dev/null" | correction_method)"
+	doi="$(pdfinfo "${pdf}" 2> "/dev/null" | filter)"
 
-	[ -z "${doi}" ] && doi="$(pdftotext -q -l "2" "${pdf}" - 2> "/dev/null" | correction_method)"
+	[ "${doi}" ] || doi="$(pdftotext -q -l "2" "${pdf}" - 2> "/dev/null" | filter)"
 
-	[ -z "${doi}" ] && echo "No DOI found for PDF: ${pdf}" >&2 && return "1"
+	[ "${doi}" ] || printf "%s\n" "No DOI found for PDF: ${pdf}" >&2
 
-	echo "${doi}"
+	printf "%s\n" "${doi}"
 }
 
-correct_names() {
-        sed 's/\}, /\},\n	/g
- 	 s/, /,\n	/
-         s/ }/\n}/
-	 s/,\s*pages=/,\n\tpages=/' |
-                sed '1s/^ *//
-         1s/[0-9]*\([0-9]\{2\}\)/\1/
-         1s/_//
-         1s/.*/\L&/
-	 s/.*=/\L&/
-	 s/=/ = /'
+arrange() {
+	sed 's/\}, /\},\n	/g
+		s/, /,\n	/
+		s/ }/\n}/
+		s/,\s*pages=/,\n\tpages=/' |
+        sed '1s/^ *//
+        	1s/[0-9]*\([0-9]\{2\}\)/\1/
+        	1s/_//
+        	1s/.*/\L&/
+		s/.*=/\L&/
+		s/=/ = /'
 }
 
-process_doi() {
-        doi="${1}"
-        bibtex_entry="$(curl -s "https://api.crossref.org/works/${doi}/transform/application/x-bibtex" | correct_names)"
-        red_color='\033[0;31m'
-        reset_color='\033[0m'
+doi2bib() {
+        doi="${1#doi:}"
+	url="https://api.crossref.org/works/${doi}/transform/application/x-bibtex"
+        entry="$(curl -kLsS --no-fail "${url}" | arrange)"
+        red='\033[0;31m'
+        reset='\033[0m'
 
-        printf "${red_color}%s${reset_color}\n" "${bibtex_entry}"
+        printf "${red}%s${reset}\n" "${entry}"
 
-	[ -z "${bibtex_entry}" ] && [ "$(echo "${bibtex_entry}" | cut -c2)" != "@" ] && {
-		echo "Failed to fetch bibtex entry for DOI: ${doi}"
+	[ "${entry%"${entry#?}"}" != "@" ] && {
+		printf "%s\n" "Failed to fetch bibtex entry for DOI: ${doi}"
 		return "1"
 	}
 
-        grep -iFq "doi = {${doi}}" "${BIB_FILE}" || {
-                [ -s "${BIB_FILE}" ] && echo "" >> "${BIB_FILE}"
-		echo "${bibtex_entry}" >> "${BIB_FILE}"
-                echo "Added bibtex entry for DOI: ${doi}"
-		return "0"
-        }
-
-        echo "Bibtex entry for DOI: ${doi} already exists in the file."
-}
-
-[ -z "${1}" ] && {
-	echo "Give either a pdf file or a DOI or a directory path that has PDFs as an argument."
-	exit "0"
-}
-
-[ -d "${1}" ] && {
-        for pdf in "${1}"/*.pdf; do
-                doi="$(get_doi_from_pdf "${pdf}")"
-                [ -n "${doi}" ] && process_doi "${doi}"
-        done
-
-	exit "0"
-}
-
-[ -f "${1}" ] && [ "$(echo "${1}" | grep -c "\.pdf$")" -ne "0" ] && {
-        doi="$(get_doi_from_pdf "${1}")"
-
-	[ -n "${doi}" ] && {
-                process_doi "${doi}"
-                exit "0"
+	grep -iFq "doi = {${doi}}" "${BIB_FILE}" 2> "/dev/null" && {
+		printf "%s\n" "Bibtex entry for DOI: ${doi} already exists in the file."
+	} || {
+		[ -s "${BIB_FILE}" ] && printf "\n" >> "${BIB_FILE}"
+		printf "%s\n" "${entry}" >> "${BIB_FILE}"
+		printf "%s\n" "Added bibtex entry for DOI: ${doi}"
         }
 }
 
-doi="$(echo "${1}" | correction_method)"
+[ "${1}" ] || {
+	printf "%s\n" "Give either a pdf file or a DOI or a directory path that has PDFs as an argument."
+	exit "1"
+}
 
-[ -n "${doi}" ] && process_doi "${doi}"
+[ -f "${1}" ] && doi="$(fpdf "${1}")" && doi2bib "${doi}" && exit "0"
+
+[ -d "${1}" ] && for i in "${1}"/*.pdf; do doi="$(fpdf "${i}")" && doi2bib "${doi}"; done && exit "0"
+
+doi="$(printf "%s\n" "${1}" | filter)" && doi2bib "${doi}"