61 lines
1.5 KiB
Bash
61 lines
1.5 KiB
Bash
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#!/bin/sh
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#
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# Downloads sequence for the GRCh38 release 84 version of H. sapiens (human) from
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# Ensembl.
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#
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# Note that Ensembl's GRCh38 build has three categories of compressed fasta
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# files:
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#
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# The base files, named ??.fa.gz
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#
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# By default, this script builds and index for just the base files,
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# since alignments to those sequences are the most useful. To change
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# which categories are built by this script, edit the CHRS_TO_INDEX
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# variable below.
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#
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ENSEMBL_RELEASE=84
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ENSEMBL_GRCh38_BASE=ftp://ftp.ensembl.org/pub/release-${ENSEMBL_RELEASE}/fasta/homo_sapiens/dna
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get() {
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file=$1
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if ! wget --version >/dev/null 2>/dev/null ; then
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if ! curl --version >/dev/null 2>/dev/null ; then
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echo "Please install wget or curl somewhere in your PATH"
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exit 1
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fi
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curl -o `basename $1` $1
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return $?
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else
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wget $1
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return $?
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fi
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}
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HISAT2_BUILD_EXE=./hisat2-build
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if [ ! -x "$HISAT2_BUILD_EXE" ] ; then
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if ! which hisat2-build ; then
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echo "Could not find hisat2-build in current directory or in PATH"
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exit 1
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else
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HISAT2_BUILD_EXE=`which hisat2-build`
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fi
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fi
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rm -f genome.fa
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F=Homo_sapiens.GRCh38.dna.primary_assembly.fa
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if [ ! -f $F ] ; then
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get ${ENSEMBL_GRCh38_BASE}/$F.gz || (echo "Error getting $F" && exit 1)
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gunzip $F.gz || (echo "Error unzipping $F" && exit 1)
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mv $F genome.fa
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fi
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CMD="${HISAT2_BUILD_EXE} -p 4 genome.fa genome"
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echo Running $CMD
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if $CMD ; then
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echo "genome index built; you may remove fasta files"
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else
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echo "Index building failed; see error message"
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fi
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