Merge branch 'master' into taxonomy

.gitignore

@@ -127,3 +127,4 @@ ncbitaxo/merged.dmp
 ncbitaxo/names.dmp
 ncbitaxo/nodes.dmp
 ncbitaxo/readme.txt
+template.16S

Release-notes.md

@@ -2,13 +2,27 @@
 
 ## Latest changes
 
+### Bug fixes
+
+- In `obipairing`, correct the stats `seq_a_single` and `seq_b_single` when
+  on right alignment mode
+
+- Not really a bug but the memory impact of `obiuniq` has been reduced by reducing
+  the batch size and not reading the qualities from the fastq files as `obiuniq`
+  is producing only fasta output without qualities.
+
 ### New features
 
 -   Most of the time obitools identify automatically sequence file format. But
     it fails sometimes. Two new option **--fasta** and **--fastq** are added to
     allow the processing of the rare fasta and fastq files not recognized.
     
-## August 2nd, 2024. Release 4.3.0
+-   In `obiscript`, adds new methods to the Lua sequence object:
+    - `md5_string()`:  returning the MD5 check sum as an hexadecimal string,
+	- `subsequence(from,to)`: allows to extract a subsequence on a 0 based 
+            coordinate system, upper bound expluded like in go.
+	- `reverse_complement`: returning a sequence object corresponding to the reverse complement
+            of the current sequence.
 
 ### Change of git repositiory
 

cmd/obitools/obiuniq/main.go

@@ -30,6 +30,8 @@ func main() {
 	// trace.Start(ftrace)
 	// defer trace.Stop()
 
+	obioptions.SetBatchSize(10)
+	obioptions.SetReadQualities(false)
 	optionParser := obioptions.GenerateOptionParser(obiuniq.OptionSet)
 
 	_, args := optionParser(os.Args)

pkg/obialign/pairedendalign.go

@@ -485,7 +485,8 @@ func PECenterAlign(seqA, seqB *obiseq.BioSequence, gap, scale float64,
 
 func PEAlign(seqA, seqB *obiseq.BioSequence,
 	gap, scale float64, fastAlign bool, delta int, fastScoreRel bool,
-	arena PEAlignArena, shift_buff *map[int]int) (int, []int, int, int, float64) {
+	arena PEAlignArena, shift_buff *map[int]int) (bool, int, []int, int, int, float64) {
+	var isLeftAlign bool
 	var score, shift int
 	var startA, startB int
 	var partLen, over int
@@ -536,6 +537,7 @@ func PEAlign(seqA, seqB *obiseq.BioSequence,
 				rawSeqB = seqB.Sequence()[0:partLen]
 				qualSeqB = seqB.Qualities()[0:partLen]
 				extra3 = seqB.Len() - partLen
+				isLeftAlign = true
 				score = _FillMatrixPeLeftAlign(
 					rawSeqA, qualSeqA, rawSeqB, qualSeqB, gap, scale,
 					&arena.pointer.scoreMatrix,
@@ -557,7 +559,7 @@ func PEAlign(seqA, seqB *obiseq.BioSequence,
 				rawSeqA = seqA.Sequence()[:partLen]
 				qualSeqA = seqA.Qualities()[:partLen]
 				extra3 = partLen - seqA.Len()
-
+				isLeftAlign = false
 				score = _FillMatrixPeRightAlign(
 					rawSeqA, qualSeqA, rawSeqB, qualSeqB, gap, scale,
 					&arena.pointer.scoreMatrix,
@@ -581,6 +583,7 @@ func PEAlign(seqA, seqB *obiseq.BioSequence,
 				qualSeqB = seqB.Qualities()[0:partLen]
 				extra3 = seqB.Len() - partLen
 				score = 0
+				isLeftAlign = true
 			} else {
 				startA = 0
 				startB = -shift
@@ -589,6 +592,7 @@ func PEAlign(seqA, seqB *obiseq.BioSequence,
 				partLen = len(qualSeqB)
 				extra3 = partLen - seqA.Len()
 				qualSeqA = seqA.Qualities()[:partLen]
+				isLeftAlign = false
 			}
 			score = 0
 			for i, qualA := range qualSeqA {
@@ -625,6 +629,8 @@ func PEAlign(seqA, seqB *obiseq.BioSequence,
 			len(rawSeqA), len(rawSeqB),
 			&(arena.pointer.path))
 
+		isLeftAlign = false
+
 		scoreL := _FillMatrixPeLeftAlign(
 			rawSeqA, qualSeqA, rawSeqB, qualSeqB, gap, scale,
 			&arena.pointer.scoreMatrix,
@@ -634,9 +640,10 @@ func PEAlign(seqA, seqB *obiseq.BioSequence,
 			path = _Backtracking(arena.pointer.pathMatrix,
 				len(rawSeqA), len(rawSeqB),
 				&(arena.pointer.path))
+			isLeftAlign = true
 		}
 
 	}
 
-	return score, path, fastCount, over, fastScore
+	return isLeftAlign, score, path, fastCount, over, fastScore
 }

pkg/obichunk/chunk_on_disk.go

@@ -12,6 +12,13 @@ import (
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiseq"
 )
 
+// tempDir creates a temporary directory with a prefix "obiseq_chunks_"
+// in the system's temporary directory. It returns the path of the
+// created directory and any error encountered during the creation process.
+//
+// If the directory creation is successful, the path to the new
+// temporary directory is returned. If there is an error, it returns
+// an empty string and the error encountered.
 func tempDir() (string, error) {
 	dir, err := os.MkdirTemp(os.TempDir(), "obiseq_chunks_")
 	if err != nil {
@@ -20,6 +27,19 @@ func tempDir() (string, error) {
 	return dir, nil
 }
 
+// find searches for files with a specific extension in the given root directory
+// and its subdirectories. It returns a slice of strings containing the paths
+// of the found files.
+//
+// Parameters:
+// - root: The root directory to start the search from.
+// - ext: The file extension to look for (including the leading dot, e.g., ".txt").
+//
+// Returns:
+// A slice of strings containing the paths of files that match the specified
+// extension. If no files are found, an empty slice is returned. Any errors
+// encountered during the directory traversal will be returned as part of the
+// WalkDir function's error handling.
 func find(root, ext string) []string {
 	var a []string
 	filepath.WalkDir(root, func(s string, d fs.DirEntry, e error) error {
@@ -34,6 +54,24 @@ func find(root, ext string) []string {
 	return a
 }
 
+// ISequenceChunkOnDisk processes a sequence iterator by distributing the sequences
+// into chunks stored on disk. It uses a classifier to determine how to distribute
+// the sequences and returns a new iterator for the processed sequences.
+//
+// Parameters:
+//   - iterator: An iterator of biosequences to be processed.
+//   - classifier: A pointer to a BioSequenceClassifier used to classify the sequences
+//     during distribution.
+//
+// Returns:
+// An iterator of biosequences representing the processed chunks. If an error occurs
+// during the creation of the temporary directory or any other operation, it returns
+// an error along with a nil iterator.
+//
+// The function operates asynchronously, creating a temporary directory to store
+// the sequence chunks. Once the processing is complete, the temporary directory
+// is removed. The function logs the number of batches created and the processing
+// status of each batch.
 func ISequenceChunkOnDisk(iterator obiiter.IBioSequence,
 	classifier *obiseq.BioSequenceClassifier) (obiiter.IBioSequence, error) {
 	dir, err := tempDir()

pkg/obiformats/dispatcher.go

@@ -14,10 +14,40 @@ import (
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiiter"
 )
 
+// SequenceBatchWriterToFile is a function type that defines a method for writing
+// a batch of biosequences to a specified file. It takes an iterator of biosequences,
+// a filename, and optional configuration options, and returns an iterator of biosequences
+// along with any error encountered during the writing process.
+//
+// Parameters:
+// - iterator: An iterator of biosequences to be written to the file.
+// - filename: The name of the file where the sequences will be written.
+// - options: Optional configuration options for the writing process.
+//
+// Returns:
+// An iterator of biosequences that may have been modified during the writing process
+// and an error if the writing operation fails.
 type SequenceBatchWriterToFile func(iterator obiiter.IBioSequence,
 	filename string,
 	options ...WithOption) (obiiter.IBioSequence, error)
 
+// WriterDispatcher manages the writing of data to files based on a given
+// prototype name and a dispatcher for distributing the sequences. It
+// processes incoming data from the dispatcher in separate goroutines,
+// formatting and writing the data to files as specified.
+//
+// Parameters:
+//   - prototypename: A string that serves as a template for naming the output files.
+//   - dispatcher: An instance of IDistribute that provides the data to be written
+//     and manages the distribution of sequences.
+//   - formater: A function of type SequenceBatchWriterToFile that formats and writes
+//     the sequences to the specified file.
+//   - options: Optional configuration options for the writing process.
+//
+// The function operates asynchronously, launching goroutines for each new data
+// channel received from the dispatcher. It ensures that directories are created
+// as needed and handles errors during the writing process. The function blocks
+// until all writing jobs are completed.
 func WriterDispatcher(prototypename string,
 	dispatcher obiiter.IDistribute,
 	formater SequenceBatchWriterToFile,
@@ -34,7 +64,7 @@ func WriterDispatcher(prototypename string,
 				data, err := dispatcher.Outputs(newflux)
 
 				if err != nil {
-					log.Fatalf("Cannot retreive the new chanel : %v", err)
+					log.Fatalf("Cannot retrieve the new channel: %v", err)
 				}
 
 				key := dispatcher.Classifier().Value(newflux)
@@ -58,7 +88,7 @@ func WriterDispatcher(prototypename string,
 					info, err := os.Stat(directory)
 					switch {
 					case !os.IsNotExist(err) && !info.IsDir():
-						log.Fatalf("Cannot Create the directory %s", directory)
+						log.Fatalf("Cannot create the directory %s", directory)
 					case os.IsNotExist(err):
 						os.Mkdir(directory, 0755)
 					}
@@ -71,7 +101,7 @@ func WriterDispatcher(prototypename string,
 					options...)
 
 				if err != nil {
-					log.Fatalf("cannot open the output file for key %s",
+					log.Fatalf("Cannot open the output file for key %s",
 						dispatcher.Classifier().Value(newflux))
 				}
 

pkg/obiformats/fastqseq_read.go

@@ -131,7 +131,7 @@ func _storeSequenceQuality(bytes *bytes.Buffer, out *obiseq.BioSequence, quality
 	out.SetQualities(q)
 }
 
-func FastqChunkParser(quality_shift byte) func(string, io.Reader) (obiseq.BioSequenceSlice, error) {
+func FastqChunkParser(quality_shift byte, with_quality bool) func(string, io.Reader) (obiseq.BioSequenceSlice, error) {
 	parser := func(source string, input io.Reader) (obiseq.BioSequenceSlice, error) {
 
 		var identifier string
@@ -263,7 +263,9 @@ func FastqChunkParser(quality_shift byte) func(string, io.Reader) (obiseq.BioSeq
 				}
 			case 10:
 				if is_end_of_line {
-					_storeSequenceQuality(&qualBytes, sequences[len(sequences)-1], quality_shift)
+					if with_quality {
+						_storeSequenceQuality(&qualBytes, sequences[len(sequences)-1], quality_shift)
+					}
 					state = 11
 				} else {
 					qualBytes.WriteByte(C)
@@ -299,9 +301,10 @@ func _ParseFastqFile(
 	input ChannelFileChunk,
 	out obiiter.IBioSequence,
 	quality_shift byte,
+	with_quality bool,
 ) {
 
-	parser := FastqChunkParser(quality_shift)
+	parser := FastqChunkParser(quality_shift, with_quality)
 
 	for chunks := range input {
 		sequences, err := parser(chunks.Source, chunks.Raw)
@@ -339,6 +342,7 @@ func ReadFastq(reader io.Reader, options ...WithOption) (obiiter.IBioSequence, e
 			chkchan,
 			out,
 			byte(obioptions.InputQualityShift()),
+			opt.ReadQualities(),
 		)
 	}
 

pkg/obiformats/options.go

@@ -20,6 +20,7 @@ type __options__ struct {
 	appendfile            bool
 	compressed            bool
 	skip_empty            bool
+	with_quality          bool
 	csv_id                bool
 	csv_sequence          bool
 	csv_quality           bool
@@ -57,6 +58,7 @@ func MakeOptions(setters []WithOption) Options {
 		appendfile:            false,
 		compressed:            false,
 		skip_empty:            false,
+		with_quality:          true,
 		csv_id:                true,
 		csv_definition:        false,
 		csv_count:             false,
@@ -133,6 +135,10 @@ func (opt Options) SkipEmptySequence() bool {
 	return opt.pointer.skip_empty
 }
 
+func (opt Options) ReadQualities() bool {
+	return opt.pointer.with_quality
+}
+
 func (opt Options) CSVId() bool {
 	return opt.pointer.csv_id
 }
@@ -241,6 +247,14 @@ func OptionsSkipEmptySequence(skip bool) WithOption {
 	return f
 }
 
+func OptionsReadQualities(read bool) WithOption {
+	f := WithOption(func(opt Options) {
+		opt.pointer.with_quality = read
+	})
+
+	return f
+}
+
 func OptionsNewFile() WithOption {
 	f := WithOption(func(opt Options) {
 		opt.pointer.appendfile = false

pkg/obiiter/distribute.go

@@ -4,9 +4,25 @@ import (
 	"fmt"
 	"sync"
 
+	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obioptions"
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiseq"
 )
 
+// IDistribute represents a distribution mechanism for biosequences.
+// It manages the outputs of biosequences, provides a channel for
+// new data notifications, and maintains a classifier for sequence
+// classification. It is designed to facilitate the distribution
+// of biosequences to various processing components.
+//
+// Fields:
+//   - outputs: A map that associates integer keys with corresponding
+//     biosequence outputs (IBioSequence).
+//   - news: A channel that sends notifications of new data available
+//     for processing, represented by integer identifiers.
+//   - classifier: A pointer to a BioSequenceClassifier used to classify
+//     the biosequences during distribution.
+//   - lock: A mutex for synchronizing access to the outputs and other
+//     shared resources to ensure thread safety.
 type IDistribute struct {
 	outputs    map[int]IBioSequence
 	news       chan int
@@ -26,16 +42,39 @@ func (dist *IDistribute) Outputs(key int) (IBioSequence, error) {
 	return iter, nil
 }
 
+// News returns a channel that provides notifications of new data
+// available for processing. The channel sends integer identifiers
+// representing the new data.
 func (dist *IDistribute) News() chan int {
 	return dist.news
 }
 
+// Classifier returns a pointer to the BioSequenceClassifier
+// associated with the distribution mechanism. This classifier
+// is used to classify biosequences during the distribution process.
 func (dist *IDistribute) Classifier() *obiseq.BioSequenceClassifier {
 	return dist.classifier
 }
 
+// Distribute organizes the biosequences from the iterator into batches
+// based on the provided classifier and batch sizes. It returns an
+// IDistribute instance that manages the distribution of the sequences.
+//
+// Parameters:
+//   - class: A pointer to a BioSequenceClassifier used to classify
+//     the biosequences during distribution.
+//   - sizes: Optional integer values specifying the batch size. If
+//     no sizes are provided, a default batch size of 5000 is used.
+//
+// Returns:
+// An IDistribute instance that contains the outputs of the
+// classified biosequences, a channel for new data notifications,
+// and the classifier used for distribution. The method operates
+// asynchronously, processing the sequences in separate goroutines.
+// It ensures that the outputs are closed and cleaned up once
+// processing is complete.
 func (iterator IBioSequence) Distribute(class *obiseq.BioSequenceClassifier, sizes ...int) IDistribute {
-	batchsize := 5000
+	batchsize := obioptions.CLIBatchSize()
 
 	outputs := make(map[int]IBioSequence, 100)
 	slices := make(map[int]*obiseq.BioSequenceSlice, 100)

pkg/obilua/lua.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"fmt"
 	"os"
+	"reflect"
 
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiiter"
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obioptions"
@@ -119,11 +120,17 @@ func LuaWorker(proto *lua.FunctionProto) obiseq.SeqWorker {
 				case *obiseq.BioSequenceSlice:
 					return *val, err
 				default:
-					return nil, fmt.Errorf("worker function doesn't return the correct type %T", val)
+					r := reflect.TypeOf(val)
+					return nil, fmt.Errorf("worker function doesn't return the correct type %s", r)
 				}
 			}
 
-			return nil, fmt.Errorf("worker function doesn't return the correct type")
+			// If worker retuns nothing then it is considered as nil biosequence
+			if _, ok = lreponse.(*lua.LNilType); ok {
+				return nil, nil
+			}
+
+			return nil, fmt.Errorf("worker function doesn't return the correct type %T", lreponse)
 		}
 
 		return f

pkg/obilua/lua_push_interface.go

@@ -46,6 +46,8 @@ func pushInterfaceToLua(L *lua.LState, val interface{}) {
 		pushSliceNumericToLua(L, v)
 	case []bool:
 		pushSliceBoolToLua(L, v)
+	case []interface{}:
+		pushSliceInterfaceToLua(L, v)
 	case nil:
 		L.Push(lua.LNil)
 	case *sync.Mutex:
@@ -78,6 +80,29 @@ func pushMapStringInterfaceToLua(L *lua.LState, m map[string]interface{}) {
 	L.Push(luaTable)
 }
 
+func pushSliceInterfaceToLua(L *lua.LState, s []interface{}) {
+	// Create a new Lua table
+	luaTable := L.NewTable()
+	// Iterate over the Go map and set the key-value pairs in the Lua table
+	for _, value := range s {
+		switch v := value.(type) {
+		case int:
+			luaTable.Append(lua.LNumber(v))
+		case float64:
+			luaTable.Append(lua.LNumber(v))
+		case bool:
+			luaTable.Append(lua.LBool(v))
+		case string:
+			luaTable.Append(lua.LString(v))
+		default:
+			log.Fatalf("Doesn't deal with slice containing value %v of type %T", v, v)
+		}
+	}
+
+	// Push the Lua table onto the stack
+	L.Push(luaTable)
+}
+
 // pushMapStringIntToLua creates a new Lua table and iterates over the Go map to set key-value pairs in the Lua table. It then pushes the Lua table onto the stack.
 //
 // L *lua.LState - the Lua state

pkg/obilua/obiseq.go

@@ -47,18 +47,21 @@ func newObiSeq(luaState *lua.LState) int {
 }
 
 var bioSequenceMethods = map[string]lua.LGFunction{
-	"id":            bioSequenceGetSetId,
-	"sequence":      bioSequenceGetSetSequence,
-	"qualities":     bioSequenceGetSetQualities,
-	"definition":    bioSequenceGetSetDefinition,
-	"count":         bioSequenceGetSetCount,
-	"taxid":         bioSequenceGetSetTaxid,
-	"attribute":     bioSequenceGetSetAttribute,
-	"len":           bioSequenceGetLength,
-	"has_sequence":  bioSequenceHasSequence,
-	"has_qualities": bioSequenceHasQualities,
-	"source":        bioSequenceGetSource,
-	"md5":           bioSequenceGetMD5,
+	"id":                 bioSequenceGetSetId,
+	"sequence":           bioSequenceGetSetSequence,
+	"qualities":          bioSequenceGetSetQualities,
+	"definition":         bioSequenceGetSetDefinition,
+	"count":              bioSequenceGetSetCount,
+	"taxid":              bioSequenceGetSetTaxid,
+	"attribute":          bioSequenceGetSetAttribute,
+	"len":                bioSequenceGetLength,
+	"has_sequence":       bioSequenceHasSequence,
+	"has_qualities":      bioSequenceHasQualities,
+	"source":             bioSequenceGetSource,
+	"md5":                bioSequenceGetMD5,
+	"md5_string":         bioSequenceGetMD5String,
+	"subsequence":        bioSequenceGetSubsequence,
+	"reverse_complement": bioSequenceGetRevcomp,
 }
 
 // checkBioSequence checks if the first argument in the Lua stack is a *obiseq.BioSequence.
@@ -224,3 +227,30 @@ func bioSequenceGetMD5(luaState *lua.LState) int {
 	luaState.Push(rt)
 	return 1
 }
+
+func bioSequenceGetMD5String(luaState *lua.LState) int {
+	s := checkBioSequence(luaState)
+	md5 := s.MD5String()
+	luaState.Push(lua.LString(md5))
+	return 1
+}
+
+func bioSequenceGetSubsequence(luaState *lua.LState) int {
+	s := checkBioSequence(luaState)
+	start := luaState.CheckInt(2)
+	end := luaState.CheckInt(3)
+	subseq, err := s.Subsequence(start, end, false)
+	if err != nil {
+		luaState.RaiseError("%s : Error on subseq: %v", s.Id(), err)
+		return 0
+	}
+	luaState.Push(obiseq2Lua(luaState, subseq))
+	return 1
+}
+
+func bioSequenceGetRevcomp(luaState *lua.LState) int {
+	s := checkBioSequence(luaState)
+	revcomp := s.ReverseComplement(false)
+	luaState.Push(obiseq2Lua(luaState, revcomp))
+	return 1
+}

pkg/obioptions/options.go

@@ -30,6 +30,7 @@ var _PprofMudex = 10
 var _PprofGoroutine = 6060
 var _Quality_Shift_Input = byte(33)
 var _Quality_Shift_Output = byte(33)
+var _Read_Qualities = true
 
 var __taxdump__ = ""
 var __alternative_name__ = false
@@ -291,6 +292,10 @@ func CLIBatchSize() int {
 	return _BatchSize
 }
 
+func CLIReadQualities() bool {
+	return _Read_Qualities
+}
+
 // SetDebugOn sets the debug mode on.
 func SetDebugOn() {
 	_Debug = true
@@ -301,6 +306,10 @@ func SetDebugOff() {
 	_Debug = false
 }
 
+func SetReadQualities(status bool) {
+	_Read_Qualities = status
+}
+
 // SetWorkerPerCore sets the number of workers per CPU core.
 //
 // It takes a float64 parameter representing the number of workers

pkg/obioptions/version.go

@@ -7,8 +7,9 @@ import (
 // TODO: The version number is extracted from git. This induces that the version
 // corresponds to the last commit, and not the one when the file will be
 // commited
-var _Commit = "abfa8f3"
-var _Version = "Release 4.2.0"
+
+var _Commit = "39dd3e3"
+var _Version = "Release 4.3.0"
 
 // Version returns the version of the obitools package.
 //

pkg/obiseq/biosequence.go

@@ -12,6 +12,7 @@ package obiseq
 
 import (
 	"crypto/md5"
+	"encoding/hex"
 	"slices"
 	"sync"
 	"sync/atomic"
@@ -182,6 +183,9 @@ func (s *BioSequence) Copy() *BioSequence {
 	newSeq.sequence = CopySlice(s.sequence)
 	newSeq.qualities = CopySlice(s.qualities)
 	newSeq.feature = CopySlice(s.feature)
+	if s.revcomp != nil {
+		newSeq.revcomp = s.revcomp.Copy()
+	}
 
 	if len(s.annotations) > 0 {
 		s.annot_lock.Lock()
@@ -375,6 +379,11 @@ func (s *BioSequence) MD5() [16]byte {
 	return md5.Sum(s.sequence)
 }
 
+func (s *BioSequence) MD5String() string {
+	md5_hash := s.MD5()
+	return hex.EncodeToString(md5_hash[:])
+}
+
 // SetId sets the id of the BioSequence.
 //
 // Parameters:

pkg/obiseq/revcomp.go

@@ -55,8 +55,7 @@ func (sequence *BioSequence) ReverseComplement(inplace bool) *BioSequence {
 
 	if !inplace {
 		original = sequence
-		sequence.revcomp = sequence.Copy()
-		sequence = sequence.revcomp
+		sequence = sequence.Copy()
 		sequence.revcomp = original
 	}
 

pkg/obitools/obiconvert/sequence_reader.go

@@ -99,6 +99,8 @@ func CLIReadBioSequences(filenames ...string) (obiiter.IBioSequence, error) {
 		opts = append(opts, obiformats.OptionsFastSeqHeaderParser(obiformats.ParseGuessedFastSeqHeader))
 	}
 
+	opts = append(opts, obiformats.OptionsReadQualities(obioptions.CLIReadQualities()))
+
 	nworkers := obioptions.CLIReadParallelWorkers()
 	if nworkers < 2 {
 		nworkers = 2

pkg/obitools/obipairing/pairing.go

@@ -9,6 +9,7 @@ import (
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiiter"
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obioptions"
 	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiseq"
+	"git.metabarcoding.org/obitools/obitools4/obitools4/pkg/obiutils"
 )
 
 func _Abs(x int) int {
@@ -112,7 +113,7 @@ func AssemblePESequences(seqA, seqB *obiseq.BioSequence,
 	inplace bool, fastAlign, fastModeRel bool,
 	arenaAlign obialign.PEAlignArena, shifh_buff *map[int]int) *obiseq.BioSequence {
 
-	score, path, fastcount, over, fastscore := obialign.PEAlign(
+	isLeftAlign, score, path, fastcount, over, fastscore := obialign.PEAlign(
 		seqA, seqB,
 		gap, scale,
 		fastAlign, delta, fastModeRel,
@@ -143,19 +144,14 @@ func AssemblePESequences(seqA, seqB *obiseq.BioSequence,
 	if aliLength >= minOverlap && identity >= minIdentity {
 		annot["mode"] = "alignment"
 		if withStats {
-			if left < 0 {
-				annot["seq_a_single"] = -left
+			if isLeftAlign {
 				annot["ali_dir"] = "left"
+				annot["seq_a_single"] = obiutils.Abs(left)
+				annot["seq_b_single"] = obiutils.Abs(right)
 			} else {
-				annot["seq_b_single"] = left
 				annot["ali_dir"] = "right"
-			}
-
-			if right < 0 {
-				right = -right
-				annot["seq_a_single"] = right
-			} else {
-				annot["seq_b_single"] = right
+				annot["seq_a_single"] = obiutils.Abs(right)
+				annot["seq_b_single"] = obiutils.Abs(left)
 			}
 		}
 		if inplace {

pkg/obitools/obitagpcr/options.go

@@ -9,7 +9,7 @@ import (
 var _reorientate = false
 
 func TagPCROptionSet(options *getoptions.GetOpt) {
-	options.BoolVar(&_reorientate, "reference-db", _reorientate,
+	options.BoolVar(&_reorientate, "reorientate", _reorientate,
 		options.Description("Reverse complemente reads if needed to store all the sequences in "+
 			"the same orientation respectively to forward and reverse primers"))
 

pkg/obitools/obitagpcr/pcrtag.go

@@ -64,7 +64,7 @@ func IPCRTagPESequencesBatch(iterator obiiter.IBioSequence,
 	newIter := obiiter.MakeIBioSequence()
 	newIter.MarkAsPaired()
 
-	f := func(iterator obiiter.IBioSequence, wid int) {
+	f := func(iterator obiiter.IBioSequence) {
 		arena := obialign.MakePEAlignArena(150, 150)
 		shifts := make(map[int]int)
 
@@ -89,46 +89,51 @@ func IPCRTagPESequencesBatch(iterator obiiter.IBioSequence,
 
 					forward_match := annot["obimultiplex_forward_match"].(string)
 					forward_mismatches := annot["obimultiplex_forward_error"].(int)
-					forward_tag := annot["obimultiplex_forward_tag"].(string)
 
 					reverse_match := annot["obimultiplex_reverse_match"].(string)
 					reverse_mismatches := annot["obimultiplex_reverse_error"].(int)
-					reverse_tag := annot["obimultiplex_reverse_tag"].(string)
 
 					sample := annot["sample"].(string)
 					experiment := annot["experiment"].(string)
 
 					aanot := A.Annotations()
+					banot := B.Annotations()
+
+					if value, ok := annot["obimultiplex_forward_tag"]; ok {
+						forward_tag := value.(string)
+						aanot["obimultiplex_forward_tag"] = forward_tag
+						banot["obimultiplex_forward_tag"] = forward_tag
+					}
+
+					if value, ok := annot["obimultiplex_reverse_tag"]; ok {
+						reverse_tag := value.(string)
+						aanot["obimultiplex_reverse_tag"] = reverse_tag
+						banot["obimultiplex_reverse_tag"] = reverse_tag
+					}
+
 					aanot["obimultiplex_direction"] = direction
 
 					aanot["obimultiplex_forward_match"] = forward_match
 					aanot["obimultiplex_forward_mismatches"] = forward_mismatches
-					aanot["obimultiplex_forward_tag"] = forward_tag
 
 					aanot["obimultiplex_reverse_match"] = reverse_match
 					aanot["obimultiplex_reverse_mismatches"] = reverse_mismatches
-					aanot["obimultiplex_reverse_tag"] = reverse_tag
 
 					aanot["sample"] = sample
 					aanot["experiment"] = experiment
 
-					banot := B.Annotations()
 					banot["obimultiplex_direction"] = direction
 
 					banot["obimultiplex_forward_match"] = forward_match
 					banot["obimultiplex_forward_mismatches"] = forward_mismatches
-					banot["obimultiplex_forward_tag"] = forward_tag
 
 					banot["obimultiplex_reverse_match"] = reverse_match
 					banot["obimultiplex_reverse_mismatches"] = reverse_mismatches
-					banot["obimultiplex_reverse_tag"] = reverse_tag
 
 					banot["sample"] = sample
 					banot["experiment"] = experiment
 
 					if CLIReorientate() && direction == "reverse" {
-						B.ReverseComplement(true)
-						A.ReverseComplement(true)
 						B.PairTo(A)
 						batch.Slice()[i] = B
 					}
@@ -162,9 +167,9 @@ func IPCRTagPESequencesBatch(iterator obiiter.IBioSequence,
 
 	newIter.Add(nworkers)
 	for i := 1; i < nworkers; i++ {
-		go f(iterator.Split(), i)
+		go f(iterator.Split())
 	}
-	go f(iterator, 0)
+	go f(iterator)
 
 	go func() {
 		newIter.WaitAndClose()