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lib/transform: add transform library and --name-transform flag

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lib/transform adds the transform library, supporting advanced path name
transformations for converting and renaming files and directories by applying
prefixes, suffixes, and other alterations.

It also adds the --name-transform flag for use with sync, copy, and move.

Multiple transformations can be used in sequence, applied in the order they are
specified on the command line.

By default --name-transform will only apply to file names. The means only the leaf
file name will be transformed. However some of the transforms would be better
applied to the whole path or just directories. To choose which which part of the
file path is affected some tags can be added to the --name-transform:

file	Only transform the leaf name of files (DEFAULT)
dir	Only transform name of directories - these may appear anywhere in the path
all	Transform the entire path for files and directories

Example syntax:
--name-transform file,prefix=ABC
--name-transform dir,prefix=DEF
This commit is contained in:
nielash
2025-05-04 03:10:48 -04:00
committed by Nick Craig-Wood
parent 41a407dcc9
commit 013c563293
18 changed files with 1529 additions and 224 deletions
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27
cmd/bisync/resolve.go
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@ -4,8 +4,6 @@ import (
"context"
"fmt"
"math"
"mime"
"path"
"strings"
"time"
@ -13,6 +11,7 @@ import (
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/fs/operations"
"github.com/rclone/rclone/lib/terminal"
"github.com/rclone/rclone/lib/transform"
)
// Prefer describes strategies for resolving sync conflicts
@ -97,8 +96,8 @@ func (b *bisyncRun) setResolveDefaults(ctx context.Context) error {
}
// replace glob variables, if any
t := time.Now() // capture static time here so it is the same for all files throughout this run
b.opt.ConflictSuffix1 = bilib.AppyTimeGlobs(b.opt.ConflictSuffix1, t)
b.opt.ConflictSuffix2 = bilib.AppyTimeGlobs(b.opt.ConflictSuffix2, t)
b.opt.ConflictSuffix1 = transform.AppyTimeGlobs(b.opt.ConflictSuffix1, t)
b.opt.ConflictSuffix2 = transform.AppyTimeGlobs(b.opt.ConflictSuffix2, t)
// append dot (intentionally allow more than one)
b.opt.ConflictSuffix1 = "." + b.opt.ConflictSuffix1
@ -130,6 +129,7 @@ type (
path2 namePair
}
)
type namePair struct {
oldName string
newName string
@ -240,24 +240,7 @@ func SuffixName(ctx context.Context, remote, suffix string) string {
}
ci := fs.GetConfig(ctx)
if ci.SuffixKeepExtension {
var (
base = remote
exts = ""
first = true
ext = path.Ext(remote)
)
for ext != "" {
// Look second and subsequent extensions in mime types.
// If they aren't found then don't keep it as an extension.
if !first && mime.TypeByExtension(ext) == "" {
break
}
base = base[:len(base)-len(ext)]
exts = ext + exts
first = false
ext = path.Ext(base)
}
return base + suffix + exts
return transform.SuffixKeepExtension(remote, suffix)
}
return remote + suffix
}