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Add support for $RESTIC_CACHE_DIR

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Add support for restic-specific $RESTIC_CACHE_DIR environment variable
to override the cache directory like --cache-dir would have.
This commit is contained in:
Stephane Thiell 2019-09-26 15:48:52 -07:00
parent 604b18aa74
commit 0e897ef7b8
2 changed files with 10 additions and 5 deletions
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7
doc/manual_rest.rst
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@ -376,9 +376,10 @@ OS-specific cache folder:
* macOS: ``~/Library/Caches/restic`` * macOS: ``~/Library/Caches/restic``
* Windows: ``%LOCALAPPDATA%/restic`` * Windows: ``%LOCALAPPDATA%/restic``
The command line parameter ``--cache-dir`` can each be used to override the The command line parameter ``--cache-dir`` or the environment variable
default cache location. The parameter ``--no-cache`` disables the cache ``$RESTIC_CACHE_DIR`` can be used to override the default cache location. The
entirely. In this case, all data is loaded from the repo. parameter ``--no-cache`` disables the cache entirely. In this case, all data
is loaded from the repo.
The cache is ephemeral: When a file cannot be read from the cache, it is loaded The cache is ephemeral: When a file cannot be read from the cache, it is loaded
from the repository. from the repository.

8
internal/cache/dir.go vendored
View file

@ -12,17 +12,21 @@ import (
// xdgCacheDir returns the cache directory according to XDG basedir spec, see // xdgCacheDir returns the cache directory according to XDG basedir spec, see
// http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html // http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
// unless RESTIC_CACHE_DIR is defined
func xdgCacheDir() (string, error) { func xdgCacheDir() (string, error) {
cachedir := os.Getenv("RESTIC_CACHE_DIR")
xdgcache := os.Getenv("XDG_CACHE_HOME") xdgcache := os.Getenv("XDG_CACHE_HOME")
home := os.Getenv("HOME") home := os.Getenv("HOME")
if xdgcache != "" { if cachedir != "" {
return cachedir, nil
} else if xdgcache != "" {
return filepath.Join(xdgcache, "restic"), nil return filepath.Join(xdgcache, "restic"), nil
} else if home != "" { } else if home != "" {
return filepath.Join(home, ".cache", "restic"), nil return filepath.Join(home, ".cache", "restic"), nil
} }
return "", errors.New("unable to locate cache directory (XDG_CACHE_HOME and HOME unset)") return "", errors.New("unable to locate cache directory (RESTIC_CACHE_DIR, XDG_CACHE_HOME and HOME unset)")
} }
// windowsCacheDir returns the cache directory for Windows. // windowsCacheDir returns the cache directory for Windows.