diff options
| -rw-r--r-- | Documentation/git-archive.txt | 16 | ||||
| -rw-r--r-- | archive-tar.c | 107 | ||||
| -rwxr-xr-x | t/t5000-tar-tree.sh | 43 |
3 files changed, 165 insertions, 1 deletions
diff --git a/Documentation/git-archive.txt b/Documentation/git-archive.txt index 9c750e2444..726bf63d46 100644 --- a/Documentation/git-archive.txt +++ b/Documentation/git-archive.txt @@ -101,6 +101,16 @@ tar.umask:: details. If `--remote` is used then only the configuration of the remote repository takes effect. +tar.<format>.command:: + This variable specifies a shell command through which the tar + output generated by `git archive` should be piped. The command + is executed using the shell with the generated tar file on its + standard input, and should produce the final output on its + standard output. Any compression-level options will be passed + to the command (e.g., "-9"). An output file with the same + extension as `<format>` will be use this format if no other + format is given. + ATTRIBUTES ---------- @@ -149,6 +159,12 @@ git archive -o latest.zip HEAD:: commit on the current branch. Note that the output format is inferred by the extension of the output file. +git config tar.tar.xz.command "xz -c":: + + Configure a "tar.xz" format for making LZMA-compressed tarfiles. + You can use it specifying `--format=tar.xz`, or by creating an + output file like `-o foo.tar.xz`. + SEE ALSO -------- diff --git a/archive-tar.c b/archive-tar.c index bed9a9b15c..5c30747f9c 100644 --- a/archive-tar.c +++ b/archive-tar.c @@ -4,6 +4,7 @@ #include "cache.h" #include "tar.h" #include "archive.h" +#include "run-command.h" #define RECORDSIZE (512) #define BLOCKSIZE (RECORDSIZE * 20) @@ -13,6 +14,9 @@ static unsigned long offset; static int tar_umask = 002; +static int write_tar_filter_archive(const struct archiver *ar, + struct archiver_args *args); + /* writes out the whole block, but only if it is full */ static void write_if_needed(void) { @@ -220,6 +224,60 @@ static int write_global_extended_header(struct archiver_args *args) return err; } +static struct archiver **tar_filters; +static int nr_tar_filters; +static int alloc_tar_filters; + +static struct archiver *find_tar_filter(const char *name, int len) +{ + int i; + for (i = 0; i < nr_tar_filters; i++) { + struct archiver *ar = tar_filters[i]; + if (!strncmp(ar->name, name, len) && !ar->name[len]) + return ar; + } + return NULL; +} + +static int tar_filter_config(const char *var, const char *value, void *data) +{ + struct archiver *ar; + const char *dot; + const char *name; + const char *type; + int namelen; + + if (prefixcmp(var, "tar.")) + return 0; + dot = strrchr(var, '.'); + if (dot == var + 9) + return 0; + + name = var + 4; + namelen = dot - name; + type = dot + 1; + + ar = find_tar_filter(name, namelen); + if (!ar) { + ar = xcalloc(1, sizeof(*ar)); + ar->name = xmemdupz(name, namelen); + ar->write_archive = write_tar_filter_archive; + ar->flags = ARCHIVER_WANT_COMPRESSION_LEVELS; + ALLOC_GROW(tar_filters, nr_tar_filters + 1, alloc_tar_filters); + tar_filters[nr_tar_filters++] = ar; + } + + if (!strcmp(type, "command")) { + if (!value) + return config_error_nonbool(var); + free(ar->data); + ar->data = xstrdup(value); + return 0; + } + + return 0; +} + static int git_tar_config(const char *var, const char *value, void *cb) { if (!strcmp(var, "tar.umask")) { @@ -231,7 +289,8 @@ static int git_tar_config(const char *var, const char *value, void *cb) } return 0; } - return 0; + + return tar_filter_config(var, value, cb); } static int write_tar_archive(const struct archiver *ar, @@ -248,6 +307,45 @@ static int write_tar_archive(const struct archiver *ar, return err; } +static int write_tar_filter_archive(const struct archiver *ar, + struct archiver_args *args) +{ + struct strbuf cmd = STRBUF_INIT; + struct child_process filter; + const char *argv[2]; + int r; + + if (!ar->data) + die("BUG: tar-filter archiver called with no filter defined"); + + strbuf_addstr(&cmd, ar->data); + if (args->compression_level >= 0) + strbuf_addf(&cmd, " -%d", args->compression_level); + + memset(&filter, 0, sizeof(filter)); + argv[0] = cmd.buf; + argv[1] = NULL; + filter.argv = argv; + filter.use_shell = 1; + filter.in = -1; + + if (start_command(&filter) < 0) + die_errno("unable to start '%s' filter", argv[0]); + close(1); + if (dup2(filter.in, 1) < 0) + die_errno("unable to redirect descriptor"); + close(filter.in); + + r = write_tar_archive(ar, args); + + close(1); + if (finish_command(&filter) != 0) + die("'%s' filter reported error", argv[0]); + + strbuf_release(&cmd); + return r; +} + static struct archiver tar_archiver = { "tar", write_tar_archive, @@ -256,6 +354,13 @@ static struct archiver tar_archiver = { void init_tar_archiver(void) { + int i; register_archiver(&tar_archiver); + git_config(git_tar_config, NULL); + for (i = 0; i < nr_tar_filters; i++) { + /* omit any filters that never had a command configured */ + if (tar_filters[i]->data) + register_archiver(tar_filters[i]); + } } diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh index cff1b3e050..1f9069213a 100755 --- a/t/t5000-tar-tree.sh +++ b/t/t5000-tar-tree.sh @@ -252,4 +252,47 @@ test_expect_success 'git-archive --prefix=olde-' ' test -f h/olde-a/bin/sh ' +test_expect_success 'setup tar filters' ' + git config tar.tar.foo.command "tr ab ba" && + git config tar.bar.command "tr ab ba" +' + +test_expect_success 'archive --list mentions user filter' ' + git archive --list >output && + grep "^tar\.foo\$" output && + grep "^bar\$" output +' + +test_expect_success 'archive --list shows remote user filters' ' + git archive --list --remote=. >output && + grep "^tar\.foo\$" output && + grep "^bar\$" output +' + +test_expect_success 'invoke tar filter by format' ' + git archive --format=tar.foo HEAD >config.tar.foo && + tr ab ba <config.tar.foo >config.tar && + test_cmp b.tar config.tar && + git archive --format=bar HEAD >config.bar && + tr ab ba <config.bar >config.tar && + test_cmp b.tar config.tar +' + +test_expect_success 'invoke tar filter by extension' ' + git archive -o config-implicit.tar.foo HEAD && + test_cmp config.tar.foo config-implicit.tar.foo && + git archive -o config-implicit.bar HEAD && + test_cmp config.tar.foo config-implicit.bar +' + +test_expect_success 'default output format remains tar' ' + git archive -o config-implicit.baz HEAD && + test_cmp b.tar config-implicit.baz +' + +test_expect_success 'extension matching requires dot' ' + git archive -o config-implicittar.foo HEAD && + test_cmp b.tar config-implicittar.foo +' + test_done |