Merge branch 'js/alias-early-config' into maint

The code to pick up and execute command alias definition from the
configuration used to switch to the top of the working tree and
then come back when the expanded alias was executed, which was
unnecessarilyl complex.  Attempt to simplify the logic by using the
early-config mechanism that does not chdir around.

* js/alias-early-config:
alias: use the early config machinery to expand aliases
t7006: demonstrate a problem with aliases in subdirectories
t1308: relax the test verifying that empty alias values are disallowed
help: use early config when autocorrecting aliases
config: report correct line number upon error
discover_git_directory(): avoid setting invalid git_dir

diff --git a/alias.c b/alias.c
index 3b90397a99d9f7ed4a0c1c5a83f5e69c879e752f..05263046614e10945cb8d81ef3e42e0d5f2c9a2e 100644 (file)
--- a/alias.c
+++ b/alias.c
@@ -1,14 +1,28 @@
 #include "cache.h"
 
+struct config_alias_data {
+       const char *alias;
+       char *v;
+};
+
+static int config_alias_cb(const char *key, const char *value, void *d)
+{
+       struct config_alias_data *data = d;
+       const char *p;
+
+       if (skip_prefix(key, "alias.", &p) && !strcmp(p, data->alias))
+               return git_config_string((const char **)&data->v, key, value);
+
+       return 0;
+}
+
 char *alias_lookup(const char *alias)
 {
-       char *v = NULL;
-       struct strbuf key = STRBUF_INIT;
-       strbuf_addf(&key, "alias.%s", alias);
-       if (git_config_key_is_valid(key.buf))
-               git_config_get_string(key.buf, &v);
-       strbuf_release(&key);
-       return v;
+       struct config_alias_data data = { alias, NULL };
+
+       read_early_config(config_alias_cb, &data);
+
+       return data.v;
 }
 
 #define SPLIT_CMDLINE_BAD_ENDING 1

diff --git a/config.c b/config.c
index a30056ec7e9a0cca87dea494a92a4671a19b7643..f0511e58e2af4235201a01618134a020592cf11c 100644 (file)
--- a/config.c
+++ b/config.c
@@ -588,7 +588,8 @@ static int get_value(config_fn_t fn, void *data, struct strbuf *name)
         */
        cf->linenr--;
        ret = fn(name->buf, value, data);
-       cf->linenr++;
+       if (ret >= 0)
+               cf->linenr++;
        return ret;
 }
 

diff --git a/git.c b/git.c
index 8ff44f081d43176474b267de5451f2c2e88089d0..58ef570294da1ffc8fed38609d140833426dd14f 100644 (file)
--- a/git.c
+++ b/git.c
@@ -16,50 +16,6 @@ const char git_more_info_string[] =
           "to read about a specific subcommand or concept.");
 
 static int use_pager = -1;
-static char *orig_cwd;
-static const char *env_names[] = {
-       GIT_DIR_ENVIRONMENT,
-       GIT_WORK_TREE_ENVIRONMENT,
-       GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
-       GIT_PREFIX_ENVIRONMENT
-};
-static char *orig_env[4];
-static int save_restore_env_balance;
-
-static void save_env_before_alias(void)
-{
-       int i;
-
-       assert(save_restore_env_balance == 0);
-       save_restore_env_balance = 1;
-       orig_cwd = xgetcwd();
-       for (i = 0; i < ARRAY_SIZE(env_names); i++) {
-               orig_env[i] = getenv(env_names[i]);
-               orig_env[i] = xstrdup_or_null(orig_env[i]);
-       }
-}
-
-static void restore_env(int external_alias)
-{
-       int i;
-
-       assert(save_restore_env_balance == 1);
-       save_restore_env_balance = 0;
-       if (!external_alias && orig_cwd && chdir(orig_cwd))
-               die_errno("could not move to %s", orig_cwd);
-       free(orig_cwd);
-       for (i = 0; i < ARRAY_SIZE(env_names); i++) {
-               if (external_alias &&
-                   !strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT))
-                       continue;
-               if (orig_env[i]) {
-                       setenv(env_names[i], orig_env[i], 1);
-                       free(orig_env[i]);
-               } else {
-                       unsetenv(env_names[i]);
-               }
-       }
-}
 
 static void commit_pager_choice(void) {
        switch (use_pager) {
@@ -250,19 +206,18 @@ static int handle_alias(int *argcp, const char ***argv)
        const char **new_argv;
        const char *alias_command;
        char *alias_string;
-       int unused_nongit;
-
-       save_env_before_alias();
-       setup_git_directory_gently(&unused_nongit);
 
        alias_command = (*argv)[0];
        alias_string = alias_lookup(alias_command);
        if (alias_string) {
                if (alias_string[0] == '!') {
                        struct child_process child = CHILD_PROCESS_INIT;
+                       int nongit_ok;
+
+                       /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
+                       setup_git_directory_gently(&nongit_ok);
 
                        commit_pager_choice();
-                       restore_env(1);
 
                        child.use_shell = 1;
                        argv_array_push(&child.args, alias_string + 1);
@@ -308,8 +263,6 @@ static int handle_alias(int *argcp, const char ***argv)
                ret = 1;
        }
 
-       restore_env(0);
-
        errno = saved_errno;
 
        return ret;

diff --git a/help.c b/help.c
index db7f3d79a016881639a8c0640451afe35b011e5e..b44c55ec2da515d12c1327f01202621738fa8653 100644 (file)
--- a/help.c
+++ b/help.c
@@ -289,7 +289,7 @@ const char *help_unknown_cmd(const char *cmd)
        memset(&other_cmds, 0, sizeof(other_cmds));
        memset(&aliases, 0, sizeof(aliases));
 
-       git_config(git_unknown_cmd_config, NULL);
+       read_early_config(git_unknown_cmd_config, NULL);
 
        load_command_list("git-", &main_cmds, &other_cmds);
 

diff --git a/setup.c b/setup.c
index e3f7699a902aed20a83820067cf913df2f3750a9..2435186e448a6bf09616b0f1de1225ff2a666e48 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -982,6 +982,7 @@ const char *discover_git_directory(struct strbuf *gitdir)
                warning("ignoring git dir '%s': %s",
                        gitdir->buf + gitdir_offset, err.buf);
                strbuf_release(&err);
+               strbuf_setlen(gitdir, gitdir_offset);
                return NULL;
        }
 

diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 13b7851f7c2feb87f63449d917380452e85c1f84..a37ef0422212eafdae4b4c0fae9e28d4a183117f 100755 (executable)
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -703,6 +703,12 @@ test_expect_success 'invalid unit' '
        test_i18ngrep "bad numeric config value .1auto. for .aninvalid.unit. in file .git/config: invalid unit" actual
 '
 
+test_expect_success 'line number is reported correctly' '
+       printf "[bool]\n\tvar\n" >invalid &&
+       test_must_fail git config -f invalid --path bool.var 2>actual &&
+       test_i18ngrep "line 2" actual
+'
+
 test_expect_success 'invalid stdin config' '
        echo "[broken" | test_must_fail git config --list --file - >output 2>&1 &&
        test_i18ngrep "bad config line 1 in standard input" output

diff --git a/t/t1308-config-set.sh b/t/t1308-config-set.sh
index ff50960ccaed9953c5738c9bbf602bf0d326e15a..69a0aa56d6d7b759e71a57d24b838fe21a544777 100755 (executable)
--- a/t/t1308-config-set.sh
+++ b/t/t1308-config-set.sh
@@ -215,7 +215,9 @@ test_expect_success 'check line errors for malformed values' '
                br
        EOF
        test_expect_code 128 git br 2>result &&
-       test_i18ngrep "fatal: .*alias\.br.*\.git/config.*line 2" result
+       test_i18ngrep "missing value for .alias\.br" result &&
+       test_i18ngrep "fatal: .*\.git/config" result &&
+       test_i18ngrep "fatal: .*line 2" result
 '
 
 test_expect_success 'error on modifying repo config without repo' '

diff --git a/t/t7006-pager.sh b/t/t7006-pager.sh
index 4f3794d415e95b0b65ca29b829ce278b45ea5dbd..20b4d83c281e2fde8812f309bdebef012c6ecb74 100755 (executable)
--- a/t/t7006-pager.sh
+++ b/t/t7006-pager.sh
@@ -391,6 +391,17 @@ test_expect_success TTY 'core.pager in repo config works and retains cwd' '
        )
 '
 
+test_expect_success TTY 'core.pager is found via alias in subdirectory' '
+       sane_unset GIT_PAGER &&
+       test_config core.pager "cat >via-alias" &&
+       (
+               cd sub &&
+               rm -f via-alias &&
+               test_terminal git -c alias.r="-p rev-parse" r HEAD &&
+               test_path_is_file via-alias
+       )
+'
+
 test_doesnt_paginate      expect_failure test_must_fail 'git -p nonsense'
 
 test_pager_choices                       'git shortlog'