feat(pdm): InstallScript — run a script from the package after install

pdm-control optional 'InstallScript: <path-in-pkg>' runs a script shipped in the
package once the files are installed (like a Debian postinst). The script is
chmod +x and executed with PMM_ROOT=<install dir>; its exit code is reported.
Added i18n keys (zh/en builtin + packs) and docs.

src/pdm.c

@@ -668,6 +668,37 @@ int pdm_install_file(const char *pdmfile) {
             pmm_sync_self(nb);
     }
 
+    /* InstallScript: run a script shipped in the package after install (like a
+     * Debian postinst). The script path is relative to the package's install
+     * dir (root, or root/<InstallDir>). */
+    char *post = control_get(ctl, "InstallScript");
+    if (post && *post) {
+        char sroot[1500];
+        if (flat) snprintf(sroot, sizeof(sroot), "%s", home);
+        else if (pmm_install_subdir[0]) snprintf(sroot, sizeof(sroot), "%s/%s", root, pmm_install_subdir);
+        else snprintf(sroot, sizeof(sroot), "%s", root);
+        char spath[1700];
+        snprintf(spath, sizeof(spath), "%s/%s", sroot, post);
+        char cx[1800];
+        snprintf(cx, sizeof(cx), "chmod +x \"%s\" 2>/dev/null || true", spath);
+        system(cx);
+        FILE *xf = fopen(spath, "rb");
+        if (xf) {
+            fclose(xf);
+#ifdef _WIN32
+            _putenv_s("PMM_ROOT", sroot);
+#else
+            setenv("PMM_ROOT", sroot, 1);       /* give the script its install dir */
+#endif
+            int src = system(spath);
+            if (src == 0) pmm_success("%s", pmm_tr_fmt("msg.postinst-ok", spath));
+            else pmm_warn("%s", pmm_tr_fmt("msg.warn.postinst", spath));
+        } else {
+            pmm_warn("%s", pmm_tr_fmt("msg.warn.postinst-missing", spath));
+        }
+        free(post);
+    }
+
     free(pkg); if (ver) free(ver);
     return 0;
 }

web/docs/md/ppdm.md

@@ -81,10 +81,12 @@ Maintainer: you@mail.com
 # 可选:
 # LibraryPath: true   # 装到 ~/.pmm/root 后，自动把本包 lib/ 加入 LD_LIBRARY_PATH（新 shell 生效）
 # InstallDir: tools/myapp   # 把本包装到 ~/.pmm/root/tools/myapp (bin -> .../bin, lib -> .../lib)
+# InstallScript: bin/postinst.sh   # 安装后自动运行包内脚本(可访问 $PMM_ROOT 环境变量)
 ```
 
 > `LibraryPath` 默认 `false`（不加）；`true` 时 pmm 会在 `~/.bashrc` 写入本包 lib 目录的
 > `LD_LIBRARY_PATH`。`InstallDir` 可把包装到 `~/.pmm/root/<子目录>`，该目录下的 `bin` 也会进 PATH。
+> `InstallScript` 指向包内脚本路径，安装后执行（环境变量 `$PMM_ROOT` = 本包安装目录）。
 
 打包：
 

web/mirror/lang/en-US.pjson

@@ -134,5 +134,8 @@
   "desc.cache": "manage download cache",
   "desc.fetch": "predownload to cache",
   "msg.offline-using-cache": "offline: using cached %s",
-  "msg.err.not-cached": "%s not in cache (run pmm fetch)"
+  "msg.err.not-cached": "%s not in cache (run pmm fetch)",
+  "msg.postinst-ok": "post-install script ran OK: %s",
+  "msg.warn.postinst": "post-install script returned non-zero: %s",
+  "msg.warn.postinst-missing": "post-install script missing: %s"
 }

web/mirror/lang/zh-CN.pjson

@@ -134,5 +134,8 @@
   "desc.cache": "管理缓存",
   "desc.fetch": "预下载到缓存",
   "msg.offline-using-cache": "离线: 使用缓存 %s",
-  "msg.err.not-cached": "%s 未在缓存中（先运行 pmm fetch）"
+  "msg.err.not-cached": "%s 未在缓存中（先运行 pmm fetch）",
+  "msg.postinst-ok": "安装后脚本执行成功: %s",
+  "msg.warn.postinst": "安装后脚本返回非 0: %s",
+  "msg.warn.postinst-missing": "安装后脚本缺失: %s"
 }